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 one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 2

One coulomb per second is equal to

Question # 3

The unit of resistance is

Question # 4

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 # 5

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 6

The potential difference across each resistance in series combination is

Question # 7

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

Question # 8

The minimum charge on any object can not be less than

Question # 9

The resistance of an incandescent lamp is

Question # 10

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

Question # 11

An electric charge at rest is

Question # 12

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

Question # 13

One electron volt is equal to

Question # 14

The current through a metallic conductor is due to the motion of

Question # 15

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 16

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 17

Ohm's law states that

Question # 18

The capacitance of a parallel plate capacitor depends upon

Question # 19

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 # 20

Capacitance of two or more capacitors

Question # 21

The relation V = IR represents

Question # 22

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 23

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 # 24

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 25

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

Question # 26

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 27

One joule is equal to

Question # 28

The nature of capacity of electrostatic capacitor depends on

Question # 29

Which of the following represents an electric current?

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
A. V/e
B. eV
C. e/V
D. V
2 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
3 A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?
A. 3 x 1020
B. 3 x 1010
C. 6 x 1020
D. 6 x 1010
4 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
5 If the two charges in Coulomb's law have double distance between them, then electric force
A. Becomes two-fold
B. Becomes four-fold
C. Remains the same
D. None of these
6 If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?
A. 60 W bulb
B. 100 W bulb
C. Both equally
D. None of these
7 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
8 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
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape
9 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
10 A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
A. 1310 W
B. 670 W
C. 810 W
D. 1210 W

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