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 resistivity of a substance depends upon the

Question # 2

The concept of field theory was put forward by

Question # 3

The energy stored in a charge capacitor

Question # 4

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 5

One joule is equal to

Question # 6

Potentiometer is more sensitive than voltmeter, because

Question # 7

The capacity of a parallel plat capacitor depends on the

Question # 8

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 # 9

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 10

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 11

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

Question # 12

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 # 13

Resistance of a conductor depends upon

Question # 14

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

Question # 15

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 # 16

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 17

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 18

Physicist George Simon ohm was a

Question # 19

The minimum charge on any object can not be less than

Question # 20

In a voltmeter the conduction takes place due to

Question # 21

The electrode connected with the positive terminal of the current source is called

Question # 22

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 23

The SI unit of electric flux is

Question # 24

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 25

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

Magnetic effect at a point caused due to flow a current depend upon the

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
3 The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00
4 A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then
A. The charge in the plates reduces and potential difference increase
B. Potential difference between the plates increase, stored energy decreases and charge remains the same
C. Potential difference between the plates decreases and charge remains unchanged
D. None of the above
5 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
6 The current through a metallic conductor is due to the motion of
A. protons
B. neutrons
C. electrons
D. free electrons
7 An electric charge at rest is
A. Only an electric field
B. Only a magnetic field
C. Both electric and magnetic fields
D. None of the above
8 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
9 The conductivity of a superconductor is
A. Infinite
B. Very large
C. Very small
D. Zero
10 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola

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