Practice MCQ Questions and answers on Physics-GK Page-4 section-12

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Section 12 Section 13 Section 14 Section 15

31.
When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are

A. Longitudinal

B. Transverse

C. Both longitudinal and transverse

D. Waves are not produced

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32.
When a light wave is reflected from a mirror, there is a change in its

A. Frequency

B. Amplitude

C. Wavelength

D. Velocity

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33.
A doppler effect occurs when a source of sound moves

A. Away from you

B. Towards you

C. Both A & B

D. None of the above

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34.
Stationary wave is formed by

A. A transverse wave superposing a longitudinal wave

B. Two waves of the same speed superposing

C. Two waves of same frequency travelling in the same direction

D. Two waves of same frequency travelling in the opposite direction

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35.
Ultrasound devices operate with minimum frequency from

A. 20kHz

B. 35 kHz

C. 45 kHz

D. 60 kHz

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36.
Which of the following is not a transverse wave?

A. Light waves

B. Radio waves

C. Sound waves

D. All the above

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37.
What is the name of the device used to convert alternating current into direct current ?

A. Ammeter

B. Galvanometer

C. Rectifier

D. Transformer

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38.
A Step-Up transformer increases

A. Power

B. Current

C. Frequency

D. Voltage

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39.
A transformer

A. Converts DC to AC

B. Is used to decrease or increase AC voltage

C. Converts AC voltage to D.C. voltage

D. Converts electrical energy into mechanical energy

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40.
In AC circuits, AC meters measure

A. Mean values

B. Rms values

C. Peak values

D. Mean square values

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Practice MCQ Questions and answers on Physics-GK

31. When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are

Answer & Solution

32. When a light wave is reflected from a mirror, there is a change in its

Answer & Solution

33. A doppler effect occurs when a source of sound moves

Answer & Solution

34. Stationary wave is formed by

Answer & Solution

35. Ultrasound devices operate with minimum frequency from

Answer & Solution

36. Which of the following is not a transverse wave?

Answer & Solution

37. What is the name of the device used to convert alternating current into direct current ?

Answer & Solution

38. A Step-Up transformer increases

Answer & Solution

39. A transformer

Answer & Solution

40. In AC circuits, AC meters measure

Answer & Solution

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31.
When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are

32.
When a light wave is reflected from a mirror, there is a change in its

33.
A doppler effect occurs when a source of sound moves

34.
Stationary wave is formed by

35.
Ultrasound devices operate with minimum frequency from

36.
Which of the following is not a transverse wave?

37.
What is the name of the device used to convert alternating current into direct current ?

38.
A Step-Up transformer increases

39.
A transformer

40.
In AC circuits, AC meters measure