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Compute the no. Of electrons passing per minute through an electric bulb of 60w,220v

Posted by Plaksha Jain 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Unnati Sharma 4 years, 2 months ago

Given :- Power (P) = 60 W Voltage (V) = 220 V Time (T) = 1 min = 60 Sec Charge of an electron (q) = 1.6 × 10⁻¹⁹ C To Calculate :- Numbers of electron (n) = ??? Formula to be used :- = I × T/Q ..... Eq (i) Solution :- Since in this equation/case we do not know the value of I, therefore our prime aim is to find the value of I using the formula, ⇒ I = P/V ⇒ I = 60/220 ⇒ I = 3/11 A Substituting this value of I and the value of t and in eq (i), we get ⇒ n = 3/11 × 60/1.6 × 10⁻¹⁹ ⇒ n = 180 × 10¹⁹/11 × 1.6 ⇒ n = 1.02 × 10²⁰ Electrons. Hence , the Numbers of electron (n) is 1.02 × 10²⁰ Electrons.

ANSWER

Should the resistance of an ammeter be low or high give reason

Posted by Master Gaurav 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

X Y 4 years, 2 months ago

The resistance of an ammeter should be low as if the resistance will be low then it will allow the current to pass through it then only it will be able to measure the current. so, an ammeter should be of zero resistance

Nisa Saini 4 years, 2 months ago

The resistance of an ammeter be low .an ammeter has to be connected series with the circuit to measure current. In case its resistances is not very low ita inclusion in the circuit will reduce current to be measured an ideal ammeter is one which has zero resistance ??

ANSWER

Define Nature of Light

Posted by Raj Pandey 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Nitin Tripathi 4 years, 2 months ago

There are two types of Nature of Light i.e., 1.Wave 2.Particles

T.Dharshan [Tds] 4 years, 2 months ago

Light is a transverse, electromagnetic wave that can be seen by the typical human. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum.

Abhi ... 4 years, 2 months ago

Nature of light means a ray of light passing through one medium to another medium

ANSWER

Activity 10.1

Posted by Pranav Sudheer 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Dewang Doye 4 years, 2 months ago

Aim : to study the formation of images by both sides of a large shining spoon Apparatus required :A large shinning spoon procedure : 1. Take a large shining spoon .Try to view your face in its curved surface . 2.Do you get the image ?Is it smaller or larger ? 3.Move the spoon slowly away from your face .Observe the image .How does it change? 4. Reverse the spoon and repeat the activity. How does the image look like now ? 5.compare the characteristics of the image on the two surfaces. Observations and Conclusions : First we view our face from the surface of the spoon that is curved inwards. It acts like a concave mirror .Initially the image formed is erect and enlarged and then gets inverted and begins to reduce in size as the face is moved away from the spoon. Next we view our face from the surface that bulges outwards .It behaves as a convex mirror. It forms erect and smaller image of the face , irrespective of our distance from the spoon. (Hint: Golden science guide class 10 it has been provided with all activities and their solutions .I hope it will help you ??

Mayank Choudhary 4 years, 2 months ago

NCERT Book m h dekh la

ANSWER

What is double frtilistion process

Posted by Himanshu Gurjar 4 years, 2 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Magnetic lines of force inside current carrying solenoid are (a) perpendicular to axis (b) along the axis and are parallel to each other (c) parallel inside the solenoid and circular at ends (d) circular

Posted by Bhumika .. 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Akanksha Kumari 4 years, 2 months ago

B parallel to each other

X Y 4 years, 2 months ago

Parallel to each other

Adithya Dev A 4 years, 2 months ago

b) along the axis and are parallel to each other (I believe).

Farzana Abdulla 4 years, 2 months ago

Circular

ANSWER

Short notes on blood

Posted by Shivapriya Shivapriya 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Ramesh Gupta 4 years, 2 months ago

Sorry for this but blood has only two components Plasma and blood corpuscles Blood corpuscles contains other parts of the blood like RBC WBC platelets

Adithya Dev A 4 years, 2 months ago

Blood is a fluid connective tissue which acts as the primary medium for transportation in the human body (secondary is lymph). About 94% - 95% of the blood is made up of a fluid like substance called PLASMA (matrix of blood) which consist of proteins and has the same colour as straw (yellow to dark yellow with brown tinge) and is responsible for transport of CO2, nitrogenous waste materials, hormones, nutrients and many other substances. The remaining 5% is made of solid components ie, RBCs, WBCs and platelets. Red blood cells (red due to haemoglobin) help in transport of O2 and do not have a nucleus. White blood cells act as soldier cells protecting human body from pathogens. Whereas, platelets form networks in order to plug leaks in the blood vessels ie, BLOOD CLOTTING.

Tanishka Khatri 4 years, 2 months ago

Blood is a fluid present in the body .It is made up of RBC -red blood cells ,WBC -white blood cells , plasma , platelet . It helps in the process of transportation, blood transports oxygen and food to body parts and transports carbon dioxide and waste to the heart .

Sneha Bhardwaj 4 years, 2 months ago

Blood is a liquid fluid of red colour .It is a connective tissue.It has 4 components- RBC,WBC ,plasma, platelets

ANSWER

Hi kya hain

Posted by Ankit Verma 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Adithya Dev A 4 years, 2 months ago

Did you mean HIV?

Mayank Choudhary 4 years, 2 months ago

Matlab????????¿??????¿?¿??¿????

ANSWER

Which is the best book for class 10 science

Posted by Mayand Saini 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Ramesh Gupta 4 years, 2 months ago

Foundation(bharti bhawan) is best in my opinion

Kirtika Kaushik 4 years, 2 months ago

NCERT and Ulike ?

Sneha Bhardwaj 4 years, 2 months ago

Ncert, Deepak science guide

Kushal Sethi 4 years, 2 months ago

Ncert

ANSWER

A negative sign in magnificatoon is taken as

Posted by Keerthika Dhanam 4 years, 2 months ago

CBSE > Class 10 > Science

5 answers

Adithya Dev A 4 years, 2 months ago

Formation real and inverted image. Hope it helps you ?

Kirtika Kaushik 4 years, 2 months ago

In concave mirror and lens focal length is negative and I n both convex mirror and lens focal length is positive and u ( distance of the object) is always negative

Avula Satwika 4 years, 2 months ago

Is it in mirror or lens?

Anthony Samson 4 years, 2 months ago

Babababa

Alby Gijojoy 4 years, 2 months ago

Concave mirror

ANSWER

Practice

Posted by Mohit Pandat 4 years, 2 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

An electric iron has a rating of 750w 0v calculate the current required resistance of heating element and energy consumed in 2hours

Posted by Shivang Chugh 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Sehajdeep Singh 4 years, 2 months ago

64.53 kj

Govind Upadhyay Shash 4 years, 2 months ago

Bhai mujhe aata hai

ANSWER

Compound And formula chemistry ka

Posted by Priti Kumari Kumari 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Aman Naik 4 years, 2 months ago

Sampark krne ke liye arsalanfudi@gmail.com Par Mail kare

Aman Naik 4 years, 2 months ago

Homework or padhai karne ka sahi tips and tricks ★- Harne wale ki salhaa . ★- Jeetne wale ka Anabhav . ★- Aur khud ka dimag . ★- Insaan ko kabhi Harne nahin deta .....

Aman Gupta 4 years, 2 months ago

What

Tanu Srivastava 4 years, 2 months ago

What??

ANSWER

Reactions Balancing

Posted by Rayyan Siddiqui 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Nitin Tripathi 4 years, 2 months ago

Reaction balancing is equation in which we have to balance the reactants and product

ANSWER

Why are forest's considered biodiversity hotspots suggest four approaches towards conservation of forests

Posted by Khushi Gharat 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Kirtika Kaushik 4 years, 2 months ago

In which ch if is in geo ch 2 it is deleted by cbse

ANSWER

Why insulators are as important as conductors?

Posted by Tarunpreet Singh💯💯 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

Conductors are the substance which alow to pass heat through them easily so they are called conductors and if insulators i.e the substances which do not alow to pass hheat through them ate called insulators , if only cnnductors were there then we would absorb more heat leading to cause of burning so insulators as a kind protect us by equalizing the tempetature. Some conductors are :- silver ,copper,iron ,aluminium and mercury. Some insulators are:- wood , plastic , mud, cork , cotton , wool .

ANSWER

Burning Of Candle and melting of candle is Chemical change or physical Change?

Posted by Ankit Kumar 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Ankit Kumar 4 years, 2 months ago

Thank you so much

Rifsana Iqbal 4 years, 2 months ago

Burning of candle = chemical change. Melting of candle=physical change.

Yunus Lm 4 years, 2 months ago

burning of candle-chemical change melting of candle -physical change

ANSWER

Which chapter is hardest chapter in class 10 Science ??

Posted by Mohit Chauhan 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Ansh Shrivastava 4 years, 2 months ago

Bc chemistry saari mushkil h

Fallen Warrior 4 years, 2 months ago

Light and Acids and bases

Harshit Chauhan 4 years, 2 months ago

Heredity and evolution ?????????????? Chemical rxns

Santhosh Sandhiya 4 years, 2 months ago

Life Process and Light

ANSWER

Which chapter in class 10 Science

Posted by Mohit Chauhan 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Mayand Saini 4 years, 2 months ago

Please write a proper questions

Gouri 15 4 years, 2 months ago

Magnetic effect of current is the hardest chapter

Tanu Srivastava 4 years, 2 months ago

Carbon and its compound is the most hardest chapter in science... Otherwise all chapters are too easy pizzy lemon squizy... I have completed my all the syllabus but still I have a lot of problems in carbon and its compound..

Rifsana Iqbal 4 years, 2 months ago

?

ANSWER

How do we convert 150 mA into A current

Posted by Soumya Singhal 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Rifsana Iqbal 4 years, 2 months ago

150mA=15×10^-3

Harshit Chauhan 4 years, 2 months ago

1ma =10-³ a So by this you can convert

Ankit Kumar 4 years, 2 months ago

150/1000 =0.15A

ANSWER

Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans

Posted by Mansi Sharma 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Adithya Dev A 4 years, 2 months ago

Diffusion, in multicellular organisms, is not enough to meet energy requirements of innermost cells of its body, as O2 reaches those cells gradually through this method.

Man Mohan Singh 4 years, 2 months ago

Because human has a very complex body structure and it take nearly 3 years to transfer o2 from heart to legs.

Ayan Patel 4 years, 2 months ago

Size of multicellular organism is very large as compare to unicellular organism and diffusion is passive mode of transportation of substance and can transfer gases up to a small distance only

Tanu Srivastava 4 years, 2 months ago

Because multicellular organisms has complex working systems which need more energy(oxygen) at a time where as diffusion is a very slow process which can't be able to fulfill the needs of sufficient oxygen to the body

ANSWER

Short note on food web

Posted by Oav Papadahandi 4 years, 2 months ago

CBSE > Class 10 > Science

5 answers

Oav Papadahandi 4 years, 2 months ago

Ok thqs? both of you

Mamta ... 4 years, 2 months ago

he has just asked short note that's y I wrote in short only what uhh have written is also correct.

Tanu Srivastava 4 years, 2 months ago

A food web consists of many food chains.Food webs describe the relationships — links or connections — among species in an ecosystem, but the relationships vary in their importance to energy flow and dynamics of species populations. Some trophic relationships are more important than others in dictating how energy flows through ecosystems.

Tanu Srivastava 4 years, 2 months ago

This much is not sufficient mamta

Mamta ... 4 years, 2 months ago

A food web consists of many food chains. Food webs show how plants and animals are connected in many ways.

ANSWER

Write the uses of baking soda

Posted by Shivanand Bannannavar 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Mamta ... 4 years, 2 months ago

1. Whiten your teeth.......2. Relieve itchy skin and sunburns.......3.improve certain cancer treatments.......4. Air freshener

Jay Mahajan 4 years, 2 months ago

1. Baking soda is used as a soda fire extinguisher 2. Baking soda is is also an ingredient in antacids. Being alkaline, it neutralises the excess acid in the stomach and provides relief 3. Baking powder, which is the mixture of baking soda and mild edible acid such as tartaric acid. When baking powder is heated or mixed in water CO2, water and sodium salt of acid is produced. Carbon dioxide produced during this reaction causes bread or cake to rise making them soft and spongy

Oav Papadahandi 4 years, 2 months ago

Uses of Baking Soda ?.Reduces the acidity in the stomach. ?.Acts as an antacid which is used to treat stomach upset and indigestion. ?.Used in the process of washing as a water softener. ?.Due to the formation of soapy foam, it is used in fire extinguishers. ?

ANSWER

Aaplog koi side book use krte ho kya science ke liye??

Posted by Tanu Srivastava 4 years, 2 months ago

CBSE > Class 10 > Science

5 answers

Tanu Srivastava 4 years, 2 months ago

Yes mamta I also prefer to use S Chand.. In which school do you read dear?

Tanu Srivastava 4 years, 2 months ago

Which one??

Mamta ... 4 years, 2 months ago

yes I use S Chand

Soumya Sahu 4 years, 2 months ago

Yes.......

Oav Papadahandi 4 years, 2 months ago

Yeh

ANSWER

Tracing the path of ray of light passing through a rectangular glass slab

Posted by Punam Patel 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Ricky Tomar 4 years, 2 months ago

It form in 7 colour

ANSWER

Lithium sulfane beryllium phosphide magnesium hydroxicie sodium phosphate aluminum carbonate calcium chloride sodium cyanide aluminum oxide magnesium acetate ammonium chloride nitrogen trichloride boron carbide dinitrogen trioxide phosphorus pentafluoride methane sulfur dibromide diboron tetrahydride Oxygen difluoride carbon dioxide nitrogen monoxide potassium iodide magnesium oxide aluminum chloride Formulas ^

Posted by Yug Gaikwad 4 years, 2 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Which of the following is a non renewable sources of energy

Posted by Chetan Bestha 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Harshit Chauhan 4 years, 2 months ago

Coal , petroleum

Oav Papadahandi 4 years, 2 months ago

Option Kaha h?

ANSWER

Which material burned magnesium ribbon can be cleaned?

Posted by Mukesh Sapooniya 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Mayand Saini 4 years, 2 months ago

Sandpaper

Kaku Sharaya 4 years, 2 months ago

Magnesium oxide

ANSWER

State the role played by the following in the process of digestion.(A) Enzyme trypsin (B) Enzyme lipase

Posted by Atharv Verma 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Vivek Jayakumar 4 years, 2 months ago

Trypsin is an enzyme secreted by pancreas. It breaks down protiens. Lipase is another enzyme secreted by pancreas which acts on emulsified fat.

Mamta ... 4 years, 2 months ago

Enzyme trypsin- digest proteins..... Enzyme lipase- Breakdown emulsified fats.

Khushi 4 years, 2 months ago

✿Enzyme Trypsin: The pancreas secretes pancreatic juice which contains enzymes like trypsin for digesting proteins. ✿Enzyme Lipase: The pancreas secretes pancreatic juice which contains enzymes like lipase for breaking down emulsified fats.

ANSWER

What is biot savart law From chapter magnetic field Told me this is in syllabus or no

Posted by Anuradha Chaudhary 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Anuradha Chaudhary 4 years, 2 months ago

Please answer

Mamta ... 4 years, 2 months ago

No

ANSWER

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