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

One electron volt is equal to

Question # 2

The electric field will be uniform

Question # 3

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

Question # 4

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Question # 5

The unit of conductance is

Question # 6

Resistor is a device which convert electric energy to

Question # 7

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

Question # 8

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 9

Cause of heat production in a current carrying conductor is

Question # 10

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 11

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

Question # 12

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

Question # 13

The nature of capacity of electrostatic capacitor depends on

Question # 14

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

Question # 15

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 16

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

Question # 17

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

Question # 18

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 19

The electric flux from a closed surface

Question # 20

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 21

The value of electrical constant of proportionality k is

Question # 22

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 23

Battery is charged in motor cars, which is based on

Question # 24

The resistance of the given conductor can be increased by

Question # 25

The concept of field theory was put forward by

Question # 26

One coulomb of charge is created by

Question # 27

Resistance of a conductor depends upon

Question # 28

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 29

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 30

Surface density of charge is defined as

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called
A. Time constant
B. Decay constant
C. None of these
D. All of above
2 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
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 106electrons are moving through a wire per second, the current developed is
A. 1.6 x 10-19
B. 1 A
C. 1.6 x 10-15 A
D. 106A
5 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
6 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m
7 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
8 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
9 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
10 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
A. 2 R
B. R/4
C. R/2
D. R

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