The substances which have a large number of free electrons and offer a low resistance are called __________?
A. insulators
B. inductors
C. semi-conductors
D. conductors
Category: Current Electricity Mcqs
A resistance having rating 10 ohms, 10 W is likely to be a __________?
A. metallic resistor
B. carbon resistor
C. wire wound resistor
D. variable resistor
You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect __________?
A. two in parallel
B. two in parallel and one in series
C. three in parallel
D. three in series
An instrument which detects electric current is known as __________?
A. voltmeter
B. rheostat
C. wattmeter
D. galvanometer
Varistors are __________?
A. insulators
B. non-linear resistors
C. carbon resistors
D. resistors with zero temperature coefficient
Which is the best conductor of electricity?
A. Iron
B. Silver
C. Copper
D. Carbon
Which of the following material has nearly zero temperature co-efficient of resistance?
A. Manganin
B. Porcelain
C. Carbon
D. Copper
The resistance of a conductor varies inversely as __________?
A. length
B. area of cross-section
C. temperature
D. resistivity
Electric pressure is also called __________?
A. resistance
B. power
C. voltage
D. energy
