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

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 2

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 # 3

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

Question # 4

The current through a metallic conductor is due to the motion of

Question # 5

The SI unit of permitivity is

Question # 6

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 7

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

Question # 8

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

Question # 9

Potentiometer is more sensitive than voltmeter, because

Question # 10

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

Question # 11

Physicist George Simon ohm was a

Question # 12

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 13

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

Question # 14

The resistance of the given conductor can be increased by

Question # 15

Free electrons are

Question # 16

The electric lines of force are

Question # 17

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

Question # 18

Coulomb's force between two point charges depends upon

Question # 19

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

Question # 20

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

Question # 21

The electric flux from a closed surface

Question # 22

The charge carriers in electrolyte are positive and negative

Question # 23

An electric charge at rest is

Question # 24

The liquid which conduct current is known as

Question # 25

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 26

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 # 27

One coulomb per second is equal to

Question # 28

The minimum charge on any object can not be less than

Question # 29

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

Question # 30

One electron volt is equal to

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
2 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola
3 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
4 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
5 The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44
6 Electric flux is defined by the relation
A. E.A.
B. E x A
C. E/A
D. none of these
7 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
8 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
9 One electron volt is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018 eV
C. 1.6 x 1018 eV
D. 6.25 x 1019eV
10 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge

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