Physics-Magnetic Force on Current
NEET Physics Magnetic Force on Current MCQ Question
Type: MCQ-numerical-Easy-Class 12
A wire 3.0 cm long carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is 0.27 T. What is the magnetic force on the wire?
A
0.081 N
B
0.0810 N
C
0.810 N
D
0.0081 N
Correct Answer
Option A
Detailed Explanation
The magnetic force on a current-carrying wire is given by F = I L B sin θ. Here, I = 10 A, L = 0.03 m, B = 0.27 T, and θ = 90° which makes sin θ = 1. Thus, F = 10 × 0.03 × 0.27 = 0.081 N.
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