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

Ohm established a relation between

Question # 2

The speed of randomly moving electrons depends upon

Question # 3

Electric generators which convert mechanical energy into

Question # 4

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 # 5

Resistor is a device which convert electric energy to

Question # 6

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

Question # 7

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

Question # 8

Physicist George Simon ohm was a

Question # 9

The electric field will be uniform

Question # 10

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

Question # 11

Solar cell converts sunlight directly into

Question # 12

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

Question # 13

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

Question # 14

The earth's potential is taken as

Question # 15

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 # 16

The energy stored in a charge capacitor

Question # 17

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 # 18

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

Question # 19

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

Question # 20

The charge carriers in gases are

Question # 21

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 # 22

The graphical representation of ohm's law is

Question # 23

The resistivity of a substance depends upon the

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

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 26

The resistance of a conductor does not depend on its

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 value of electrical constant of proportionality k is

Question # 29

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

Question # 30

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The resistivity of a substance depends upon the
A. length
B. mass
C. area
D. temperature
2 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
3 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
4 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
5 A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?
A. 3 x 1020
B. 3 x 1010
C. 6 x 1020
D. 6 x 1010
6 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
A. 180 watt
B. 10 watt
C. 20 watt
D. 60 watt
7 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature
8 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
9 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
10 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

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