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 unit of resistivity is

Question # 2

Thermocouple is an arrangement of two different metals

Question # 3

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 4

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 5

Specific resistance of a wire depends upon

Question # 6

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

Question # 7

The SI unit of capacitance is

Question # 8

One electron volt is equal to

Question # 9

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 10

The electric flux from a closed surface

Question # 11

The charge per unit time through any cross-section of a conductor is called

Question # 12

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 13

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

Question # 14

The electric lines of force are

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 speed of randomly moving electrons depends upon

Question # 17

Capacitance of two or more capacitors

Question # 18

The earth's potential is taken as

Question # 19

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 20

The unit of conductance is

Question # 21

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

Question # 22

The SI unit of electric flux is

Question # 23

An electric charge at rest is

Question # 24

The unit of intensity of electric field is

Question # 25

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 26

Ohm is the unit of

Question # 27

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 28

Which one of the following causes production of heat when current is set up in a wire?

Question # 29

At any point on the right bisector of the line joining two equal and opposite charges

Question # 30

Electron volt is the unit of

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Some charge is being given to a conductor. Then its potential
A. Is maximum at surface
B. Is maximum at centre
C. Is remain same throughout the conductor
D. Is maximum somewhere between surface and centre
2 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
3 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
A. 10μF
B. 20μF
C. 30μF
D. 15μF
4 A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is
A. Charge Q
B. Potential V
C. Capacity
D. Energy U
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 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
7 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
8 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
9 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
10 The resistance of the given conductor can be increased by
A. Increasing the area
B. Changing resistivity
C. Decreasing the length
D. None of the above because change does not matter because in any case the volume remains the same

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