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 unit of resistivity is

Question # 2

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 3

Solar cell converts sunlight directly into

Question # 4

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

Question # 5

The electric lines of force are

Question # 6

The SI unit of electric field intensity is

Question # 7

The capacity of a parallel plat capacitor depends on the

Question # 8

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

Question # 9

Resistance of a conductor depends upon

Question # 10

The SI unit of capacitance is

Question # 11

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

Question # 12

The unit of intensity of electric field is

Question # 13

Coulomb force, when any material medium is placed between two charges

Question # 14

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

Question # 15

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

Question # 16

The minimum charge on any object can not be less than

Question # 17

The liquid which conduct current is known as

Question # 18

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 19

The relation V = IR represents

Question # 20

The thermistors are usually made of

Question # 21

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

Question # 22

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

Question # 23

In a voltmeter the conduction takes place due to

Question # 24

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

Question # 25

At any point on the right bisector of the line joining two equal and opposite charges

Question # 26

The SI unit of current is

Question # 27

Which of the following does not obey ohm's law?

Question # 28

Which of the following represents an electric current?

Question # 29

The dot product of electric field intensity E and vector area A is called

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
2 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
3 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
4 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
A. 10-1A
B. 10-2A
C. 10-4A
D. 1 mA
5 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
6 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy
A. Ve
B. V/e
C. e/V
D. 2Ve
7 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
A. 120 C
B. 240 C
C. 20 C
D. 4 C
8 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
9 An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
10 The value of electrical constant of proportionality k is
A. 9 x 109Nm2C-2
B. 9 x 10-9Nm2C-2
C. 9 x 1010Nm2C2
D. 9.85 x 10-12N-1C-2

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    fun day

    02 Mar 2023

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    18 Jun 2019

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    27 Apr 2019

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    15 Feb 2019

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