Physics Practice Test – Electric Charges (Questions with Answers and Explanations)

If negative charges are induce on an electroscope and a positively charged rod is brought near the cap of the electroscope, the leaves will _____ (JAMB 2009)

A. close up   
B. become positively charged
C. become negatively charged
D. open further

Which of the figures below shows the correct distribution of charges on an isolated positively charged hollow metal?

An ebonite rod rubbed with fur attracts a glass rod rubbed with silk because _____

A. ebonite has a negative charge while glass has a positive charge
B. ebonite has a positive charge while glass has a negative charge
C. both have negative charges
D. both have positive charges.

In the diagram above, the charges on X and Y are opposite. What happens when they are in contact? (JAMB 2015)

A. X and Y become negatively charged.
B. X and Y attract each other.
C. X and Y become positively charged.
D. X and Y repel each other.

If an ebonite rod is rubbed with fur, it is true that ______ (JAMB 2020)

A. the fur will acquire positive charges while the rod will acquire negative charges
B. the fur will acquire negative charges while the rod wilt acquire positive charges
C. both the fur and the rod will acquire positive charges
D. both the fur and the rod will acquire negative charges