Concepts Of Physics MCQ Edition [Volume 2]PhysicsThe Nucleus

A magnetic field fails to cause deflection in

Options

Abeta-minus rays
B-rays
Cgamma rays
Dbeta-plus rays

Correct answer

C. gamma rays

Step-by-step solution

Gamma rays are high-energy electromagnetic waves and do not carry any charge. The magnetic force on a moving particle is given by F = q( v B ) . Since the charge q = 0 for gamma rays, the magnetic force acting on them is zero. Alpha rays are positively charged, beta-minus rays are negatively charged, and beta-plus rays are positively charged, so they all experience a magnetic force and are deflected. Therefore, a magnetic field fails to cause deflection in gamma rays.

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