ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

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

Question # 2

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 # 3

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 4

Some charge is being given to a conductor. Then its potential

Question # 5

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 # 6

The resistance of an incandescent lamp is

Question # 7

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

Question # 8

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

Question # 9

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The capacitance of a parallel plate capacitor depends upon

Question # 14

The resistivity of a substance depends upon the

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t
3 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
4 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
5 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?
A. 60 W bulb
B. 100 W bulb
C. Both equally
D. None of these
6 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
7 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
8 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
9 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates
10 The concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday

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