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

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

Question # 2

The nature of capacity of electrostatic capacitor depends on

Question # 3

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 4

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 # 5

One coulomb of charge is created by

Question # 6

The resistance of an incandescent lamp is

Question # 7

The graphical representation of ohm's law is

Question # 8

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

Question # 9

Physicist George Simon ohm was a

Question # 10

Which of the following represents an electric current?

Question # 11

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

Question # 12

Ohm's law states that

Question # 13

106electrons are moving through a wire per second, the current developed is

Question # 14

The relation V = IR represents

Question # 15

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

Question # 16

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

Question # 17

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 18

Ohm established a relation between

Question # 19

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

Question # 20

The minimum charge on any object can not be less than

Question # 21

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 22

The charge carriers in electrolyte are positive and negative

Question # 23

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 24

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

Question # 25

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 26

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

Question # 27

Surface density of charge is defined as

Question # 28

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
2 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
3 A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
A. Electric potential at the surface of the cube is zero
B. Electric potential within the cube is zero
C. Electric filed is normal to the surface of the cube
D. Electric filed varies within the cube
4 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
5 The speed of randomly moving electrons depends upon
A. pressure
B. volume
C. temperature
D. mass
6 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
A. Negative
B. Positive
C. Infinite
D. Zero
7 For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
8 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
9 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called
A. Time constant
B. Decay constant
C. None of these
D. All of above
10 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry

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