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

Electric flux is defined by the relation

Question # 2

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

Question # 3

Capacitance of two or more capacitors

Question # 4

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

Question # 5

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

Question # 6

The speed of randomly moving electrons depends upon

Question # 7

The unit of conductance is

Question # 8

The SI unit of permitivity is

Question # 9

Cause of heat production in a current carrying conductor is

Question # 10

Heating effect caused by an electric circuit is written

Question # 11

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

Question # 12

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

Question # 13

The nature of capacity of electrostatic capacitor depends on

Question # 14

Which one of the following is the unit of electric field intensity

Question # 15

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

Question # 16

The electric flux is linked with a surface will be maximum when

Question # 17

The fractional change in resistance per kelvin is known as

Question # 18

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

Question # 19

Ohm established a relation between

Question # 20

The resistivity of a substance depends upon the

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Electron volt is the unit of.

Question # 25

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 26

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

Question # 27

The earth's potential is taken as

Question # 28

The SI unit of capacitance is

Question # 29

The potential difference across each resistance in series combination is

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one
2 The resistance of a conductor does not depend on its
A. mass
B. resistivity
C. length
D. cross-sectional area
3 At any point on the right bisector of the line joining two equal and opposite charges
A. At electric field is zero
B. The electric potential is zero
C. The electric potential decreases with increasing distance from the centre
D. The electric field is perpendicular to the line joining the charges
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 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
6 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
7 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω
8 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
9 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
10 A condenser of capacity 50μF is charged to 10 V.The energy stored is
A. 1.25 x 10-3J
B. 3.75 x 10-3J
C. 2.5 x 10-3J
D. 5 x 10-3J

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