Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 1 - 3 of 73

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Question number: 1

» Physics » Light

Appeared in Year: 2013

MCQ▾

Question

A concave lens always gives a virtual image. In optical lenses worn by humans which of the following statements is true?

Choices

Choice (4) Response

a.

All focal length concave lenses are possible

b.

In some cases the lens can be concave if the focal length is much larger than 2.5 cm

c.

The lens can never be concave

d.

All focal length convex lenses are possible

Question number: 2

» Physics » Light

Appeared in Year: 2013

MCQ▾

Question

Which of the following ray diagram is correct?

Choices

Choice (4) Response

a.

Choice a is a ray diagram

Choice a Is a Ray Diagram

Rays produce from an object and travel through lens and reach to focal point of object

b.

Choice b is a ray diagram

Choice B Is a Ray Diagram

Rays produce from an object and travel through lens and reach to focal point of object

c.

Choice c is a ray diagram

Choice C Is a Ray Diagram

Rays produce from an object and travel through lens and reach to focal point of object

d.

Choice d is a ray diagram

Choice D Is a Ray Diagram

Rays produce from an object and travel through lens and reach to focal point of object

Question number: 3

» Physics » Sound

Appeared in Year: 2013

MCQ▾

Question

A ship sends a sonar wave to the sea bed, which is flat and measured several times over a large area. One day the reflected sound wave takes longer time than in previous measurements. The possible reason is

Choices

Choice (4) Response

a.

The frequency of the sonar wave, generated by the equipment is lower than previous measurements

b.

The loudness of the sonar wave, generated by the equipment is lower than previous measurement

c.

There is a huge air bubble in the path of sonar wave

d.

There is a solid object of large size in the path of sonar wave

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