You are provided with a negatively charged gold leaf electroscope. State and explain what happens when an ebonite rod rubbed with fur is brought near the disc of electroscope.

divergence increases

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divergence decreases

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divergence remains same

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can't say

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Solution

The correct option is A divergence increases
On rubbing an ebonite rod with fur, the electrons from the fur get transferred to the ebonite rod. The fur now has a deficiency of electrons and so is positively-charged. On the other hand, the ebonite rod has an excess of electrons and hence is negatively-charged.
In the above case, the fur undergoes positive electrification.
Now, when the negatively charged ebonite rod is touched on the disc of a negatively charged gold leaf electroscope, the divergence between the gold leaves increases as like charges repel each other.
Hence, the divergence increases when an ebonite rod rubbed with fur is brought near the disc of negatively charged electroscope.

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Similar questions

A glass rod rubbed with silk is brought near the disc of a negatively charged gold leaf electroscope. The divergence of its leaves will :

Write true or false for each statement:

(a) The number of electrons and protons in an atom are same.

(b) If the charge is not in motion, we call it static electricity.

(d) When an ebonite rod is rubbed with fur, the electrons move from ebonite to fur.

(e) When a glass rod is rubbed with the dry silk cloth, the electrons move from glass to silk.

(f) The cap of gold leaf electroscope is made of copper.

(g) If a glass rod rubbed with silk is brought near the cap of a negatively charged electroscope, the divergence of leaves will decrease.

(h) In induction, a positively charged body can make an uncharged body positively charged.

(i) A lighting conductor saves the building from lighting.

(j) When a comb is rubbed with dry hair both comb and paper get similarly charged.

(k) A glass rod rubbed with silk repels an ebonite rod rubbed with fur.

(l) When an ebonite rod is rubbed with fur, the protons move from the ebonite rod to the fur.

(m) A conductor has a large number of free electrons.

(n) An ebonite rod can be charged by touching it with a charged copper rod.

(o) To find whether a body is charged or not, an uncharged electroscope is used.

(p) To find whether the charge on a body is positive or negative, an uncharged electroscope is used.

(q) If a negatively charged rod is brought near a negatively charged pith ball electroscope, the pith ball will be stuck with the rod.

A negatively charged ebonite rod is touched with the disc of a negatively charged gold leaf electroscope. What will be your observation?

Fill in the blanks:

(a) Like charges ___ while unlike charges ___.

(b) Mercury is a ___ of electricity while pure water is ___ of electricity.

(d) When an uncharged conductor is brought in contact with the disc of a gold leaf electroscope, it leaves ___.

(e) Charge is shared in charging a conductor by the method of ___.

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