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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Physics
Chapter: Magnetic Properties of Matter

NTA Abhyas 2020 · Physics · Magnetic Properties of Matter

A magnetic dipole is placed in a uniform magnetic field of...

A magnetic dipole is placed in a uniform magnetic field of intensity

B

, oriented along the direction of the field.& If the& magnetic dipole moment is

M

,& then the& maximum work an external agent can perform in rotating the dipole will be

Options

A $\dfrac{1}{2}MB$
B $4MB$
C $2MB$
D $MB$

Correct answer

C. $2MB$

Step-by-step solution

The maximum work done by an external agent is

$W = {U}_{180 °} - {U}_{0 °}$

$W = MB - \left(-MB\right)$

$W = 2MB</p>$

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