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

Question # 2

The nature of capacity of electrostatic capacitor depends on

Question # 3

The electric flux is linked with a surface will be maximum when

Question # 4

In a voltmeter the conduction takes place due to

Question # 5

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 6

Resistor is a device which convert electric energy to

Question # 7

Specific resistance of a wire depends upon

Question # 8

Free electrons are

Question # 9

The conductivity of a superconductor is

Question # 10

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

Question # 11

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 12

An electric charge at rest is

Question # 13

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 # 14

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

Question # 15

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

Question # 16

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 17

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

Question # 18

The speed of randomly moving electrons depends upon

Question # 19

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

Question # 20

Surface density of charge is defined as

Question # 21

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

Question # 22

One coulomb per second is equal to

Question # 23

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

Question # 24

Current provided by a battery is maximum when

Question # 25

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

Question # 26

The SI unit of electric flux is

Question # 27

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 28

Resistance of a conductor is increased, the currant will

Question # 29

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

Question # 30

The relation V = IR represents

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
2 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
3 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
4 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
5 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
6 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
7 An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
A. V/e
B. eV
C. e/V
D. V
8 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
9 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
10 A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?
A. 3 x 1020
B. 3 x 1010
C. 6 x 1020
D. 6 x 1010

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