A. Varistors
B. Thermistor
C. Semi-conductors
D. Variable resistors
Related Mcqs:
- The resistance of a few meters of wire conductor in closed electrical circuit is____________?
A. practically zero
B. low
C. high
D. very high - Which of the following materials has a negative temperature co-efficient of resistance?
A. Copper
B. Aluminum
C. Carbon
D. Brass - Insulating materials have the function of______________?
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 - Insulating materials have the function of___________?
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 - 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 - A 3 Q resistor having 2 A current will dissipate the power of_______________?
A. 2 watts
B. 4 watts
C. 6 watts
D. 12 watts - Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be_____________?
A. 160 ohms
B. 80 ohms
C. 20 ohms
D. 10 ohms - An instrument which detects electric current is known as_____________?
A. voltmeter
B. rheostat
C. wattmeter
D. galvanometer - When one leg of parallel circuit is opened out the total current will______________?
A. reduce
B. increase
C. decrease
D. become zero - Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be_________________?
A. 9 times
B. 1/9 times
C. 1/3 times
D. 3 times
