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Electrostatic and Capacitance

Electrostatic and Capacitance
The relative permittivity has the following units

m/F
no units
F/m
Wb/m

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Electrostatic and Capacitance
A region around a stationary electric charge has

Both Electric & Magnetic
An electric field
None of the listed here
A magnetic field

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Electrostatic and Capacitance
Four 0.15 µF capacitors are in parallel. The total capacitance is

0.8 µF
0.6 µF
0.15 µF
0.30 µF

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Electrostatic and Capacitance
Capacitors are mainly used for radio frequency tuning.

Paper
Mica
Air
Electrolytic

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Electrostatic and Capacitance
If three 15 uF capacitors are connected in series, the net capacitance is

20 uF
5 uF
15 uF
10 uF

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Electrostatic and Capacitance
Dielectric strength of mica is

30 to 50 kV/mm
300 to 500 kV/mm
50 to 200 kV/mm
10 to 20 kV/mm

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