NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1354 - 1357 of 2142

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Question number: 1354

» Wave Optics » Polarization

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: 1355

» Properties of Solids & Liquids » Elastic Behavior

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.

2.96 × 10 11 N/m 2

c.

19.6 × 10 11 N/m 2

d.

None of the above

Question number: 1356

» Wave Optics » Wavefront

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

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: 1357

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

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.

3456 Joules

b.

1500 Joules

c.

1728 Joules

d.

750 Joules

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