ELECTROMAGNETICS

1. The force tending to move the electricity is called
a) current
b) resistance
c) emf
d) potential difference
ans. c

2. The ratio of voltage and current in a closed circuit
a) varies
b) remains constant
c) increases
d) decreases
ans. b

3. The meter which measures current is known as
a) voltmeter
b) avometer
c) ohm meter
d) ammeter
ans. d

4. The meter which measures voltage is known as
a) avo meter
b) ampere meter
c) voltmeter
d) multimeter
ans. c

5. The meter which measures voltage is known as
a) ohm meter
b) multimeter
c) voltmeter
d) ohm meter
ans. d

6. The unit of resistance is
a) ohm
b) volt
c) ampere
d) milli-volt
ans. a

7. For long transmission lines, voltage is measued in
a) volts
b) micro-volts
c) kilo-volts
d) milli-volts
ans. c

8. With the increase in length of conductor, the value of resistance
a) decreases
b) increases
c) remains same
d) none of these
ans. b

9. With the increase in cross-sectional area of the conductor, the value of resistance
a) increases
b) remains same
c) decreases
d) none of these
ans. c

10. Specific resistance of a conductor depends upon
a) composition of the conductor
b) length of the conductor
c) area of cross section of the conductor
d) resistance of the conductor
ans. a