Question

Assertion$\left(A\right)$: In the frame of reference where all the considered charges are at rest, the force experienced by a moving test charge due to all considered charges is purely electrical in nature.

Reason$\left(R\right)$: A stationary charge produces an electric field only.

Select the most appropriate answer from the options given below

• A. Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
• B. Both $A$ and $R$ are true but $R$ is not the correct explanation of $A$
• C. $A$ is true but $R$ is false
• D. $A$ is false and $R$ is also false

Answer 1

The correct option is A Both $A$ and $R$ are true and $R$ is the correct explanation of $A$

Moving charges can produce both electric and magnetic fields, while a stationary charge produces only an electric field on its surrounding region.

In the given frame of reference, where all the charges are at rest, only electric field would be present and hence the moving test charge will experience electrostatic force (which is purely electrical).

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(A\right)$ is the correct answer.