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 earth's potential is taken as

Question # 2

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 # 3

106electrons are moving through a wire per second, the current developed is

Question # 4

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

Question # 5

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

Question # 6

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 7

Solar cell converts sunlight directly into

Question # 8

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

Question # 9

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 10

One coulomb of charge is created by

Question # 11

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 12

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 13

Physicist George Simon ohm was a

Question # 14

The concept of field theory was put forward by

Question # 15

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 16

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

Question # 17

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 18

Ohm's law states that

Question # 19

Electric potential of earth is taken to be zero because the earth is good

Question # 20

The relation between charge 'Q' and current 'I' is given by

Question # 21

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 # 22

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

Question # 23

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

Question # 24

Ohm is the unit of

Question # 25

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

Question # 26

Specific resistance of a wire depends upon

Question # 27

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

Question # 28

Coulomb force, when any material medium is placed between two charges

Question # 29

The SI unit of current is

Question # 30

Which one of the following has larger value of relative permitivity Erat room temperature?

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
3 The electric field will be uniform
A. Near a positive point charge
B. Near a negative point charge
C. Between two oppositely charged parallel metal plates
D. None of above
4 A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
5 Which one of the following causes production of heat when current is set up in a wire?
A. Fall of electrons from higher orbits to lower orbits
B. Inter-atomic collisions
C. Inter-electron collisions
D. Collisions of conduction electron with atoms
6 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
7 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
8 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
9 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
A. Negative
B. Positive
C. Infinite
D. Zero
10 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

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