A positively charged glass rod is placed by near the cap of a positively charge electroscope. The divergence of the leaf is observed to
A
decrease
B
increase
C
remain the same
D
increase and collapse immediately
Verified Correct Answer: B.
Physical Principles & Numerical Solution
One of the uses of the Gold leaf electroscope is to test charges whether the charge is positive or negative. The gold-leaf electroscope tests the sign of the charge of an object. If an unknown charge is brought near to a charged electroscope and the leaf diverges more, the unknown charge is similar to the charge on the electroscope and vice versa.
Source: Myschool Past Questions Archive (Record #34229)