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

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 2

The charge carriers in electrolyte are positive and negative

Question # 3

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

Question # 4

Resistor is a device which convert electric energy to

Question # 5

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

Question # 6

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 7

The electric flux from a closed surface

Question # 8

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 # 9

The SI unit of conductivity is

Question # 10

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 # 11

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

Question # 12

Resistance of a conductor depends upon

Question # 13

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Question # 14

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

Question # 15

Physicist George Simon ohm was a

Question # 16

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 # 17

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

Question # 18

Heating effect caused by an electric circuit is written

Question # 19

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 20

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

Question # 21

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

Question # 22

The conductivity of a superconductor is

Question # 23

The charge carriers in gases are

Question # 24

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

Question # 25

Coulomb's force between two point charges depends upon

Question # 26

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

Question # 27

Surface density of charge is defined as

Question # 28

Solar cell converts sunlight directly into

Question # 29

Battery is charged in motor cars, which is based on

Question # 30

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

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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 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
3 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
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt
4 If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us
A. parabola
B. straight line
C. hyper bola
D. ellipse
5 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
6 Electric flux is defined by the relation
A. E.A.
B. E x A
C. E/A
D. none of these
7 The ohm's is defined as
A. 1 ampere / 1 volts
B. 1 coulomb / 1 volt
C. 1 volt / 1 ampere
D. 1 volt / 1 coulomb
8 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
9 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
10 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water

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