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Physics Past Questions and Answers

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Physics Questions

Question 966:

An astronomical telescope is said to be in normal adjustment when the

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A Eye is accommodated
B Focal length of objective lens is longer than that of eye piece
C Final image is at the near point of eye
D Final image is at infinity

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Question 967:

Which of the following electromagnetic waves is least energetic?

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A Infra-red rays
B X-rays
C Ultra-violet rays
D Gamma rays

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Question 968:

Steel is more suitable for permanent magnet than iron because the former

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A Is easily demagnetized by shaing vigorously
B Is an alloy of many metals
C Is easily magnetized by alternating current through one cycle
D Retains magnetism more than iron

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Question 969:

Four cells each of e.m.f 1.5V and internal resistance of 4Î© are connected in parallel. What is the effective e.m.f. and internal resistance of the combination?

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A 6.0V, 16Î©
B 6.0V, 1Ω
C 1.5V, 4Î©
D 1.5V, 1Î©

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Question 970:

A 3000W electric cooker is to be used on a 200V mains circuit. Which of the fuses below can be used safely with the cooker?

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A 2A
B 5A
C 10A
D 20A

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