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EEE :: Current Electricity

  1. The property of a conductor due to which it passes current is called

  2. A.

     Resistance

    B.

     Reluctance

    C.

     Conductance

    D.

     Inductance


  3. The substances which have a large number of free electrons and offer a low resistance are called

  4. A.

     Insulators

    B.

     Inductors

    C.

     Semiconductors

    D.

     Conductors


  5. The ratio of mass of proton to that of electron is nearly

  6. A.

     1840

    B.

     1480

    C.

     30

    D.

     4


  7. Three resistances of 10 ohms, 15 ohms and 30 ohms are connected in parallel.
    The total resistance of the combination is

  8. A.

     5 ohms

    B.

     10 ohms

    C.

     15 ohms

    D.

     55 ohms


  9. Switching of a lamp in house produces noise in the radio. This is because switching operation produces

  10. A.

     Arcs across separating contacts

    B.

     Mechanical noise of high intensity

    C.

     Both mechanical noise and arc between contacts

    D.

     None of the above


  11. Which of the following statement is true?

  12. A.

     A galvanometer with low resistance in parallel is a voltmeter

    B.

     A galvanometer with high resistance in parallel is a voltmeter

    C.

     A galvanometer with low resistance in series is an ammeter

    D.

     A galvanometer with high resistance in series is an ammeter


  13. The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true?

  14. A.

     The current through each bulb in same

    B.

     The voltage across each bulb is not same

    C.

     The power dissipation in each bulb is not same

    D.

     None of the above


  15. A glass rod when rubbed with silk cloth is charged because

  16. A.

     It takes in proton

    B.

     Its atoms are removed

    C.

     It gives away electrons

    D.

     It gives away positive charge


  17. Insulating materials have the function of

  18. A.

     Preventing a short circuit between conducting wires

    B.

     Preventing an open circuit between the voltage source and the load

    C.

     Conducting very large currents

    D.

     Storing very high currents


  19. When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is

  20. A.

     A.C.

    B.

     D.C.

    C.

     Any of above two

    D.

     None of the above