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

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Question 1

Physics
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Appeared in Year: 2013

Question

MCQ▾

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.The lens can never be concave
b.All focal length concave lenses are possible
c.All focal length convex lenses are possible
d.In some cases the lens can be concave if the focal length is much larger than 2.5 cm

Question 2

Physics
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Appeared in Year: 2013

Question

MCQ▾

Which of the following ray diagram is correct?

Choices

Choice (4)Response
a.
Choice a is a ray diagram
Loading image
b.
Choice b is a ray diagram
Loading image
c.
Choice c is a ray diagram
Loading image
d.
Choice d is a ray diagram
Loading image

Question 3

Physics
Edit

Appeared in Year: 2013

Question

MCQ▾

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.There is a huge air bubble in the path of sonar wave
b.The frequency of the sonar wave, generated by the equipment is lower than previous measurements
c.The loudness of the sonar wave, generated by the equipment is lower than previous measurement
d.There is a solid object of large size in the path of sonar wave