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 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 # 2

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

Question # 3

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 4

The graphical representation of ohm's law is

Question # 5

The electric lines of force are

Question # 6

The unit of conductance is

Question # 7

Which one of the following causes production of heat when current is set up in a wire?

Question # 8

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 9

If electric and gravitational force on an electron in a uniform electric field will be

Question # 10

Electric generators which convert mechanical energy into

Question # 11

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

Question # 12

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 13

The fractional change in resistance per kelvin is known as

Question # 14

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

Question # 15

Resistor is a device which convert electric energy to

Question # 16

The electric flux from a closed surface

Question # 17

The electric intensity at infinite distance from the point charge will be

Question # 18

The charge carriers in electrolyte are positive and negative

Question # 19

The capacitance of a parallel plate capacitor depends upon

Question # 20

The value of electrical constant of proportionality k is

Question # 21

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 22

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

Question # 23

Ohm is the unit of

Question # 24

The earth's potential is taken as

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

The resistivity of a substance depends upon the

Question # 29

The electric field intensity at a point due to a point charge

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
2
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
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)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
4 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
5 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
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
A. 10μF
B. 20μF
C. 30μF
D. 15μF
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 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
9 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
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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