NEET Physics Question - Magnetic Effects of Current

Assertion (A): A charged particle is moving in a circle with constant speed in uniform magnetic field. If we increase the speed of particle to twice, its acceleration will become four times.

Reason (R): A charge particle in circular path with constant speed in magnetic field, acceleration is given by centripetal acceleration. If speed is doubled centripetal acceleration will become four times.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

The centripetal acceleration for a charged particle in a magnetic field is \( a = frac{qvB}{m} \). If speed \( v \) is doubled, then acceleration \( a \) will also double, not quadruple. So, Assertion (A) is false. Similarly, in this context, Reason (R) is also false. Thus, both are false.

Rankers Physics

Motion of Charged Particle in Magnetic Field

Solution:

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