ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 2

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

Question # 3

One coulomb of charge is created by

Question # 4

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 5

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

Question # 6

The electric flux from a closed surface

Question # 7

The capacity of a parallel plat capacitor depends on the

Question # 8

Potentiometer is more sensitive than voltmeter, because

Question # 9

The unit of conductance is

Question # 10

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 # 11

Electric generators which convert mechanical energy into

Question # 12

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 13

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 14

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 15

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
2 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
3 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
4 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
5 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
6 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A. Increases
B. Decreases
C. Remain unchanged
D. Becomes infinite
7 The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
8 A conducting wire is drawn to double its length. Final resistivity of the material will be
A. Double of the original one
B. Half of the original one
C. One fourth of the original one
D. Same as original one
9 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
10 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t

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