Question from Electrostatics

A charge ‘q’is placed at the centre of the line joining two equal charges Q.The system of 3 charges will be in equilibrium, if ‘q’is equal to; a)-Q/2 b)-Q/4 c) Q/2 d) Q/4   Asked Fayas Babu K   The answer is (b)  – Q / 4 For the three charges to be in equilibrium, the […]

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Can the frictional electricity produced during landing of a plane be used for constructive purposes?

As we know that in aeroplane during landing the charged produced in it due to the friction with ground are earthed through its wheels; can this charge be stored with the help of a capacitor and used for useful purpose? Answer: I feel that this is a metter for research. If you feel otherwise and […]


Physics Project Help

I have to make a Physics project on the topic- “to estimate the charge induced on each one of the two identical styro foam(or pith) balls suspended in a vertical plane by making use of coulombs law.” Please tell me how should i make it. Please help me. (Requested by Sasha Grover. Expect a response […]


Calculating charge on a body with excess of electrons

How would I calculate the charge on a small sphere with an excess of 5.0 x 10 14 electrons? Asked Kaitlin Thomas Answer: We know that charge on an electron is (-) 1.6 x 10-19 C If the sphere has 5.0 x 10 14 electrons in excess then the body has a net negative charge […]

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How was your Physics Practical Examination?

Hello students! It’s the time of AISSCE Practical Examination. How was your Physics Practical Examination and Viva? Which questions were asked to you? Which were the experiments and activities you were asked to perform? How farely did you do it? Share your experience here as comments to this post. Your responses will be a boon […]

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Class 12 Physics : Electrostatics Revision Test

Max marks:50 Time:2hrs A glass rod rubbed with silk acquires a charge of 6×10-12 C. Calculate the number of electrons it has gained or lost. (1) If the magnitude of each charge becomes doubled, the separation between them is halved and the system of charges kept in a medium of=3 Calculate the force between them. […]

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How atoms are formed? – Neeraj Asks

Neeraj asks: ”We have read that atoms can neither been created nor been destroyed!I want to know from where atoms came in existence,if they can not been created,also atom contain electron and proton which are negatively and positively charged,i want to know from where these charge came?”
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