NEET 2013 (Karnataka) | Magnetism and Matter Question 23 | Physics

A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the length of the magnet will be

MB/F

BF/M

MF/B

F/MB

NEET 2013

MCQ (Single Correct Answer)

-1

A bar magnet of length $$'l'$$ and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be

NEET 2013 Physics - Magnetism and Matter Question 40 English

NEET 2013 Physics - Magnetism and Matter Question 40 English

$${2 \over \pi }M$$

$${M \over 2}$$

$${3 \over \pi }M$$

NEET 2013

MCQ (Single Correct Answer)

-1

A current loop in a magnetic field

can be in equilibrium in two orientations, both the equilibrium states are unstable.

can be in equilibrium in two orientations, one stable while the other is unstable.

experiences a torque whether the field is uniform or non uniform in all orientations.

can be in equilibrium in one orientation.

AIPMT 2012 Mains

MCQ (Single Correct Answer)

-1

A magnetic needle suspended parallel to a magnetic field requires $$\sqrt 3 J$$ of work to turn it through 60^o. The torque needed to maintain the needle in this position will be

$$2\sqrt 3 J$$

$$3$$ $$J$$

$$\sqrt 3 \,J$$

$${3 \over 2}\,J$$

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