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

Electric generators which convert mechanical energy into

Question # 2

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 3

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

Question # 4

The speed of randomly moving electrons depends upon

Question # 5

The unit of resistance is

Question # 6

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 # 7

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

Question # 8

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

Question # 9

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 10

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 11

Electron volt is the unit of

Question # 12

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

Question # 13

The SI unit of electric field intensity is

Question # 14

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

Question # 15

One joule is equal to

Question # 16

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

Question # 17

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

Question # 18

The minimum charge on any object can not be less than

Question # 19

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

Question # 20

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

Question # 21

Resistance of a conductor depends upon

Question # 22

The liquid which conduct current is known as

Question # 23

Battery is charged in motor cars, which is based on

Question # 24

The SI unit of current is

Question # 25

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

Question # 26

The electrode connected with the positive terminal of the current source is called

Question # 27

The electric lines of force are

Question # 28

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 29

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)

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
2 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
3 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
A. negative charges
B. positive charges
C. protons
D. electrons
4 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons
5 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
6 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
7 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
8 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
9 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
10 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J

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