An open coil has
zero resistance and high inductance
infinite resistance and normal inductance
zero resistance and inductance
infinite resistance and zero inductance
infinite resistance and zero inductance
Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be
unaffected
halved
doubled
quadrupled
doubled
The unit of capacitance is
farad
farad/m
ohm
henry
farad
A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be
10 uF
100 nF
10 F
1000 uF
10 uF
A dielectric material must be
semi conductor
insulator
resistor
good conductor
insulator
Which of the following material has least value of dielectric constant ?
Oil
Ceramics
Glass
Paper
Oil
Which of the following capacitors will have the least value of breakdown voltage ?
Ceramic
Paper
Mica
Electrolytic
Electrolytic
Dielectric constant for mica is nearly
200
100
3 to 8
1 to 2
3 to 8
Dielectric strength of mica is
50 to 200 kV/mm
300 to 500 kV/mm
30 to 50 kV/mm
10 to 20 kV/mm
50 to 200 kV/mm
The dielectric constant (relative permittivity) of glass is given by
5 to 100
0.5 to 1.0
0.1 to 0.4
2.0 to 4.0
5 to 100
पोस्ट अच्छी लगी हो तो प्लीज नीचे दिए गए लिंक पर क्लिक कर शेयर जरुर करें
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