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

Question # 2

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 3

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

Question # 4

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 # 5

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 6

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

Question # 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

Question # 8

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

Question # 9

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 10

Which one of the following is the unit of electric field intensity

Question # 11

The electric field due to an infinite long thin wire at a distance R varies as

Question # 12

One electron volt is equal to

Question # 13

The minimum charge on any object can not be less than

Question # 14

The graphical representation of ohm's law is

Question # 15

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
2 A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to
A. -q
B. +q
C. -2q
D. +4q
3 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
4 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
5 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
6 The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will
A. Increase
B. Decrease
C. Remain F
D. Become 10F/9
7 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
8 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
9 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
10 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W

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