ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

Question # 1

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 # 2

The relation V = IR represents

Ampere law A
Faraday's law B
Ohm's law C
Len's law D

Question # 3

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

5 volt A
3 volt B
15 volt C
9 volt D

Question # 4

The capacity of a parallel plat capacitor depends on the

Type to metal used A
Thickness of plates B
Potential applied across the plates C
Separation between the plates D

Question # 5

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Zero A
5μC m^-2 B
20μC m^-2 C
8μC m^-2 D

Question # 6

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved

1.92 N A
19.2 N B
12 N C
0.192 N D

Question # 7

In bringing an electron towards another electron, electrostatic potential energy of system

Decreases A
Increases B
Remains uncharged C
Becomes zero D

Question # 8

Consider a spherical shell of metal at he centre of which a positive point charge is kept

The electric filed is zero outside the shell A
The electric field is zero everywhere B
The electric field is zero in the region inside the shell C
The electric field is non-zero in both regions outside and inside the shell D

Question # 9

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

10 KJ A
5 KJ B
2 KJ C
1 KJ D

Question # 10

The SI unit of permitivity is

Nm²C² A
N^-1m^-2C² B
NmC² C
Nm²C^-1 D

Question # 11

In a voltmeter the conduction takes place due to

Electrons only A
Holes only B
Electrons and holes C
Electrons and ions D

Question # 12

The SI unit of conductivity is

ohm-m A
ohm^-1m^-1 B
ohm-m^-1 C
ohm^-1m D

Question # 13

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

3/5 ohm A
2 ohm B
6/5 ohm C
3 ohm D

Question # 14

10⁶electrons are moving through a wire per second, the current developed is

1.6 x 10^-19 A
1 A B
1.6 x 10^-15A C
10⁶A D

Question # 15

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 # 16

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

Vaccum A
Air B
Glass C
Water D

Question # 17

Coulomb's force between two point charges depends upon

Magnitude of charges A
Distance between them B
Medium in which they are located C
All of the above D

Question # 18

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 # 19

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 # 20

Free electrons are

tightly bound A
fixed B
loosely bound C
tightly fixed D

Question # 21

Resistance of a conductor is increased, the currant will

Decrease A
Increase B
Remain the same C
None of these D

Question # 22

The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

9.8 A
24 x 10¹⁹ B
24 x 10⁴² C
24 x 10^-44 D

Question # 23

The electric field due to an infinite long thin wire at a distance R varies as

1/R A
1/R² B
R C
R² D

Question # 24

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

9 x 10⁵V A
9 V B
8 x 10⁶V C
80 V D

Question # 25

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

5 A
0.5 B
0.005 C
50 D

Question # 26

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

positive temperature A
negative temperature B
absolute temperature C
zero temperature D

Question # 27

The resistance of a conductor does not depend on its

mass A
resistivity B
length C
cross-sectional area D

Question # 28

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

4/5Ω A
5/4Ω B
20Ω C
0.05 Ω D

Question # 29

Electric flux is defined by the relation

E.A. A
E x A B
E/A C
none of these D

Question # 30

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

1310 W A
670 W B
810 W C
1210 W D

Sr.#	Question	Answer
1	Consider a spherical shell of metal at he centre of which a positive point charge is kept	A. The electric filed is zero outside the shell B. The electric field is zero everywhere C. The electric field is zero in the region inside the shell D. The electric field is non-zero in both regions outside and inside the shell
2	A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?	A. Electric potential at the surface of the cube is zero B. Electric potential within the cube is zero C. Electric filed is normal to the surface of the cube D. Electric filed varies within the cube
3	If electric and gravitational force on an electron in a uniform electric field will be	A. E=mg/q B. E=q/mg C. E=,g/q D. E=qg/m
4	Which one of the following causes production of heat when current is set up in a wire?	A. Fall of electrons from higher orbits to lower orbits B. Inter-atomic collisions C. Inter-electron collisions D. Collisions of conduction electron with atoms
5	The electric field due to an infinite long thin wire at a distance R varies as	A. 1/R B. 1/R² C. R D. R²
6	The substances whose resistance decreases with the increase in temperature these substances have coefficient of	A. positive temperature B. negative temperature C. absolute temperature D. zero temperature
7	The speed of randomly moving electrons depends upon	A. pressure B. volume C. temperature D. mass
8	If the length of the conductor is double and its cross sectional area is halved, its conductance will	A. Increase four fold B. Become one-fourth C. Become one-half D. Remains unchanged
9	Which one of the following has larger value of relative permitivity E_rat room temperature?	A. Vaccum B. Air C. Glass D. Water
10	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	A. 10μF B. 20μF C. 30μF D. 15μF

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

Physics ECAT Pre Engineering Chapter 12 Electrostatics

The value of electrical constant of proportionality k is

The relation V = IR represents

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

The capacity of a parallel plat capacitor depends on the

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

In bringing an electron towards another electron, electrostatic potential energy of system

Consider a spherical shell of metal at he centre of which a positive point charge is kept

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

The SI unit of permitivity is

In a voltmeter the conduction takes place due to

The SI unit of conductivity is

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

106electrons are moving through a wire per second, the current developed is

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

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

Coulomb's force between two point charges depends upon

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

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

Free electrons are

Resistance of a conductor is increased, the currant will

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

The electric field due to an infinite long thin wire at a distance R varies as

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

The resistance of a conductor does not depend on its

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Electric flux is defined by the relation

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Prepare Complete Set Wise Physics ECAT Pre Engineering Chapter 12 Electrostatics MCQs Online With Answers

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

Topic Test

Top Scorers Of Physics ECAT Pre Engineering Chapter 12 Electrostatics MCQ`s Test

ECAT Physics Chapter 12 Important MCQ's

Test Questions

Share your comments & questions here

fun day

Hira arif

Alisha