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Q.

A thin conducting rod MN of mass 10 gm, length 25 cm and resistance 5Ω is held on frictionless, long, perfectly conducting vertical rails as shown in the figure. There is a uniform magnetic field B0=4T directed perpendicular to the plane of the rod-rail arrangement. The rod is released from rest at time t = 0 and it moves down along the rails. Assume air drag is negligible. Match each quantity in List-I with an appropriate value from List-II, and choose the correct option.
[Given: The acceleration due to gravity  g=10ms2 and  e1=0.4]

Question Image
 List-I List-II
P)At t = 0.1 s, the magnitude of the  induced emf in Volt1)0.084
Q)At t = 0.1 s, the magnitude of the magnetic force in Newton2)0.42
R)At t = 0.1 s, the power dissipated as heat in Watt3)0.042
S)The magnitude of terminal velocity of the rod in  ms14)0.035
   0.5

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a

P3;Q1;R4;S5

b

P2;Q1;R4;S5

c

P5;Q2;R3;S1

d

P3;Q4;R2;S5

answer is C.

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