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

Capacitance of two or more capacitors

Question # 2

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

Question # 3

In a charged capacitor the energy is stored in

Question # 4

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 5

The SI unit of permitivity is

Question # 6

Potentiometer is more sensitive than voltmeter, because

Question # 7

Electron volt is the unit of

Question # 8

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

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

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 # 11

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 12

Electric flux is defined by the relation

Question # 13

The dot product of electric field intensity E and vector area A is called

Question # 14

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

Question # 15

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

Question # 16

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 17

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 # 18

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 19

The graphical representation of ohm's law is

Question # 20

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

Question # 21

Heating effect caused by an electric circuit is written

Question # 22

The SI unit of conductivity is

Question # 23

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 # 24

The capacity of a parallel plat capacitor depends on the

Question # 25

The value of electrical constant of proportionality k is

Question # 26

The thermistors are usually made of

Question # 27

The potential difference across each resistance in series combination is

Question # 28

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Question # 29

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 30

Thermocouple is an arrangement of two different metals

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
2 A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)
A. 2
B. 1
C. 0.5
D. 1.5
3 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
4 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
5 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
6 A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be
A. 2 R
B. R
C. R/2
D. R/4
7 Resistance of a conductor depends upon
A. the quantity of current passing through it
B. the voltage applied between its end
C. its dimensions, physical state and nature of its material
D. all of the above
8 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
9 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
A. 120 C
B. 240 C
C. 20 C
D. 4 C
10 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

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