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Physics-Magnetic Force on Current

NEET Physics Magnetic Force on Current MCQ Question

Type: MCQ-diagram based-Easy-Class 12

Consider a straight wire of length ll carrying a current II placed in a uniform magnetic field B⃗\vec{B}. Which of the following expressions correctly represents the magnetic force F⃗\vec{F} acting on the wire?

Question diagram
A

F⃗=Il×B⃗\vec{F} = I l \times \vec{B}

B

F⃗=Il⋅B⃗\vec{F} = I l \cdot \vec{B}

C

F⃗=IB⃗×l\vec{F} = I \vec{B} \times l

D

F⃗=IB⃗⋅l\vec{F} = I \vec{B} \cdot l

Correct Answer

Option A

Detailed Explanation

According to the NCERT context, the magnetic force on a current-carrying wire is given by F⃗=Il×B⃗\vec{F} = I l \times \vec{B}, where ll is a vector in the direction of the current.

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