CBSE > Class 10 > Science | CBSE Board | Homework Help

Electric current used by our home is 50 Hertz and the appliances are connected in parents so , it give same voltage Some appliances used dc current like television,radio, device convert AC current into Dc . Our home 220 volt current is supplies through transformer.

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Md Sohail 2 years, 8 months ago

1Thank You

Aditi Sharma 2 years, 8 months ago

1. Electric current used in our homes is AC current with are converted in DC current by adaptors or appliances 2. It is connected in a parallel combination 3. Voltage remains the same across the appliances

3Thank You

Pushkar Pahwa 2 years, 8 months ago

Fuse Earth wire

1Thank You

ANSWER

Define ohm,s law

Posted by Ranjan Rakshap 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Bhavnoorpreet Kaur 2 years, 8 months ago

Ohm`s law states that current which flows in conductor is directly proportional to potential difference

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Harshit Kumar 2 years, 8 months ago

According to ohm's law , potential difference (voltage) is directly proportional to the current when the physical properties of materials and temperature remains same or constant.

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Shreya Sharma 2 years, 8 months ago

Ohm's law state that current flowing in the conductor is directly proportional to p.d at a constant temperature.

1Thank You

Omya Aryan 2 years, 8 months ago

According to Ohm's law, the voltage across a conductor is directly proportional to the current flowing through it providing all physical conditions remain constant.

2Thank You

Vedant Prabhu 2 years, 8 months ago

At constant temperature, the current flowing through the conductor is directly proportional to its potential difference across its ends.

1Thank You

ANSWER

Does glucose have ions

Posted by Vengaladasu Prudhvi Raj 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Shivam Sharma 2 years, 8 months ago

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Shamitha Mk 2 years, 8 months ago

Yes they have hydrogen ions but still they are not considered as acids

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Deepak Sharma 2 years, 8 months ago

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Chukameka Nani 2 years, 8 months ago

No ions

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A B 2 years, 8 months ago

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ANSWER

Barium chloride + Aluminium sulphate=Barium sulphate + Aluminium chloride

Posted by Daksh Jain 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Anita Singh 2 years, 8 months ago

Bacl+Also4=baso4+Alcl2 double displacement reaction

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Bhavnoorpreet Kaur 2 years, 8 months ago

BaCl+ AlSo4----> BaSO4 which is precipite and AlCl2 will form

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Vranda Mundra 2 years, 8 months ago

It is also a precipitation reaction....barium sulphate is the precipitate

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Omya Aryan 2 years, 8 months ago

BaCl2 + AlSO4 -----> BaSO4 + AlCl2

1Thank You

Sanjay Selvakumar 2 years, 8 months ago

It is a double displacement reaction.

1Thank You

ANSWER

How to cover whole syllabus in 1 hr?

Posted by Nikita Jangid 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Aanya Rai 2 years, 8 months ago

Make a copy for quick revision

0Thank You

Ayush Mishra 2 years, 8 months ago

Like robot

1Thank You

Ankush Pandey 2 years, 8 months ago

By enjoying ur self bro😊

2Thank You

Sanjay Selvakumar 2 years, 8 months ago

Make mind maps,

1Thank You

Shubham Jha 2 years, 8 months ago

By can't study

1Thank You

ANSWER

Palmonary atries

Posted by संदीप कुमार 2 years, 8 months ago

CBSE > Class 10 > Science

4 answers

A B 2 years, 8 months ago

Pulmonary artery carry deoxygenated blood from heart to lungs for oxygenated....

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Vranda Mundra 2 years, 8 months ago

Carries deoxygenated blood

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Vipan Kaur 2 years, 8 months ago

Pulmanory artery carry deoxygenate blood from heart to lungs

2Thank You

Omya Aryan 2 years, 8 months ago

Pulmonary artery carry deoxygenated blood from the body to the heart and then it is transferred to lungs for the oxygenation.

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ANSWER

What are genes?where are the genes located

Posted by Nitin Singh 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Ahiya S 2 years, 7 months ago

Gene consist of DNA

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Nitin Singh 2 years, 8 months ago

Thanks

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Harshit Kumar 2 years, 8 months ago

Genes are hereditary unit that helps to transfers the characteristics of parents to their offsprings or next generation , like we see that style of walking of parents similar to their children , this is due to the genes . Genes are present in chromosome that can be seen when cell have to divide and chromatid material condense into chromosomes .

1Thank You

Piyush Verma 2 years, 8 months ago

Sorry genes are the unit of heredity. Mistype

3Thank You

Piyush Verma 2 years, 8 months ago

Genes are the unit of humidity. It is the segment of the DNA on the chromosome that works in a pair and governs the synthesis of a protein that is ultimately responsible for controlling a particular character. Location of gene Cell--Nucleus----Chromosome-----DNA---Gene(A segment of DNA).

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ANSWER

What would be the consequences of a deficiency of hemoglobin in our bodies ?

Posted by Pooja Gour 2 years, 8 months ago

CBSE > Class 10 > Science

3 answers

Ambika Venkat 2 years, 8 months ago

Anemia

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Saksham_Jain_9Th_E Jain 2 years, 8 months ago

Deficiency of haemoglobin in blood will lead to less supply of oxygen due to which organisms don't get enough energy for daily activities....

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Aisha Naved 2 years, 8 months ago

Deficiency of haemoglobin will lead to slow functioning of the body as well as weakness due to less supply of oxygen

3Thank You

ANSWER

What is precipitates

Posted by Kushank Raj 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Mr Thunder 2 years, 8 months ago

insoluble substance..

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Vipan Kaur 2 years, 8 months ago

Insoluble substance formed in liquid solution

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V R 2 years, 8 months ago

Precipitation those reaction in which insoluble substance is stelled down which is insoluble in nature that is called precipitation

0Thank You

Lakhi Saw 2 years, 8 months ago

Insoluble in emerge liquid solutions is called precipitate

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Ewan Bobby 2 years, 8 months ago

Insoluble solids in a liquid solution formed after a chemical reaction

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ANSWER

What is oestrogen

Posted by Ayush Kumar 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

V R 2 years, 8 months ago

1 Oestrogen is a hormone in female. 2 It produce eggs. 3 it is useful in reproduction in female 4 it is a part of mensuration cycle.

2Thank You

Lakhi Saw 2 years, 8 months ago

The oestrogen is a female reproductive hormone.

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Laxmi Atar Laxmi Atar 2 years, 8 months ago

It is a female harmone

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Chand Sn 2 years, 8 months ago

Oestrogen is one of the main female *** hormones. It is needed for puberty, the menstrual cycle, pregnancy, bone strength and other functions of the body. Oestrogen levels vary throughout the menstrual cycle and fall after menopause. Having too much oestrogen can increase your risk of blood clots and stroke.

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Chand Sn 2 years, 8 months ago

It is a female reproductive part

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ANSWER

Why copper become green during rainy day?

Posted by Account Deleted 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Mr Thunder 2 years, 8 months ago

it react with atmospheric gases likhe CO² to form CaCO³,CaOH which is green in colour..

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Bhavnoorpreet Kaur 2 years, 8 months ago

Cu react with atompsheric gases and moist air to form CuCo3

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Vipan Kaur 2 years, 8 months ago

Cu on reacting with moist CO2 ,it form a layer of green CuCo3 on it

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V R 2 years, 8 months ago

It form CuCo3 when it react with moist air in rainy day that why it lose it colour

0Thank You

Laksh Singh 2 years, 8 months ago

Copper react with moist carbon dioxide in the air and slowly loses its shiny brown surface and gain a green coat

4Thank You

ANSWER

Define linear magnification produced by a mirror

Posted by Saurav💯 Joshi📓📕 2 years, 8 months ago

CBSE > Class 10 > Science

3 answers

Aisha Naved 2 years, 8 months ago

the ratio of the size of the image formed by the mirror to the size of the object. Basically magnification

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Kiran Rawat 2 years, 8 months ago

Janhavi singh

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Account Deleted 2 years, 8 months ago

Linear magnification of mirror is m= -v/u = hi/ho

2Thank You

ANSWER

What is the atomic no of carbon

Posted by Sayam Jain 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Laxmi Atar Laxmi Atar 2 years, 8 months ago

06 is a atomic number of carbon

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Soofiya Khan 2 years, 8 months ago

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Abhishek Daive 2 years, 8 months ago

1Thank You

Saurav💯 Joshi📓📕 2 years, 8 months ago

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Vaidik Tripathi 2 years, 8 months ago

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ANSWER

Why a beam of light is bends towards normal when it goes rarer to denser medium

Posted by Sneh Singh 2 years, 8 months ago

CBSE > Class 10 > Science

3 answers

Mr Thunder 2 years, 8 months ago

dense to rearer

0Thank You

Saurav💯 Joshi📓📕 2 years, 8 months ago

Due to the variation in density of the two mediums

3Thank You

Vaidik Tripathi 2 years, 8 months ago

Because of the variation in density of the two mediums

4Thank You

ANSWER

Give reason - hydrogen gas is not evolved when most of the metals react with nitric acid

Posted by Twin Leaf 2 years, 8 months ago

CBSE > Class 10 > Science

4 answers

Vipan Kaur 2 years, 8 months ago

Nitric acid is a strong oxidizing agent .When hydrogen gas is produced it react with water and nitric acid reduced ourself

1Thank You

Daksh Jain 2 years, 8 months ago

Strong oxidising agent

1Thank You

Prabhodhan M 2 years, 8 months ago

Nitric acid is a strong oxidizing agent. When a metal reacts with nitric acid the hydrogen gas produced immediately gets oxidized to produce water. However very dilute nitric acid produces hydrogen gas on reacting with a metal

2Thank You

Dev Sharma 2 years, 8 months ago

Nitric acid is strong oxidising agent . They oxidised h2 gas produce water.

1Thank You

ANSWER

What is parts of brain

Posted by Nitin Singh 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Saksham Agrawal 2 years, 8 months ago

Three parts of brain Forebrain Midbrain Hindbrain

2Thank You

Saurav💯 Joshi📓📕 2 years, 8 months ago

Fore brain , mid brain , hind brain ,cerebellum , medula ,cerebrum

1Thank You

Dev Sharma 2 years, 8 months ago

Fore brain, mid brain, hind brain- medulla, cerebellum, pons

0Thank You

Abdeali Harianawala 2 years, 8 months ago

Mid brain

0Thank You

Om Sagar Vishwakarma 2 years, 8 months ago

Thare are 3 part in brain 1. Fore brain 2. Mid brain 3. Hind brain

2Thank You

ANSWER

Ch 1 activities notes

Posted by Ashi Ashi 2 years, 8 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Activity 13.4 n Take a long straight copper wire, two or three cells of 1.5 V each, and a plug key. Connect all of them in series as shown in Fig. 13.5 (a). n Place the straight wire parallel to and over a compass needle. n Plug the key in the circuit. n Observe the direction of deflection of the north pole of the needle. If the current flows from north to south, as shown in Fig. 13.5 (a), the north pole of the compass needle would move towards the east. n Replace the cell connections in the circuit as shown in Fig. 13.5 (b). This would result in the change of the direction of current through the copper wire, that is, from south to north. n Observe the change in the direction of deflection of the needle. You will see that now the needle moves in opposite direction, that is, towards the west [Fig. 13.5 (b)]. It means that the direction of magnetic field produced by the electric current is also reversed.

Posted by Paras Jain 2 years, 8 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Hydrogen is not a metel but it has beena assigned a place in the reactivity series of metal? Why

Posted by Ayush Prasad 2 years, 8 months ago

CBSE > Class 10 > Science

4 answers

Saksham_Jain_9Th_E Jain 2 years, 8 months ago

Because it is electropositive in nature like all other metals..

0Thank You

Abhishek Daive 2 years, 8 months ago

Metal are electropositive they loose electron with other element whereas hydrogen is non metal but it has valency 1 it loose electron and act as electropositive like metal,due to this reason hydrogen is place in the reactivity series of metal

2Thank You

Om Sagar Vishwakarma 2 years, 8 months ago

Because. It act like metal ( it loose ē to make p+ charge )

1Thank You

Dev Sharma 2 years, 8 months ago

Maybe, because it has the power of displacing other metal and removing by other metal. This reason we can add hydrogen to reactivity series.

1Thank You

ANSWER

Explain the principle construction

Posted by Roshan Manekar 2 years, 8 months ago

CBSE > Class 10 > Science

2 answers

Preeti Dabral 2 years, 8 months ago

A superior ovary is found in types of fleshy fruits such as true berries, drupes, etc. A flower with this arrangement is described as hypogynous.

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Dev Sharma 2 years, 8 months ago

OUT OF CYLLABUS

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ANSWER

Reason for movement in an organism may be (a) responding to the changes in environment (b) to gain some advantage from the environment like getting sunlight (c) to protect themselves from damage (d) all of these.

Posted by Rounak Parveen 2 years, 8 months ago

CBSE > Class 10 > Science

3 answers

Mr Thunder 2 years, 8 months ago

All of the above

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Aisha Naved 2 years, 8 months ago

All of these

0Thank You

Dev Sharma 2 years, 8 months ago

Option A is correct

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ANSWER

That is ores

Posted by Riya Lama 2 years, 8 months ago

CBSE > Class 10 > Science

3 answers

Abhishek Daive 2 years, 8 months ago

Mineral contain high % of particular metal can be easily profitably extracted from it is called ore

1Thank You

Dev Sharma 2 years, 8 months ago

A natural occuring solid material in earth crust any where

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Mmmmmm Mm 2 years, 8 months ago

3Thank You

ANSWER

Which solution dissolved gold

Posted by Prem Patel 2 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Sadkeen Zarrin 2 years, 8 months ago

Aqua regia also called sahii paani

1Thank You

Anshika Singh 2 years, 8 months ago

Aqua regia

0Thank You

Omya Aryan 2 years, 8 months ago

Royal Water

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Riya Lama 2 years, 8 months ago

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1Thank You

Prem Patel 2 years, 8 months ago

Aqua regia

3Thank You

ANSWER

State the reason why carbon can neither form c^4+ cations nor c^4- anions but forms covalent compound

Posted by Vinay. L 2 years, 8 months ago

CBSE > Class 10 > Science

4 answers

Abhay Rana 2 years, 8 months ago

Because carbon is tetravalent and carbon have catenation

0Thank You

Abhishek Daive 2 years, 8 months ago

Carbon has 4 valence electron in it outermost shell to obtain noble gas configration it has to loss or gain 4 electron but it is not possible to hold 4 electron and loose 4 electron as it require lot of energy . So to obtain noble gas configration it form covalent bond and can neither form ....

1Thank You

Lakshay Takkar 2 years, 8 months ago

As carbon is tetravalent

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Krishna Chaudhary 2 years, 8 months ago

Due to unstability of neutron and size of carbon is very small it cannot gain 4e and become c4+ while require lot of energy to donate 4e- and become c4-

1Thank You

ANSWER

Write down the hormone secreted by pancreas and mention the function of each

Posted by Mohit Gurnani 2 years, 8 months ago

CBSE > Class 10 > Science