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Physics Test 70

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Physics Test 70
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Weekly Quiz Competition
  • Question 1
    4 / -1

    Potential difference between point A and point B is:-

    Solution

     

  • Question 2
    4 / -1

    In the circuit resistance of voltmeter is 6KΩ then find its reading.

    Solution

     

  • Question 3
    4 / -1

    In the circuit shown in figure % error in the reading of Voltmeter is:-

    Solution

    Reading of voltmeter 


    Reading of voltmeter is = 200V
    it was ideal (R = ∞)
    % error = 7.69%

     

  • Question 4
    4 / -1

    The deflection in a galvanometer falls from 50 divisions to 20 divisions, when a 12Ω shunt is applied. The galvanometer resistance is:-

    Solution

    Suppose for one div deflection current is x.

     

  • Question 5
    4 / -1

    Two wires A and B of the same material having radii in the ratio 1 : 2 and carry currents in the ratio 4 : 1. The ratio of drift speed of electrons in A and B is:-

    Solution

     

  • Question 6
    4 / -1

    In the given circuit current through 20Ω resistor is 0.3A and reading of ammeter is 0.8A then the value of resistor R1 is:-

    Solution

     

  • Question 7
    4 / -1

    If potential difference between points a and b is zero then the value of resistance R is:-

    Solution

     

  • Question 8
    4 / -1

    In the given circuit all bulbs are identical. Which bulb will be the brightest.

    Solution

    Current through bulb C will be highest so it will be brightest.

     

  • Question 9
    4 / -1

    A heater coil takes 15 minute to boil water. If the length of the heating wire is decreased to 2/3 of its initial value, then the same amount of water will boil with the same supply voltage is:-

     

    Solution

     

  • Question 10
    4 / -1

    In the circuit shown, the reading of ammeter is:-

    Solution

     

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