ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

The SI unit of capacitance is

Question # 2

The SI unit of electric flux is

Question # 3

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

Question # 4

Specific resistance of a wire depends upon

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

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 # 7

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 8

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Question # 9

The electric field will be uniform

Question # 10

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

Question # 11

The electric lines of force are

Question # 12

Physicist George Simon ohm was a

Question # 13

The electrode connected with the positive terminal of the current source is called

Question # 14

The conductivity of a superconductor is

Question # 15

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 16

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

Question # 17

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 # 18

Electron volt is the unit of.

Question # 19

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 20

The liquid which conduct current is known as

Question # 21

Electric flux is defined by the relation

Question # 22

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

Question # 23

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

Question # 24

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 25

The ohm's is defined as

Question # 26

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

Question # 27

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

Question # 28

The fractional change in resistance per kelvin is known as

Question # 29

The minimum charge on any object can not be less than

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape
2 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
3 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
4 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
A. negative charges
B. positive charges
C. protons
D. electrons
5 The current through a metallic conductor is due to the motion of
A. protons
B. neutrons
C. electrons
D. free electrons
6 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
7 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
8 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
9 The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is
A. 21 x 103+ 10%
B. 23 x 101+ 10%
C. 21 x 103+ 5%
D. 12 x 103+ 5%
10 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1

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