Question

$\bold \color{red}{question : }$


I was doing a project for my school: 'Electroscope'. But when I take a charged PVC pipe nearer to the metal rod, the leaves don't repel.

Can you tell me why it's not repelling?
question:



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1) No Spam.

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2) Give quality reasons for why the leaves are not repelling!​

Answer 1

$\Large\text{\underline{The electroscope has a charge.}}$

$\Large\text{\underline{The object has the same charge with the PVC pipe.}}$

$\Large\text{\underline{\underline{Crucial concepts}}}$

We know that -

charged leaves repel, and uncharged the leaves don't repel.

We know that -

the electrons can move from the ground to the metal plate through the body. The electroscope attains the opposite charge of the object.

$\Large\text{\underline{\underline{Explanation}}}$

When the number of electrons is balanced, the leaves have an opposite charge to the metal plate. However, this did not happen, which means the number of electrons is unbalanced. (The electroscope is charged.)

We know that -

the electroscope attains the opposite charge of the object.

So,

The leaves repel when the charges are the opposite.

The leaves don't repel when the charges are the same.

This leaves us the second case.

$\Large\text{\underline{\underline{Extra information}}}$

To make the electroscope have a charge, while a charged object is near, let our body act as a ground.

We know that -

the metal plate attains the opposite charge of the object.

Now, we can test if the charge of any two objects is the same or not.

If leaves repel, the two charges are the opposite.

If leaves don't repel, the two charges are the same.

$\Large\text{\underline{\underline{Terms}}}$

Electroscope: A device that detects the charge of an object.

Charge: A state of having an unbalanced number of electrons. Positive in lack of electrons, negative in too many electrons.

Ground: A path for the electrons to go through the ground to prevent a short circuit. (Example: lightning rod, electric equipment.)