Statement I: Speed of a negatively charged particle decreases while moving in the direction of an electric field.
Statement II: A positively charged particle moving in the direction of an electric field experience acceleration.
In the light of the above statement, choose the correct answer from the options given below.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Both statement I and statement II are true
The force on a charge in an electric field is \( \vec{F} = q\vec{E} \): along \( \vec{E} \) for a positive charge and opposite to \( \vec{E} \) for a negative charge.
Statement I Speed of a negatively charged particle decreases while moving in the direction of an electric field. — True. For a negative charge the force is opposite to the field. If the particle moves along the field, the force opposes its motion, so it decelerates and its speed decreases.
Statement II A positively charged particle moving in the direction of an electric field experience acceleration. — True. For a positive charge the force is along the field, which is the direction of motion, so the particle is accelerated.