# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 190 - 193 of 268

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## Question number: 190

MCQ▾

### Question

A block of mass 25 kg slides down a rough slope which is inclined at 450 to the horizontal. The coefficient of sliding friction is 0.30. When the block has slid 15 m, the work done on the block by the force of friction is nearly,

### Choices

Choice (4) Response

a.

b.

c.

795.45 J

d.

## Question number: 191

MCQ▾

### Question

A 10 kW drilling machine is used to drill a hole in a metal block of mass 15 kg. Assuming that 30 % power is lost in the machine, calculate the rise in temperature of the block in 4 minutes. Specific heat capacity of metal = 0.4 Jg-1 K-1.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 192

Appeared in Year: 2015

MCQ▾

### Question

The state of an ideal gas was changed isobarically. The graph depicts three such isobaric lines. Which of the following is true about the pressures of the gas?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 193

Appeared in Year: 2015

MCQ▾

### Question

In the circuit shown below, all the inductors (assumed ideal) and resistors are identical. The current through the resistance on the right is I after the key K has been switched on for a long time. The currents through the three resistors (in order, from left to right) immediately after the key is switched off are,

### Choices

Choice (4) Response

a.

2I upwards, I downwards and I downwards.

b.

I downward, I downward and I downwards.

c.

0, I downwards and I downwards

d.

2I downward, I downward and I downwards.

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