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

The resistance of the given conductor can be increased by

Question # 2

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

Question # 3

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 4

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 # 5

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

Question # 6

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

Question # 7

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

Question # 8

Resistance of a conductor depends upon

Question # 9

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 10

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 11

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

Question # 12

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 13

The resistance of a conductor does not depend on its

Question # 14

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?

Question # 15

The SI unit of permitivity is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt
2 The resistance of the given conductor can be increased by
A. Increasing the area
B. Changing resistivity
C. Decreasing the length
D. None of the above because change does not matter because in any case the volume remains the same
3 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
A. Q=V/C
B. Q=C/V
C. Q=1/2CV
D. Q=CV
4 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
5 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m
6 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to
A. One joule
B. One erg
C. One electron volt
D. None of these
7 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
8 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
9 If the length of the conductor is double and its cross sectional area is halved, its conductance will
A. Increase four fold
B. Become one-fourth
C. Become one-half
D. Remains unchanged
10 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

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