# KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 59 - 61 of 268

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## Question number: 59

Appeared in Year: 2011

MCQ▾

### Question

One mole of an ideal gas at initial temperature T, undergoes a quasi-static process during which the volume V is doubled. During the process the internal energy U obeys the equation, where a is a constant. The work done during this process is

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## Question number: 60

Appeared in Year: 2012

MCQ▾

### Question

In one model of the election, the mass of electron me is thought to be a uniformly charged shell of radius R and total charge e, whose electrostatic energy E is equivalent to its mass me via Einstein’s mass energy relation E = mec2. In this model, R is approximately – (me = 9.1 × 10-31kg, c = 3 × 108 ms-1, magnitude of the electron charge = 1.6 × 10-19 C)

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## Question number: 61

Appeared in Year: 2011

MCQ▾

### Question

At a distance l from a uniformly charged long wire, a charged particle is thrown radially outward with a velocity u in the direction perpendicular to the wire. When the particle reaches a distance 2l from the wire its speed is found to be. The magnitude of the velocity, when it is a distance 4l away from the wire, is (ignore gravity)

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