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

If electric and gravitational force on an electron in a uniform electric field will be

Question # 2

Battery is charged in motor cars, which is based on

Question # 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

Question # 4

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

Question # 5

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 # 6

One coulomb per second is equal to

Question # 7

Resistor is a device which convert electric energy to

Question # 8

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

Question # 9

Which one of the following is the unit of electric field intensity

Question # 10

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 11

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 12

The electric field intensity at a point due to a point charge

Question # 13

One coulomb of charge is created by

Question # 14

The unit of resistivity is

Question # 15

Coulomb's force between two point charges depends upon

Question # 16

An electric charge at rest is

Question # 17

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 18

The electric lines of force are

Question # 19

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 # 20

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

Question # 21

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

Question # 22

Electron volt is the unit of

Question # 23

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 24

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

Question # 25

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 26

One joule is equal to

Question # 27

Ohm's law states that

Question # 28

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

Question # 29

The fractional change in resistance per kelvin is known as

Question # 30

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
2 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
3 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above
4 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
5 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)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
6 One joule is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018eV
C. 1.6 x 1818eV
D. 6.25 x 1019eV
7 The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44
8 A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?
A. 108 g
B. 10.8 g
C. 0.8 g
D. 108/0.8 g
9 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
10 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W

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