Question

A large non-conducting sheet $\text{M}$ is given a uniform charge density. Two uncharged small metal rods $\text{A}$ and $\text{B}$ are placed near the sheet as shown in figure. Which of the following options is incorrect?

• A. $\text{M}$ attracts $\text{A}$
• B. $\text{M}$ attracts $\text{B}$
• C. $\text{A}$ attracts $\text{B}$
• D. $\text{B}$ repels $\text{A}$

Answer 1

The correct option is D $\text{B}$ repels $\text{A}$

Charges will be induced in the small metal rods $\text{A}$ and $\text{B}$ due to the large non-conducting sheet $\text{M}$. The charge distribution is as shown in figure.


From the figure, we can conclude that
$\left(1\right)\text{M}$ attracts $\text{A}$
$\left(2\right)\text{M}$ attracts $\text{B}$
$\left(3\right)\text{A}$ attracts $\text{B}$

Hence, statement in option (d) is incorrect.