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 electric intensity at infinite distance from the point charge will be

Question # 2

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

Question # 3

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 4

The graphical representation of ohm's law is

Question # 5

Magnetic effect at a point caused due to flow a current depend upon the

Question # 6

The unit of resistivity is

Question # 7

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

Question # 8

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

Question # 9

Ohm's law states that

Question # 10

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 11

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 # 12

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

Question # 13

Ohm established a relation between

Question # 14

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 15

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

Question # 16

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 # 17

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Question # 18

The nature of capacity of electrostatic capacitor depends on

Question # 19

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 20

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 # 21

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

Question # 22

Surface density of charge is defined as

Question # 23

In a charged capacitor the energy is stored in

Question # 24

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

Question # 25

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

Question # 26

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 27

The relation V = IR represents

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric field intensity at a point due to a point charge
A. Falls off inversely as the distance
B. Falls off inversely as the square of distance
C. Remains unchanged with distance
D. Increase directly as square of distance
2 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
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
3 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
4 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
5 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
6 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
7 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
8 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
9 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
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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