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

Which of the following represents an electric current?

Question # 2

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

Question # 3

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

Question # 4

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 5

Equal charges are given to two spheres of different radii. The potential will

Question # 6

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

Question # 7

One electron volt is equal to

Question # 8

The charge carriers in electrolyte are positive and negative

Question # 9

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

Question # 10

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 11

The conductivity of a superconductor is

Question # 12

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

Question # 13

Ohm is the unit of

Question # 14

The thermistors are usually made of

Question # 15

If electric and gravitational force on an electron in a uniform electric field will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 A condenser of capacity 50μF is charged to 10 V.The energy stored is
A. 1.25 x 10-3J
B. 3.75 x 10-3J
C. 2.5 x 10-3J
D. 5 x 10-3J
3 If a 40 watt light bulb burns for 2 hours. how much heat is generated
A. 288 x 103J
B. 288 x 108J
C. 288 x 105J
D. 288 x 106J
4 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
5 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
6 The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
7 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
8 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
9 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
10 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None

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