Magnetic Effects of Electric Current-MCQ

1.  What should be the core of an electromagnet?

a. soft iron

b. hard iron

c. rusted iron

d. none of above

2.  Who has stated the Right hand Thumb Rule?

a. Orsted

b. Fleming

c. Einstein

d. Maxwell

3.  In all the electrical appliances, the switches are put in the

a. live wire

b. earth wire

c. neutral wire

d. all of above

4.  What is the condition of an electromagnetic induction?

a. there must be a relative motion between the coil of wire and galvanometer

b. there must be a relative motion between the galvanometer and a magnet

c. there must be a relative motion between galvanometer and generator

d. there must be a relative motion between the coil of wire and a magnet

5.  No force acts on a current carrying conductor when it is placed-

a. perpendicular to the magnetic field

b. parallel to the magnetic field

c. far away from the magnetic field

d. inside a magnetic field

6.  What is that instrument which can detect the presence of electric current in a circuit?

a. galvanometer

b. motor

c. generator

d. none of above

7.  Which device produces the electric current?

a. generator

b. galvanometer

c. ammeter

d. motor e.

8.  What is electromagnetic induction?

a. the process of charging a body

b. The process of rotating a coil of an electric motor.

c. producing induced current in a coil due to relative motion between a magnet and the coil

d. The process of generating magnetic field due to a current passing through a coil.

9.  What happens to the current in short circuit?

a. reduces substantially

b. .does not change

c. increases heavily

d. vary continuously

10.  An alpha particle is diverted towards west is deflected towards north by a field. The field is magnetic. What will be the direction of field?

a. Towards south

b. towards east

c. downward

d. upward

ANSWERS

    1.    A

    2.    D

    3.    C

    4.    D

    5.    B

    6.    A

    7.    A

    8.    B

    9.    C

    10. C