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Physics Test 10...

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  • Question 1
    4 / -1

    A sound has intensity of 2 × 10–8 W/m2. Its intensity level (in decibel) is : (log10 2 = 0.3)

  • Question 2
    4 / -1

    A body is moving forward and backward. Change in frequency observed by the body of a stationary source is 2%. What is velocity of the body ? (Vsound = 300 m/s)

  • Question 3
    4 / -1

    The displacement-time graphs for two sound wave A and B are shown in the figure, then the ratio of their intensities.

  • Question 4
    4 / -1

    In a semiconductor if 

  • Question 5
    4 / -1

    When p-n junction is forward biased then :-

  • Question 6
    4 / -1

    Directions For Questions

    In the given circuit

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    The current through the battery is

  • Question 7
    4 / -1

    In the given circuit, current through the zener diode is :-

  • Question 8
    4 / -1

    In an n-p-n transistor circuit, the collector current is 10 mA. If 90% of the electrons emitted reach the collector.

  • Question 9
    4 / -1

    To get an output 1 from the circuit shown in the figure, the input must be :-

  • Question 10
    4 / -1

    Ohm's law does not hold good for :-

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