NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2117 - 2119 of 2142

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Question number: 2117

» Current Electricity » Temperature Dependence of Resistance

Appeared in Year: 2017

MCQ▾

Question

Two rods and of different materials are welded together as shown in figure. Their thermal conductivities are and . The thermal conductivity of the composite rod will be

Two rods A and B are connected

Two Rods a and B Are Connected

In figure two rods A and B are welded together as shown in figure.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2118

» Work, Energy and Power » Conservative and Non-Conservative Forces

Appeared in Year: 2017

MCQ▾

Question

Consider a drop of rain water having mass falling from a height of . It hits the ground with a speed of . Take constant with a value . The work done by the:

Gravitational force and

Resistive force of air is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2119

» Ray Optics » Reflection and Refraction of Light » Smooth Surface

Appeared in Year: 2017

MCQ▾

Question

A beam of light from a source is incident normally on a plane mirror fixed at a certain distance from the source. The beam is reflected back as a spot on a scale placed just above the source . When the mirror is rotated through a small angle , the spot of the light is found to move through a distance on the scale. The angle∴ is given by –

Choices

Choice (4) Response

a.

b.

c.

d.

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