Question

Assertion (A): Alpha and beta particles are deflected in an electric or a magnetic field, but gamma rays are not deflected in such a field.

Reason (R): Alpha and beta particles are charged but gamma rays are uncharged.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

Explanation:

Alpha particles are positively charged and beta particles are negatively charged, so an electric or magnetic field exerts a force on them and deflects them. Gamma rays are uncharged electromagnetic waves, so they are not deflected. Thus Reason (R) correctly explains Assertion (A).