2 joules
4 joules
6 joules
8 joules
Answer is Right!
Answer is Wrong!
Detailed SolutionWhen 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of
Electrostatics
92. Mica capacitors are characterised by all of the following except
stable operation
accurate value
low leakage reactance
low losses
Answer is Right!
Answer is Wrong!
Detailed SolutionMica capacitors are characterised by all of the following except
93. In a cable capacitor, voltage gradient is maximum at the surface of the
earth
conduction
sheath
insulator
Answer is Right!
Answer is Wrong!
Detailed SolutionIn a cable capacitor, voltage gradient is maximum at the surface of the
94. The unit of capacitance is
henry
ohm
farad
farad/m
Answer is Right!
Answer is Wrong!
95. The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to . . . . . . . . percent of its . . . . . . . . value.
37, initial
62, initial
62, final
37, final
Answer is Right!
Answer is Wrong!
96. An electrolytic capacitor is generally made to provide
low capacitance
fixed capacitance
variable capacitance
large value of capacitance
Answer is Right!
Answer is Wrong!
Detailed SolutionAn electrolytic capacitor is generally made to provide
97. Which of the following capacitors preferred for high frequency circuits ?
Air capacitor
Electrolytic capacitor
Mica capacitor
none of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionWhich of the following capacitors preferred for high frequency circuits ?
98. If three 15 uF capacitors are connected in series, the net capacitance is
5 uF
30 uF
45 uF
50 uF
Answer is Right!
Answer is Wrong!
Detailed SolutionIf three 15 uF capacitors are connected in series, the net capacitance is
99. Out of the following capacitors of identical rating which one will have the smallest dimensions ?
Aluminium foil capacitor
Mica capacitor
Ceramic capacitor
Paper capacitor
Answer is Right!
Answer is Wrong!
100. If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will
decrease
increase
remains unchanged
become zero
Answer is Right!
Answer is Wrong!