Assertion and Reason on Charged Particle Motion in Electric Field – Rankers Physics

Electric Field Lines: Practice Problem & Solution

Assertion (A): If a charge is released from rest in an electric field, it will always move along an electric field line. Reason (R): Force on a charged particle is always in the direction of electric field.  
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

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Electric Field Lines. Understanding the underlying formula is key to arriving at the correct answer below:

Assertion (A) is false; a particle released from rest follows a field line only if it is straight. If the field line is curved, inertia causes deviation. Reason (R) is false; for a negative charge, the force \(\vec{F} = q\vec{E}\) is opposite to the electric field \(\vec{E}\). Thus, both A and R are false.

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