KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 62 - 63 of 268

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Question number: 62

» Work, Energy and Power » Work Done

Appeared in Year: 2012

MCQ▾

Question

A conducting rod of mass m and length l is free to move without friction on two parallel long conducting rails, as shown below. There is a resistance R across the rails. In the entire space around, there is a uniform magnetic field B normal to the plane of the rod and rails. The rod is given an impulsive velocity v0.

A conducting rod move on two parallel long conducting rails

A Conducting Rod Move on Two Parallel Long Conducting Rails

In figure a conducting rod of mass m and length l is free to move without friction on two parallel long conducting rails.

Finally, the initial energy Equation

Choices

Choice (4) Response

a.

will be converted fully into magnetic energy due to induced current

b.

will enable rod to continue to move with velocity v0 since the rails are frictionless

c.

will be converted fully into heat energy in the resistor

d.

will be converted into the work done against the magnetic field

Question number: 63

» Thermodynamics » Concept of Temperature

Appeared in Year: 2012

MCQ▾

Question

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is held at a temperature of 1000C while the other one is kept at 00 C. If the two are brought into contact, then, assuming no heat loss to the environment, the final temperature that they will reach is,

Choices

Choice (4) Response

a.

less than 500C

b.

00C

c.

more than 500C

d.

500C

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