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.Management Sciences
Category: Electrostatics
A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
0
A. Paper capacitor
B. Ceramic capacitor
C. Electrolytic capacitor
D. Any-of the above
A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is__________?
A. 50 joules
B. 150 joules
C. 200 joules
D. 250 joules
If mica sheet is placed between the plates of a capacitor the capacity_______________?
A. increases
B. decreases
C. increases then decreases
D. decreases then increases
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?
A. Voltage across the plates increases
B. voltage across the plates decreases
C. charge on the capacitor decreases
D. charge on the capacitor increases
The lines of force due to charged particles are_________?
A. always straight
B. always curved
C. sometimes curved
D. none of the above
Mica capacitors are characterized by all of the following except___________?
A. stable operation
B. accurate value
C. low leakage reactance
D. low losses
A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is______________?
A. 0.2 s
B. 0.4 s
C. 0.6 s
D. 0.8 s
The force per unit charge is know as__________________?
A. electric flux
B. electric intensity
C. electric potential
D. all of above are same
The minimum value of potential gradient in a cable occurs in____________?
A. insulation
B. conductor
C. outer sheath
D. uniformly all over
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