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

Question # 2

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 # 3

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 4

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 # 5

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 6

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

Question # 7

Coulomb's force between two point charges depends upon

Question # 8

The resistance of the given conductor can be increased by

Question # 9

Current provided by a battery is maximum when

Question # 10

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 11

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 12

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

Question # 13

Surface density of charge is defined as

Question # 14

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 # 15

106electrons are moving through a wire per second, the current developed is

Question # 16

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 17

The SI unit of current is

Question # 18

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

Question # 19

The energy stored in a charge capacitor

Question # 20

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 21

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 22

Thermocouple is an arrangement of two different metals

Question # 23

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

Question # 24

Some charge is being given to a conductor. Then its potential

Question # 25

The minimum charge on any object can not be less than

Question # 26

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 27

The unit of resistance is

Question # 28

The electric field will be uniform

Question # 29

The SI unit of capacitance is

Question # 30

In a charged capacitor the energy is stored in

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
2 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
3 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
4 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
5 Magnetic effect at a point caused due to flow a current depend upon the
A. Quantity of current
B. Distance from current
C. Both the quantity of current and distance from current element
D. None of the all
6 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
7 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
8 If a 40 watt light bulb burns for 2 hours. how much heat is generated
A. 288 x 103J
B. 288 x 108J
C. 288 x 105J
D. 288 x 106J
9 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
10 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
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N

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