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Question

A current loop of area 0.01m2and carrying a current of 100Ais held parallel to a magnetic field of intensity 0.1T. The torque in Nm acting on the loop is:


A

Zero

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B

0.01Nm

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C

0.001Nm

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D

0.8Nm

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Solution

The correct option is A

Zero


Step 1: Given data

Area of the current loop, A=0.01m2

Electric current flowing in the current loop, I=100A

Magnetic field intensity, B=0.1T

Angle between the current loop and the magnetic field, θ=00

Torque acting on the current loop, 𝜏=?

Step 2: Formula used

𝜏=IABsinθ ………………….(a)

Step 3: Calculation of the torque acting on the current-carrying loop

Substituting the given values in equation (a), we get

𝜏=100A×0.01m2×0.1T×sin00𝜏=100×0.01×0.1×0𝜏=0

Hence, option (a) is correct.


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