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

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 2

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 # 3

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 4

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 5

The SI unit of conductivity is

Question # 6

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 7

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

Question # 8

One joule is equal to

Question # 9

The minimum charge on any object can not be less than

Question # 10

The potential difference across each resistance in series combination is

Question # 11

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 12

The charge per unit time through any cross-section of a conductor is called

Question # 13

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 # 14

Electron volt is the unit of.

Question # 15

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

Question # 16

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 # 17

The earth's potential is taken as

Question # 18

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

Question # 19

The capacity of a parallel plat capacitor depends on the

Question # 20

One electron volt is equal to

Question # 21

The unit of resistivity is

Question # 22

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

Question # 23

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

Question # 24

The nature of capacity of electrostatic capacitor depends on

Question # 25

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 26

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 27

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

Question # 28

The SI unit of capacitance is

Question # 29

Electric flux is defined by the relation

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
3 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
4 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
5 Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become
A. -10 N
B. +10 N
C. +20 N
D. -20 N
6 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
7 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
8 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
9 Magnetic effect at a point caused due to flow a current depend upon the
A. Quantity of current
B. Distance from current
C. Both the quantity of current and distance from current element
D. None of the all
10 The resistance of the given conductor can be increased by
A. Increasing the area
B. Changing resistivity
C. Decreasing the length
D. None of the above because change does not matter because in any case the volume remains the same

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