ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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

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

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

The potential difference across each resistance in series combination is

Question # 2

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 3

If electric and gravitational force on an electron in a uniform electric field will be

Question # 4

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 5

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 6

The SI unit of permitivity is

Question # 7

Electric flux is defined by the relation

Question # 8

Electron volt is the unit of.

Question # 9

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 10

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 11

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

Question # 12

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 13

The SI unit of conductivity is

Question # 14

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 15

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Question # 16

The resistivity of a substance depends upon the

Question # 17

Specific resistance of a wire depends upon

Question # 18

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 19

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 20

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

Question # 21

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 22

The electric flux from a closed surface

Question # 23

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 24

The nature of capacity of electrostatic capacitor depends on

Question # 25

The earth's potential is taken as

Question # 26

The charge carriers in electrolyte are positive and negative

Question # 27

The SI unit of current is

Question # 28

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 29

The liquid which conduct current is known as

Question # 30

Potentiometer is more sensitive than voltmeter, because

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
2 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
3 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
4 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
5 In a voltmeter the conduction takes place due to
A. Electrons only
B. Holes only
C. Electrons and holes
D. Electrons and ions
6 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
7 A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to
A. -q
B. +q
C. -2q
D. +4q
8 A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
9 Thermocouple is an arrangement of two different metals
A. To convert heat energy in to electrical energy
B. To produce more heat
C. To convert heat energy into chemical energy
D. To convert electric energy in to heat energy
10 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω

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