ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

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

Question # 2

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 3

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 # 4

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 5

The SI unit of electric field intensity is

Question # 6

Electric potential of earth is taken to be zero because the earth is good

Question # 7

Coulomb's force between two point charges depends upon

Question # 8

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 # 9

The fractional change in resistance per kelvin is known as

Question # 10

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

Question # 11

An electric charge at rest is

Question # 12

The electric field will be uniform

Question # 13

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

Question # 14

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

Question # 15

The capacitance of a parallel plate capacitor depends upon

Question # 16

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 # 17

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

Question # 18

Ohm's law states that

Question # 19

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

Question # 20

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 21

The SI unit of conductivity is

Question # 22

Specific resistance of a wire depends upon

Question # 23

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 24

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

Question # 25

The unit of intensity of electric field is

Question # 26

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 27

Ohm established a relation between

Question # 28

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 29

One coulomb of charge is created by

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
2 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
3 A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is
A. C
B. C/2
C. Zero
D. 2C
4 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
5 A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
A. Electric potential at the surface of the cube is zero
B. Electric potential within the cube is zero
C. Electric filed is normal to the surface of the cube
D. Electric filed varies within the cube
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
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
7 Ohm is the unit of
A. current
B. capacitance
C. energy
D. resistance
8 The concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday
9 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
10 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase

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