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

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

Question # 2

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

Question # 3

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

Question # 4

The thermistors are usually made of

Question # 5

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 # 6

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 # 7

The electric flux is linked with a surface will be maximum when

Question # 8

Resistance of a conductor is increased, the currant will

Question # 9

The potential difference across each resistance in series combination is

Question # 10

Equal charges are given to two spheres of different radii. The potential will

Question # 11

The nature of capacity of electrostatic capacitor depends on

Question # 12

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

Question # 13

The charge carriers in gases are

Question # 14

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
2 Consider a spherical shell of metal at he centre of which a positive point charge is kept
A. The electric filed is zero outside the shell
B. The electric field is zero everywhere
C. The electric field is zero in the region inside the shell
D. The electric field is non-zero in both regions outside and inside the shell
3 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
4 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola
5 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
6 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
7 A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is
A. Charge Q
B. Potential V
C. Capacity
D. Energy U
8 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
9 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
10 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
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V

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