Thursday, 25 July 2013

Electrostatics and Current Electricity


Here is another set of MCQ's form chapter 12 and 12 ie Electrostatics and Current Electricity. Read Question carefully


1. A dynamo develops 10 ampere at 100 volt. The electric power is
    A) 1 KW
    B) 10000 KW
    C) 10 KW
    D) 100 KW


2. On increasing the length of the wire, specific resistance o the wire

    A) Decreases
    B) Increases
    C) Remains unchanged
    D) First increase then decrease


3. The resistance of a wire is 8 ohm, the wire is stretched to double then new resistance will be in ohms

    A) 16
    B) 24
    C) 2
    D) 32


4. The color code of 10 ohm resistance with 5% tolerance is

    A) Black, black, brown, silver
    B) Brown, black, black, gold
    C) Black, brown, black, gold
    D) Brown, brown, black, gold


5. What would be the equivalence resistance of a circuit having three resistances of 9 ohm each, connected in parallel

    A) 6
    B) 27
    C) 3
    D) 1


6. Resistivity of a conductor depends upon

    A) Temperature
    B) Nature of material
    C) both
    D) Temperature, length and nature of materaial


7. The number of terminals in rheostat are

    A) 4
    B) 3
    C) 2
    D) 1


8. Voltage of 600V can be obtained virtually from

    A) dry battery
    B) nickel cadmium battery
    C) head and tail of an eel
    D) transformer


9. Which one is not the effect of current

    A) Heating effect
    B) Magnetic effect
    C) Chemical effect
    D) Electric polarization


10. Maximum power is delivered by battery to load

    A) R=r
    B) R>r
    C) R
    D) all








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