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 hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 2

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

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

Resistor is a device which convert electric energy to

Question # 5

The capacitance of a parallel plate capacitor depends upon

Question # 6

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

Question # 7

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 8

The ohm's is defined as

Question # 9

An electric charge at rest is

Question # 10

The conductivity of a superconductor is

Question # 11

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

Question # 12

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

Question # 13

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 14

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

Question # 15

Ohm is the unit of

Question # 16

The minimum charge on any object can not be less than

Question # 17

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 # 18

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

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

Question # 21

Electric potential of earth is taken to be zero because the earth is good

Question # 22

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 23

One joule is equal to

Question # 24

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

Question # 25

The resistance of a conductor does not depend on its

Question # 26

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

Question # 27

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 28

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 29

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 # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. 3.9
B. 4
C. 4.2
D. 6
2 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
3 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
4 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
5 The electric intensity outside the two oppositely charged parallel metal plates is
A. Maximum
B. Minimum
C. Zero
D. Infinite
6 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
7 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
8 Which one of the following has larger value of relative permitivity Erat room temperature?
A. Vaccum
B. Air
C. Glass
D. Water
9 Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?
A. 3RΩ
B. 2R/4Ω
C. R/3Ω
D. 2R/3Ω
10 If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt

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