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

Potentiometer is more sensitive than voltmeter, because

Question # 2

In a voltmeter the conduction takes place due to

Question # 3

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

Question # 4

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

Question # 5

The potential difference across each resistance in series combination is

Question # 6

One electron volt is equal to

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

One coulomb per second is equal to

Question # 9

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

Question # 10

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 11

Electron volt is the unit of

Question # 12

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

The resistance of the given conductor can be increased by

Question # 17

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

Question # 18

The charge carriers in electrolyte are positive and negative

Question # 19

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

Question # 20

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 21

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 22

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 23

Battery is charged in motor cars, which is based on

Question # 24

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

Question # 25

One coulomb of charge is created by

Question # 26

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

Question # 27

The unit of resistance is

Question # 28

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?

Question # 29

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
A. 10-1A
B. 10-2A
C. 10-4A
D. 1 mA
3 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
4 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
5 The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of
A. negative charges
B. positive charges
C. protons
D. electrons
6 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
7 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
8 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
9 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
10 Equal charges are given to two spheres of different radii. The potential will
A. Be more on the smaller sphere
B. Be more on the bigger sphere
C. Be equal on both the sphere
D. Depend on the nature of the material of the sphere

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