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 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 2

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

Question # 3

Free electrons are

Question # 4

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 5

Current provided by a battery is maximum when

Question # 6

The SI unit of electric field intensity is

Question # 7

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 8

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 9

The electric flux from a closed surface

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Electric flux is defined by the relation

Question # 15

The unit of intensity of electric field is

Question # 16

Potentiometer is more sensitive than voltmeter, because

Question # 17

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 18

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 19

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

Question # 20

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 # 21

The relation V = IR represents

Question # 22

Electron volt is the unit of.

Question # 23

The electric intensity at infinite distance from the point charge will be

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Ohm is the unit of

Question # 29

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 # 30

The nature of capacity of electrostatic capacitor depends on

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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 Heating effect caused by an electric circuit is written
A. H = I2Rt
B. H = I2R
C. H = IR2t
D. H = IR2
3 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
A. Four-fold
B. One-half
C. One-fourth
D. Zero
4 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola
5 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
6 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
A. 5μF
B. 20μF
C. 10μF
D. 15μF
7 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
8 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
9 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
10 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons

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