Biology Forums - Study Force

Science-Related Homework Help Physics Topic started by: Mohamud Nooh on Apr 19, 2022



Title: Charge, then brought near (i.e., within about 1/10 the length of the rod) to end A of the rod. What
Post by: Mohamud Nooh on Apr 19, 2022
A small metal ball is given a negative charge, then brought near (i.e., within about 1/10 the length of the rod) to end A of the rod. What happens to end A of the rod when the ball approaches it closely this first time?

A)strongly repelled
B)strongly attracted
C)weakly attracted
D)weakly repelled
E)neither attracted nor repelled


Title: Re: Charge, then brought near (i.e., within about 1/10 the length of the rod) to end A of the rod. ...
Post by: brown_02 on Apr 20, 2022
C)weakly attracted

Due to charging by induction, and negative charge on the small metal ball, the end A of the rod will acquire charge opposite to that of the metal ball. Hence the end A of the rod will acquire positive charge. Also, since opposite charges attract each other, the negative metal ball and the positive charge on the end A of the rod will attract each other.

But, since a small amount of positive charge will be induced hence the ball and end A of the rod will be weakly attracted.