Capacitors

Capacitors well hold a charge until

• the applied voltage drops to zero

• 5 time constants

• an external discharge path is provided

• 1 time constant

Is there a limit to the amount of charge that capacitor can hold and why/why not?

• Yes, as the ratio of charge to p.d. is fixed.

• Yes, because the dielectric will breakdown in such a large field and charge will remain.

• No, as capacitance can always increase as p.d. increases.

• Yes, because the dielectric will breakdown in such a large field and charge will flow.

Is it correct to say that the capacitance is inversely proportional to the area of the parallel plates?

• True

• False

Which electronic components can be polarized and non-polarized?

• resistors

• inductors

• capacitors

• transformers

To increase the capacitance of a parallel-plate capacitor, you can:

• increase the area of the plates.

• increase the distance between the plates.

• all of these choices.

• none of these choices.

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Tags

NGSS.HS-PS2-5

Combined capacitance is equal to the

• sum of all capacitance of capacitors

• product of all capacitance

• difference between capacitors

• average capacitance of capacitors

Hello World

• 1/2 C

• 1/4 C

• 6/11 C

• 11/6 C

• 2 x 10^-2 J

• 2 x 10^-4 J

• 4 x 10^-2 J

• 4 x 10^-4 J

Tags

NGSS.HS-PS3-2

• The capacitance of the capacitor is 5.0 μF

• When the potential difference is 2 V the charge stored is 10 μC

• When the potential difference is 2 V the energy stored is 10 μJ

• When the potential difference is 6 V the energy stored is 180 μJ