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 thermistors are usually made of

Question # 2

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 3

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 4

The unit of conductance is

Question # 5

The energy stored in a charge capacitor

Question # 6

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 7

In a voltmeter the conduction takes place due to

Question # 8

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 9

Capacitance of two or more capacitors

Question # 10

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 # 11

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

Question # 12

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

Question # 13

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 14

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

Question # 15

The minimum charge on any object can not be less than

Question # 16

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 # 17

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

Question # 18

Which one of the following is the unit of electric field intensity

Question # 19

The speed of randomly moving electrons depends upon

Question # 20

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 21

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

Question # 22

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 23

Which of the following represents an electric current?

Question # 24

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

Question # 25

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 26

The ohm's is defined as

Question # 27

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

Question # 28

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 29

The nature of capacity of electrostatic capacitor depends on

Question # 30

The electric flux is linked with a surface will be maximum when

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
2 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
3 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
A. Negative
B. Positive
C. Infinite
D. Zero
4 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
5 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
6 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
7
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
8 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
9 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
A. 2 R
B. R/4
C. R/2
D. R
10 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

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