The property possessed by only ferromagnetic substance is de

2 A linear magnet of magnetic moment M is bend in arc as shown in the given figure The magnetic moment of arc is Muy Me 1 M 3 3M T 60 2 3M 5A 4 Zero E Ma e y

5 A long straight wire of radius a carries a steady current I The current is uniformly distributed over its cross section The ratio of the magnetic fields B and B at radial distances and 2 a respectively from the a NEET 2016 2 axis of the wire is a 2 c 4 b 1 d 1 o

4 A is false But Ris 39 When a bar magnet is suspended freely in a uniform magnetic field identify the correct statements a The magnet experiences only couple and undergoes only rotatory motion b The direction of torque is along the suspension wire c The magnitude of torque is maximum when the magnet is normal to the field direction 1 only a and care correct 2 only a and b are correct 3 only b and care correct

23 The appropriate M versus magnetization magnetising field H curve for a paramagnetic substance is most a A b B c C d D MA 0 C A B D H

A beam of protons is moving horizontally towards you As it approaches it passes through a magnetic field directed downward The beam deflects 3 Does not deflect 1 To your left side 2 To your right side orporate Office B 58 Goal Building Budha Colony Patna 1 4 Nothing can be said

sometimes more than A bar magnet is made to fall through a long vertic copper tube The speed v of the magnet as function of time t is best represented by 1 a 2 b 3 c 1 d V d b a C

7 An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m 1 The permeability of the material of the rod is No 4 x 10 7 Tm A 1 2 4mx 10 5 Tm A 1 2 4mx 10 7 Tm A 1 2 3 2 4mx 10 4 Tm A 1 4 8 0 x 10 5 Tm A 1

7 In the given figure net magnetic field at O will be a c 0 0 O a 0 i 2 oi 4 37 2 0 4 7 2a 0 3a 0 b d Hoi 37 4 7 Moi 4 7 3m

2 A bar magnet of magnetic moment M is placed at a distance D with its axis along positive X axis Likewise second bar mag net of magnetic moment M is placed at a distance 2D on positive Y axis and perpen dicular to it as shown in the figure The mag nitude of magnetic field at the origin is B HOM 4 D Assume D l where l is the length of magnets The value of a must be b N 2D OD 15 S N S X 17 9

In the figure shown a current I is established in the long straight wire AB Another wire CD carrying current I i placed in the plane of the paper The line joining the ends of this wire is perpendicular to the wire AB The resultant force on the wire CD is 1 zero towards positive y axis Bi K X C A 2 towards negative x axis 4 none of these