Capacitors are mainly used for radio frequency tuning:
Paper capacitor
Air capacitor
Mica capacitor
Electrolytic capacitor
Power of electric heater is:
1500W
4750W
100W
50W
Specific resistance of aluminium in (10-8 Ω.m) is:
1.7
2.75
5.25
1.69
The capacitance of a parallel plate capacitor is 100 pF and the potential difference between its plate is 50 volts. What is the quantity of charge on its plates:
5000c
50c
5nC
5NC
F=
qE
q-E
q/E
q+E