Capacitor

Capacitor is a device used to__________

• store electrical energy

• vary the resistance

• store magnetic energy

• dissipate energy

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3

For which medium capacitance is high?

• Air

• Mica

• Water

• Metal

The capacitance between two plates increases with

• Shorter plate area and higher applied voltage

• Shorter play area and shorter distance between them

• Larger plate area, longer distance between plates and higher applied voltage

• Larger plate area and shorter distance between plates

The capacitance C is charged through a resistor R. The time constant of the charging circuit is given by

• C/R

• 1/RC

• RC

• R/C

The capacitance of 1 μF equals

• 10 ^-12 F

• 10^-8 F

• 10^-6 F

• 10^-4 F

In a variable capacitor, capacitance can be varied by ______

• Turning the rotatable plates in or out

• Sliding the rotatable plates

• Changing the plates

• Changing the material of plates

Unit of capacitance is___________

• Volts

• Farad

• Henry

• Newton

Inserting a dielectric material between two charged parallel conducting plates, originally separated by air and disconnected from a battery, will produce what effect on the capacitor?

• increase charge

• increase voltage

• increase capacitance

• decrease capacitance

Combined capacitance is equal to the

• sum of all capacitance of capacitors

• product of all capacitance

• difference between capacitors

• average capacitance of capacitors

The figure to the right represents:

• Capacitor
• Diode
• Inductor
• Resistor