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Physics Test - 19

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Physics Test - 19
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Weekly Quiz Competition
  • Question 1
    3 / -1

    Which of the following is used for making the filaments of electric bulbs?

    Solution

    Tungsten has the highest melting point, that's why it is used for making bulb filaments .

  • Question 2
    3 / -1

    The expression for exclusive NOR gate is

    Solution

    Truth table of EX - NOR Gate is

    Hence only option 2 satisfies.

  • Question 3
    3 / -1

    Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature toC, the power received by a unit surface, (normal to the incident rays) at a distance R from the centre of the sun is

    Solution

  • Question 4
    3 / -1

    The binary representation of hexadecimal number C3 is

    Solution

    To convert C3 into hexadecimal, we will write down the respective values of C 12 and 3 into 4-digit binary form.

    12 - 1100

    3 - 0011

    Hence, C3 - 11000011

  • Question 5
    3 / -1

    A body thrown vertically upwards reaches a height and comes back. Which of the following is true about the acceleration due to gravity?

    Solution

    Acceleration due to gravity remains constant through out the motion of the object thrown

  • Question 6
    3 / -1

    The graph of input characteristics of common emitter amplifier is

    Solution

  • Question 7
    3 / -1

    Solution

  • Question 8
    3 / -1

    Solution

  • Question 9
    3 / -1

    A transistor is used as an amplifier in CB mode with a load resistance of 5 kW. The current gain of the amplifier is 0.98 and the input resistance is 70 W. The voltage gain and power gain respectively, are

    Solution

  • Question 10
    3 / -1

    A river is flowing from West to East with a speed of 5 m/min. A man can swim in still water with a velocity of 10 m/min. In which direction should the man swim, so as to take the shortest possible path to go to South?

    Solution

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