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 field intensity at a point due to a point charge

Question # 2

Electric potential of earth is taken to be zero because the earth is good

Question # 3

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

Question # 4

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 5

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

Question # 6

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 7

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 # 8

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

Question # 9

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

Question # 10

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 11

Ohm established a relation between

Question # 12

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 13

The SI unit of current is

Question # 14

One electron volt is equal to

Question # 15

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 16

The SI unit of electric flux is

Question # 17

The electric field due to an infinite long thin wire at a distance R varies as

Question # 18

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 19

In a voltmeter the conduction takes place due to

Question # 20

Surface density of charge is defined as

Question # 21

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

Question # 22

The nature of capacity of electrostatic capacitor depends on

Question # 23

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 24

Cause of heat production in a current carrying conductor is

Question # 25

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

Question # 26

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 # 27

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 28

Equal charges are given to two spheres of different radii. The potential will

Question # 29

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

Question # 30

Resistance of a conductor is increased, the currant will

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The current through a metallic conductor is due to the motion of
A. protons
B. neutrons
C. electrons
D. free electrons
2 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
3 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
4 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
5 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
6 Current provided by a battery is maximum when
A. Internal resistance equal to external resistance
B. Internal resistance is greater than external resistance
C. Internal resistance is less then external resistance
D. None of these
7 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
A. 5μF
B. 20μF
C. 10μF
D. 15μF
8 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to
A. One joule
B. One erg
C. One electron volt
D. None of these
9 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one
10 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

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