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

Question # 2

Resistance of a conductor is increased, the currant will

Question # 3

The graphical representation of ohm's law is

Question # 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

Question # 5

The electric flux from a closed surface

Question # 6

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

Question # 7

The concept of field theory was put forward by

Question # 8

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

Question # 9

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 10

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 # 11

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

Question # 12

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 # 13

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 14

One coulomb per second is equal to

Question # 15

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 # 16

The unit of conductance is

Question # 17

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 18

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 # 19

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

Question # 20

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 21

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 22

The charge carriers in electrolyte are positive and negative

Question # 23

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

Question # 24

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

Question # 25

The liquid which conduct current is known as

Question # 26

The earth's potential is taken as

Question # 27

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 28

The thermistors are usually made of

Question # 29

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

Question # 30

The fractional change in resistance per kelvin is known as

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
2
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
3 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
4 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
5 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
6 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
7 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
8 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
9 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
A. 3.9
B. 4
C. 4.2
D. 6
10 The value of electrical constant of proportionality k is
A. 9 x 109Nm2C-2
B. 9 x 10-9Nm2C-2
C. 9 x 1010Nm2C2
D. 9.85 x 10-12N-1C-2

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  • fun day

    fun day

    02 Mar 2023

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    Hira arif

    18 Jun 2019

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    27 Apr 2019

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    baber

    15 Feb 2019

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