Question

Solve previous year Question of iit jee
chapter :- magnetic effect of current​

Answer 1

Answer:

option b is correct answer

Hope you will be fine

Answer 2

Answer:

Option (a)

Explanation:

Magnetic field requires "W"unit of work to turn it through 60° .

• → W = MB ( 1 - cos60° )

• → W = MB( 1 - cos60° ) [ ∵ θ = 60°]

• → W = MB ( 1 - 1/2 )

• → W = MB/2

• →MB = 2W

• → τ = MB sin60° = MB √3/2 = W√3 Answer