# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1355 - 1358 of 2184

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## Question number: 1355

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MCQ▾

### Question

V 0 and V E represent the velocities, µ 0 and μ E the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then

### Choices

Choice (4) Response

a.

if the crystal is calcite

b.

if the crystal is quartz

c.

if the crystal is quartz

d.

if the crystal is calcite

## Question number: 1356

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MCQ▾

### Question

A uniform steel wire of density 7500 kg/m 3 is 2.5 m long and weighs 15.6 x 10 -3 kg. It extends by 1.25 mm when loaded by 10 kg. Calculate the value of young’s modulus of elasticity for steel.

### Choices

Choice (4) Response

a.

2.3 × 10 11 N/m 2

b.

19.6 × 10 11 N/m 2

c.

2.96 × 10 11 N/m 2

d.

Question does not provide sufficient data or is vague

## Question number: 1357

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MCQ▾

### Question

In the given diagram, CP represents a wavefront and AO & BP, the corresponding two rays. Find the condition on θ for constructive interference at P between the ray BP and reflected ray OP Wavefront Diagram with CP as Wavefront In the given diagram, CP represents a wavefront and AO & BP, the corresponding two rays.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 1358

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

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MCQ▾

### Question

One mole of an ideal gas expands at a constant temperature of 300 K from an initial volume of 10 litres to a final volume of 20 litres. The work done in expanding the gas is

(R = 8.31J/mole-K)

### Choices

Choice (4) Response

a.

1728 Joules

b.

750 Joules

c.

1500 Joules

d.

3456 Joules