11 class 1st lesson

11 class 1st lesson

by Yerzhan Zhumadilov

Multiple Choice

Quantity of charge can be measured in

• time (s)

• Ampere (A)

• coulombs (C)

• Joule (J)

Multiple Choice

• One

• Two

• Three

• Four

Multiple Choice

Capacitor is a device used to__________

• store electrical energy

• vary the resistance

• store magnetic energy

• dissipate energy

Multiple Choice

Unit of capacitance is___________

• Volts

• Farad

• Henry

• Newton

Multiple Choice

A capacitor stores electrical energy in the form of _____ field.

• magnetic

• electric

• gravitational

Multiple Choice

The ratio of charge to the potential difference of a capacitor is _______.

• resistance

• inductance

• capacitance

Multiple Choice

A 0.25 µF capacitor is connected to a 400-V battery. What potential energy is stored in the capacitor?

• 1.2 x 10^-12 J

• 1.0 x 10^-14 J

• 0.040 J

• 0.020 J

Multiple Choice

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.

Multiple Choice

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

Multiple Choice

• 0.50 V

• 1.0 V

• 2.0 V

• 4.0 V

Multiple Choice

Two capacitors with capacitance's of 1.0 µF and 0.50 µF, respectively, are connected in series. The system is connected to a 100 V battery. What charge accumulates on the 1.0 µF capacitor?

• 150 µC

• 100 µC

• 50 µC

• 33 µC

Multiple Choice

Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 1.0 m² using paper (k = 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it store at a plate voltage of 5 000 V?

• 0.41 J

• 90 J

• 9 000 J

• 45 000 J