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

    2. A.

     Longitudinal
    B.

     Transverse
    C.

     Both longitudinal and transverse
    D.

     Waves are not produced

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

    3. A.

     Frequency
    B.

     Amplitude
    C.

     Wavelength
    D.

     Velocity

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

    4. A.

     Away from you
    B.

     Towards you
    C.

     Both A & B
    D.

     None of the above

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  4. Stationary wave is formed by

    5. 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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  5. Ultrasound devices operate with minimum frequency from

    6. A.

     20kHz
    B.

     35 kHz
    C.

     45 kHz
    D.

     60 kHz

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

    7. A.

     Light waves
    B.

     Radio waves
    C.

     Sound waves
    D.

     All the above

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

    8. A.

     Ammeter
    B.

     Galvanometer
    C.

     Rectifier
    D.

     Transformer

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  8. A Step-Up transformer increases

    9. A.

     Power
    B.

     Current
    C.

     Frequency
    D.

     Voltage

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  9. A transformer

    10. 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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  10. In AC circuits, AC meters measure

    11. A.

     Mean values
    B.

     Rms values
    C.

     Peak values
    D.

     Mean square values

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