ECAT Pre General Science Chapter 12 online mcq test with answers for Physics chapter 12 (Electrostatics)

ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test

Try the ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test.

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ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test

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Question # 1

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

The charge in the plates reduces and potential difference increase A
Potential difference between the plates increase, stored energy decreases and charge remains the same B
Potential difference between the plates decreases and charge remains unchanged C
None of the above D

Question # 2

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

64 W A
80 W B
100 W C
125 W D

Question # 3

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

108 g A
10.8 g B
0.8 g C
108/0.8 g D

Question # 4

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Negative A
Positive B
Infinite C
Zero D

Question # 5

One coulomb of charge is created by

10 electrons A
1.6 x 10^-19electrons B
6.25 x 10¹⁸electrons C
6.25 x 10²¹electrons D

Question # 6

Electric generators which convert mechanical energy into

solar energy A
thermal energy B
kinetic energy C
electrical energy D

Question # 7

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

0.4 A A
11.4 A B
9.8 A C
10.6 A D

Question # 8

The energy stored in a charge capacitor

1/2CV² A
1/2C²V B
1/2C/V² C
None of these D

Question # 9

The unit of intensity of electric field is

newton/coluomb A
jule/coluomb B
volt x metre C
newton/metre D

Question # 10

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Coulomb's law A
Gauss's law B
Biot-Sarwat law C
Ampere's law D

Question # 11

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

one ohm A
one joule B
one volt C
one ampere D

Question # 12

Which one of the following has larger value of relative permitivity E_rat room temperature?

Vaccum A
Air B
Glass C
Water D

Question # 13

The electric intensity at infinite distance from the point charge will be

Infinite A
Positive B
Zero C
Negative D

Question # 14

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

10μF A
20μF B
30μF C
15μF D

Question # 15

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

negative charges A
positive charges B
protons C
electrons D

Question # 16

The value of electrical constant of proportionality k is

9 x 10⁹Nm²C^-2 A
9 x 10^-9Nm²C^-2 B
9 x 10¹⁰Nm²C² C
9.85 x 10^-12N^-1C^-2 D

Question # 17

Resistor is a device which convert electric energy to

Heat energy A
Chemical energy B
Elastic energy C
All of the above D

Question # 18

The unit of conductance is

ohm A
meter B
mho C
ohm-meter D

Question # 19

Ohm is the unit of

current A
capacitance B
energy C
resistance D

Question # 20

The resistance of the given conductor can be increased by

Increasing the area A
Changing resistivity B
Decreasing the length C
None of the above because change does not matter because in any case the volume remains the same D

Question # 21

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Increase four fold A
Become one-fourth B
Become one-half C
Remains unchanged D

Question # 22

If we increase the distance between two plates of the capacitor, the capacitance will

Increase A
Decrease B
Remain same C
First increase then decrease D

Question # 23

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is

3.9 A
4 B
4.2 C
6 D

Question # 24

A condenser of capacity 50μF is charged to 10 V.The energy stored is

1.25 x 10^-3J A
3.75 x 10^-3J B
2.5 x 10^-3J C
5 x 10^-3J D

Question # 25

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Q=V/C A
Q=C/V B
Q=1/2CV C
Q=CV D

Question # 26

Specific resistance of a wire depends upon

Length A
Cross-section area B
Mass C
None D

Question # 27

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

2 A
1 B
0.5 C
1.5 D

Question # 28

The charge per unit time through any cross-section of a conductor is called

capacitance A
electric power B
current C
potential difference D

Question # 29

Ohm's law states that

The current through a resistor is directly proportional to the applied voltage A
The voltage across a resistor is directly proportional to the current passing through it B
Resistance is the constant of proportionality between the voltage and current C
all of these D

Question # 30

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

1840 KeV A
1/1840 KeV B
1 KeV C
920 KeV D

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ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer for Physics chapter 12 (Electrostatics)

ECAT Pre General Science Physics Chapter 12 Test

ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test

ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

One coulomb of charge is created by

Electric generators which convert mechanical energy into

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

The energy stored in a charge capacitor

The unit of intensity of electric field is

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Which one of the following has larger value of relative permitivity Erat room temperature?

The electric intensity at infinite distance from the point charge will be

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

The value of electrical constant of proportionality k is

Resistor is a device which convert electric energy to

The unit of conductance is

Ohm is the unit of

The resistance of the given conductor can be increased by

If the length of the conductor is double and its cross sectional area is halved, its conductance will

If we increase the distance between two plates of the capacitor, the capacitance will

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

A condenser of capacity 50μF is charged to 10 V.The energy stored is

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Specific resistance of a wire depends upon

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

The charge per unit time through any cross-section of a conductor is called

Ohm's law states that

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Prepare All ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test MCQs With Answers

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Test Questions

Which one of the following has larger value of relative permitivity E_rat room temperature?

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is