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JEE PHYSICS MCQ: MAGNETISM AND MATTER

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Application +4 | -1

A

3 {~cm} \times 10 {~cm}

rectangular coil with number of turns 300 is placed in uniform magnetic field of strength

0.2 {~T}

. The maximum magnetic torque acting on it when a current of

10^{-4} {~A}

is passed through it; 

View answer and explanation

Correct option: D

1.8 \times 10^{-5} {Nm}

Option D (

1.8 \times 10^{-5} {Nm}

) is correct because it is the maximum torque calculated using the formula

\tau = NIBA \sin \theta

with

\theta = 90^{\circ}

.

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Curie temperature is the one above which A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is

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\mu_{\mathrm{d}}, \mu_{\mathrm{p}}

\mu_{\mathrm{f}}

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