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F1 is the generation produced by cross pollination of one character such as height at a time whereas F2 generation is produced by self pollinating the plants obtained in F1 generation. Recessive traits : The traits which cannot express itself over contrasting traits is called a recessive trait. For example Shortness in F1 generation. Dominant trait: The trait which can express itself over other contrasting traits is dominant trait. For example Tallness

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Gaurav Seth 5 years ago

F1 (also called first filial generation) are offspring produced by crossing traits of parents and F2 (also called second filial generation) are offspring produced by crossing of traits of offspring produced in F1 generation.

Dominant trait: The trait which can express its effect over contrasting trait is called a dominant trait. It is expressed even in the presence of one copy of an allele for a particular character in the gene, i.e., it is expressed in the heterozygous condition.

Example: Yy represents dominant trait for yellow seed colour. Seed is yellow even when single copy is dominant allele Y is present.

Recessive trait: The trait which cannot express its effect over contrasting trait or which gets suppressed by the contrasting trait is called a recessive trait. It is expressed only when two copies of an allele for a particular character in the gene are present, i.e., it is expressed in the homozygous condition and in the absence of corresponding dominant trait.

Example: yy shows recessive trait for green seed colour. It is expressed only when two copies of recessive allele yy is present.

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Why white light is dispersed into seven colors by prism not by rectangular glass slab?

Posted by Mahak Sadhya 5 years ago

CBSE > Class 10 > Science

3 answers

Aanya Jain 5 years ago

The white light is dispersed into seven colour by prism and not rectangular slab because slab performs as two glass prism placed inverted with respect to each other , so when white light is passed through one prism dispersed but again emerge out as white light due to the other inverted prism.

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Mahak Sadhya 5 years ago

Thanks

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Account Deleted 5 years ago

The dispersion occurs in prism but not in glass slab because of the geometric design. In a slab, the opposite sides are parallel to each other whereas in the case of the prism, the sides are not parallel to each other. ... They travel a very small distance in the glass slab to meet the second interface.

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Importance of light in photosynthesis

Posted by Dimple Sahu 5 years ago

CBSE > Class 10 > Science

1 answers

Gaurav Seth 5 years ago

The process of photosynthesis occurs when green plants use the energy of light to convert carbon dioxide (CO2) and water (H2O) into carbohydrates. Light energy is absorbed by chlorophyll, a photosynthetic pigment of the plant, while air containing carbon dioxide and oxygen enters the plant through the leaf stomata.

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Someone can tell me which book is best to get 95+ marks.

Posted by Mahak Aggarwal 5 years ago

CBSE > Class 10 > Science

5 answers

Maxtern .Op 5 years ago

In my opinion (personal) .S.chand is the best for concept learning . I got 90+ percentile in P3.it is the BEST.

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Omm Shree Bibhudatta Maharana 5 years ago

Only NCERT books And notes

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Mayank Rauthan 5 years ago

You can refer Rs Agarwal and solve many sample paper. But focus more on NCERT

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Mahak Sadhya 5 years ago

Only

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Gaurav Seth 5 years ago

NCERT books

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State and derive joules law

Posted by Geetha Bhat Geetha 5 years ago

CBSE > Class 10 > Science

3 answers

Maxtern .Op 5 years ago

Gaurav Seth will be the CBSE topper this year. Itna kaise padhata hai be

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Mayank Rauthan 5 years ago

Joule's law of heating states that heat produced in joules when a current of I amperes flows in a wire of resistance R ohms for time t seconds is given by H = I2Rt.

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Gaurav Seth 5 years ago

(a) Joule's law of heating states that heat produced in joules when a current of I amperes flows in a wire of resistance R ohms for time t seconds is given by H = I²Rt.

Thus the heat produced in a wire is directly proportional to:

(i) Square of current

(ii) Resistance of wire

(iii) Time for which current is passed

(b) Given: R₁=40ohms, R₂=60ohms (in series), V=220V, t=30sec

We know that

Total resistance, R=40+60=100ohms

By Ohm's law,

V = IR

I = V/R

I = 220/100 = 2.2amp

Putting the values of I, R and t in eq. H = I²RT

H = 2.2² X 100 X 30

H = 14520 J

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What is field lines? What is magnetic field lines? Write the characteristics of magnetic field lines ?

Posted by Geetha Bhat Geetha 5 years ago

CBSE > Class 10 > Science

2 answers

Vijay Anand V 5 years ago

Magnetic field lines are lines drawn along the north magnetic pole of an magnetic material.

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Gaurav Seth 5 years ago

(a) Magnetic field:
The magnetic field is the area around a magnet in which there is magnetic force. Moving electric charges can make magnetic fields. In physics, the magnetic field is a field that passes through space and which makes a magnetic force move electric charges and magnetic dipoles.
(b) Magnetic lines around bar magnet:

This is the respective diagram of a bar magnet with magnetic field lines.
The lines originate from the north pole and terminate on the south pole of the bar magnet.
The magnetic field lines make closed loops.
(c) Characteristics of magnetic field lines:

The lines originate from the north pole and terminate on the south pole of the bar magnet.
The strength of the magnetic field is proportional to the density of lines.
Magnetic field lines cannot cross each other.
Magnetic field lines are continuous loops.

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Do organism exact copy of themselves? If yes then how explain briefly

Posted by Geetha Bhat Geetha 5 years ago

CBSE > Class 10 > Science

1 answers

Mayank Rauthan 5 years ago

The organism which are reproduced by asexual mode of reproduction are exact copy of themselves while the organism which are reproduced by sexual mode of reproduction are not exact copy of the organism. This all happens because of variation.

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Write the properties of ionic compounds

Posted by Geetha Bhat Geetha 5 years ago

CBSE > Class 10 > Science

1 answers

Gaurav Seth 5 years ago

Properties of Ionic compound:

Ionic compounds are solid. Ionic bond has greater force of attraction because of which ions attract each other strongly. This makes ionic compounds solid.
Ionic compounds are brittle.
Ionic compounds have high melting and boiling points because force of attraction between ions of ionic compounds is very strong.
Ionic compounds generally dissolve in water.
Ionic compounds are generally insoluble in organic solvents; like kerosene, petrol, etc.
Ionic compounds do not conduct electricity in solid state.
Solution of ionic compounds in water conduct electricity. This happens because ions present in the solution of ionic compound facilitate the passage of electricity by moving towards opposite electrodes.
Ionic compounds conduct electricity in molten state.

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Define term volt

Posted by Jhon Rathi 5 years ago

CBSE > Class 10 > Science

4 answers

ऋShav राJ 5 years ago

The 1 joul of work done to carrying 1 column of charge from infinity to the point is known as 1 volt

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Mayank Rauthan 5 years ago

When 1joule of work is done to move 1coulomb of charge then it is called 1volt. V=W/Q OR V=J/C

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Shoaib Ansari 5 years ago

Volt: Volt is the unit of potential difference between two points. If 1 joule work is done to move 1 coulomb positive charge from one point to another, then the potential difference between the points is 1 volt. IV = 1JC-1 One volt is also defined as the potential difference across a resistance of 1 Ohm when 1 ampere of current flows through it.

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Gaurav Seth 5 years ago

Volt: Volt is the unit of potential difference between two points. If 1 joule work is done to move 1 coulomb positive charge from one point to another, then the potential difference between the points is 1 volt.
IV = 1JC-1
One volt is also defined as the potential difference across a resistance of 1 Ohm when 1 ampere of current flows through it.

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In which group metalloid present in periodic table

Posted by Md Asim 5 years ago

CBSE > Class 10 > Science

2 answers

Shoaib Ansari 5 years ago

Groups 13–16 of the periodic table of p block are the only groups that contain elements classified as metalloids. Unlike other groups of the periodic table, which contain elements in just one class, groups 13–16 contain elements in at least two different classes. Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), Polonium (Po). Here we can see that these seven elements were classified as metalloids in the periodic table from the 13th to the 16th group of p-block.

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Gaurav Seth 5 years ago

Groups 13–16 of the periodic table of p block are the only groups that contain elements classified as metalloids. Unlike other groups of the periodic table, which contain elements in just one class, groups 13–16 contain elements in at least two different classes.

Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), Polonium (Po). Here we can see that these seven elements were classified as metalloids in the periodic table from the 13th to the 16th group of p-block.

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On which side of the table do you find the non metal in periodic table

Posted by Md Asim 5 years ago

CBSE > Class 10 > Science

2 answers

Gaurav Seth 5 years ago

Right

Explanation:

The metals are to the left of the line (except for hydrogen, which is a nonmetal), the nonmetals are to the right of the line, and the elements immediately adjacent to the line are the metalloids.

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Harsh Rathor 5 years ago

Right hand side

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Mention 5 Application of Ohm's Law ???

Posted by Vishal Gupta 5 years ago

CBSE > Class 10 > Science

1 answers

Arjun Deshmukh 5 years ago

Power Supplied to Electrical Heater The electrical heater is a commonly used appliance in winters. Provided with the resistance of heater coil and applied voltage, We can calculate the power supplied to this heater. Let’s assume that resistance of heater coil is 5 ohm and input voltages are 120V. We can use the formula from Ohmic Wheel: P = V2/R to find the power, P = 1202/5 ohm = 2880 watt. This power can then be multiplied with time to calculate the electricity bill at our premises. Selection of Fuses Fuses and circuit breakers are the protection components which connect in series with the electronic devices. Fuses/CB’s are rated in Amperes. The current rating of the fuse is calculated by Using the Ohm’s Law. Here are the two cases where you can utilize Ohm’s law for the selection of fuses. Design of Electronic Devices The electronic devices such as laptop and mobile phones require a dc power supply with the specific current rating. Typical mobile phone batteries require 0.7 – 1 A. A resistor is used to control the rate of current flowing through these components. The Ohm’s law is used to calculate the rating of current which should be used in the typical circuit. The example below illustrates this. Example: A mobile phone requires a current of 0.8 A while providing 5 volts across it. Find the resistance. Solution: R = V/I = 5/0.8 A = 6.25 Ω Sizing of Resistors in consumer electronics The electronic components such as normal power supplies, uninterruptable supplies, iron, kettle, televisions and similar components use a lot of resistors for their control purposes. The wattage sizing of any resistor should be carefully selected for this purpose. The Ohm’s law is used to size the resistors by using the formula P = VI Speed Control of Conventional Fans The speed control of conventional fans is achieved by using a potentiometer. A potentiometer is a variable resistance. A circular knob on the component can be rotated to achieve a variable resistance on the output terminals. For any specific value of the input, we can calculate the resistance, current and thus power flowing through Ohm’s Law.

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Write a short note on micelle formation for 5 marks

Posted by Aakriti Rustagi 5 years ago

CBSE > Class 10 > Science

2 answers

Md Asim 5 years ago

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Md Asim 5 years ago

I imperessed him

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cake ko mulayam air sanju bnana ke liye usme ek safed paudar dala jata hai iss safed paudar ka naam btao safety paudar ke awayawo ke naam likho

Posted by Nikhil Kumar 5 years ago

CBSE > Class 10 > Science

3 answers

Harsh Rathor 5 years ago

Baking powder

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Md Asim 5 years ago

Which school belongs to you

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Prachi Tiwari 5 years ago

Baking powder

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Reactions of water with hydroxide ?

Posted by Sandeep Kumar 5 years ago

CBSE > Class 10 > Science

2 answers

Adhi Pragathees 5 years ago

When sodium hydroxide (NaOH) dissolves in water, it separates into positively - charged sodium ions (cations) and negatively - charged hydroxide ions (anions). ... Each mole of sodium hydroxide that dissolves will produce one mole of sodium ions and one mole of hydroxide ions.

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Trineshwar H 5 years ago

The hydroxide ions combine with the bicarbonate ions in the water to produce water and a carbonate ion.

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upto which elements, the law of octaves was found to be aaplicable

Posted by Shweta Singh 5 years ago

CBSE > Class 10 > Science

4 answers

Md Asim 5 years ago

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Archi Jain 5 years ago

Up to calcium

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Sandeep Kumar 5 years ago

Upto calcium

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Manav Kumar 5 years ago

The law of octave was applicable upto calcium only.

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ANSWER

To study the chemical reaction between quick lime and water

Posted by Saurabh Kumar 5 years ago

CBSE > Class 10 > Science

1 answers

Awtansh Dixit 5 years ago

Slake lime

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What happens to the current passing through a conductor which is placed between likes poles of bar magnet that repel each other?

Posted by Harsa Varsuthaa 5 years ago

CBSE > Class 10 > Science

0 answers

ANSWER

Carbon and silicon are tetravalent Carbon show catenation property but silicon does not show why

Posted by Prachi Tiwari 5 years ago

CBSE > Class 10 > Science

3 answers

Archi Jain 5 years ago

Silicon bond is highly unstable

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Abhi Aneja 5 years ago

Because it is silcon

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Mohammad Junaid Khan 5 years ago

from chains containing 20 or more carbon atoms) whereas silicon shows catenation to small extent only (form chains containing not more than 6 silicon atoms). This is because the property of catenation depends on the bond strength of atom-atom bon

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When we will have practical of reproduction in human beings , I want to do it

Posted by Maxtern .Op 5 years ago

CBSE > Class 10 > Science

4 answers

Mahak Sadhya 5 years ago

Kutte Tu bahut bolta hai teri toh) ₹;₹:&! "! Ja apni ma aur behn ke sath kariyo aur kitni gali khayega

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Maxtern .Op 5 years ago

Mohammad junaid khan tere maa ka bhosdapan

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Mahak Sadhya 5 years ago

Kameene

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Mahak Sadhya 5 years ago

Besharam

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What do you mean by anode and cathode

Posted by Satyam Kr 5 years ago

CBSE > Class 10 > Science

1 answers

Manav Kumar 5 years ago

Annode is the positive electrode and cathode is the negative electrode .

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an object of height 5 cm is placed in the front of a lens find the position,size and nature of the image if lens is- a.convex lens of focal length 15cm b. a concave lens of focal length 10 cm distance of object and lens is 10cm.

Posted by Vartika Pandey 5 years ago

CBSE > Class 10 > Science

1 answers

Vartika Pandey 5 years ago

Please send me the answer

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Diagnose and research genetic disorders

Posted by Tejomurthula Sai Sathvika 5 years ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years ago

Genes are the basic unit of heredity. They hold the genetic information in the form of DNA which can be translated into useful proteins to carry out life processes. These genes undergo a mutation sometimes, which changes the instructions to formulate the protein, due to which the protein does not work properly. Such disorders are known as genetic disorders.

Some disorders are innate, i.e., present by birth, while others are acquired due to mutations in a particular gene.

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Use Mendeleev's periodic Table to predict the formula for the oxides of the following elements: K, C, Al, Si, Ba Give me answer

Posted by Gupta Binita 5 years ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years ago

The element K is in I group of Mendeleev's periodic table in which general formula is R₂O. So formula of oxide of K is K₂O
2.element C is in group IV of Mendeleev's periodic table .General formula of oxide is R₂O so formula of oxide is CO₂
3. Similarly oxide of Al is Al₂O₃.
4. Formula of Si oxide is SiO₂.
5. oxide of Ba is BaO

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We often use the word environment what does it mean

Posted by Shweta Rani 5 years ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years ago

Environment is the surrounding of a person or an object. Every thing including living and non living which is around you is a part of your environment.

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Anshika Sheoran Sheoran 5 years ago

It form by interaction of living and non-living organismd

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What is accent if sap?

Posted by Aziz Fatima 5 years ago

CBSE > Class 10 > Science