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 SI unit of electric field intensity is

Question # 2

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

Question # 3

Electric flux is defined by the relation

Question # 4

The ohm's is defined as

Question # 5

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

Question # 6

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 # 7

At any point on the right bisector of the line joining two equal and opposite charges

Question # 8

The SI unit of capacitance is

Question # 9

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 10

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

Question # 11

The SI unit of conductivity is

Question # 12

Ohm established a relation between

Question # 13

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

Question # 14

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

Question # 15

One electron volt is equal to

Question # 16

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)

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

The SI unit of current is

Question # 21

The charge carriers in gases are

Question # 22

The conductivity of a superconductor is

Question # 23

The minimum charge on any object can not be less than

Question # 24

Heating effect caused by an electric circuit is written

Question # 25

The resistance of the given conductor can be increased by

Question # 26

The capacity of a parallel plat capacitor depends on the

Question # 27

The unit of intensity of electric field is

Question # 28

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 29

In a charged capacitor the energy is stored in

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Potentiometer is more sensitive than voltmeter, because
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
2 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
3 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
4 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
5 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
6 At ordinary temperature, an increase in temperature increases the conductivity of
A. Conductor
B. Semiconductor
C. Insulator
D. Alloy
7 If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us
A. parabola
B. straight line
C. hyper bola
D. ellipse
8 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
9 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
A. Four-fold
B. One-half
C. One-fourth
D. Zero
10 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite

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