Free Printable 12th B phy quiz 2 Q4

Worksheets

12th B phy quiz 2 Q4

Total questions: 23

Worksheet time: 14mins

Name

Class

Date

If the capacitance is 47μF, and the voltage difference across the capacitor terminals is 6V, then the energy stored in that capacitor is:

846×10^-6Joule

7.23×10^-3 Joule

6.76×10^-5Joule

5.94×10^-2Joule

What happens to the charge in a capacitor during the discharging process?

Increases over time

Decreases over time

Remains the same

can't tell

The following are factors affecting capacitance, except.

Dielectric in between the metal plates

Area of the metal plates

Distance of separation of the metal plates

Voltage across the metal plates

The capacitance of a parallel-plate capacitor is:

proportional to the plate area

Inversely proportional to the distance

Dependent of materials inserted between the plates

All of the others

The capacitance of a parallel-plate capacitor can be increased by:

increasing the charge

decreasing the charge

increasing the plate separation

decreasing the plate separation

What is the voltage across the plates of the capacitor if the capacitance is 10 uF and the Charge stored is 30 uC?

0.333 V

3 V

300 V

30 V

With respect to the capacitor, which relationship is true?

C = Q/V

V = C×Q

Q = C/V

Q = V/C

A parallel plate capacitor is connected to a cell of constant emf. The plates are moved further apart without disconnecting the cell. What happens to the capacitance and voltage across the plates?

capacitance increases; voltage remains constant

capacitance remains constant; voltage decreases

capacitance decreases; voltage increases

capcitance decreases; voltage remains constant

The difference in electrical potential energy between two places is called

resistance

friction

induction

voltage

10.

This is related to the force that causes electric charges to flow

Voltage

Current

Resistance

Circuit

11.

The electric potential at a distance of 4 m from a certain point charge is 200 V relative to infinity. What is the potential (relative to infinity) at a distance of 2 m from the same charge?

600 V

50 V

200 V

400 V

12.

A tiny sphere carrying a charge of 6.5 µC sits in an electric field, at a point where the electric potential is 240 V. What is the sphere’s potential energy?

2.7 x 10^-8 J

6.5 x 10^-6 J

1.6 x 10^-3 J

240 J

13.

According to Coulomb's Law, The greater the separation distance between two charges the greater the magnitude of the electric force. True or False?

True

False

14.

The movement of electrically charged _____ is called electric _____

particles, transport

ions, current

particles, current

ions, transport

15.

A capacitor is a simpler device that the battery and it produces electrons just like the battery does

True

False

16.

A capacitor can deliver electrons a lot faster than a battery can

True

False

17.

Batteries are better suited for camera flashes than capacitors

True

False

18.

While charging a capacitor, if you increase the voltage from 1.5v to 3.0v by adding another battery in series the capacitor will have, when fully charged :

1.5 v

3.0 v

4.5 v

5.0 v

19.

To increasing the net charges of a capacitor one must:

Increasing the distance between the 2 plates

Adding a special material between the 2 plates

Decreasing the distance between the 2 plates

Increasing the size of the plates

20.

Mechanical energy is conserved as long as friction and radiation are not present

True

False

21.

∆PEelectric = −qEd

In the formula the negative sign indicates that the electrical potential energy will increase if the charge is negative and decrease if the charge is positive.

True

False

22.

Capacitors are safer than battery because they can discharge rapidly

False

True

23.

Voltage breakdown occurs when a capacitor:

Receives more electrons than it can handle and discharges

Is in a magnetic field

Receives too few electrons

has reduced its capacitance

Reset

12th B phy quiz 2 Q4

Total questions: 23

Worksheet time: 14mins

Similar Resources on Wayground