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

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

Question # 2

Electric generators which convert mechanical energy into

Question # 3

Cause of heat production in a current carrying conductor is

Question # 4

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 5

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

Question # 6

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

Question # 7

Specific resistance of a wire depends upon

Question # 8

Which one of the following causes production of heat when current is set up in a wire?

Question # 9

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 10

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

Question # 11

Battery is charged in motor cars, which is based on

Question # 12

Resistance of a conductor is increased, the currant will

Question # 13

The unit of resistivity is

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become
A. -10 N
B. +10 N
C. +20 N
D. -20 N
2 The electric field due to an infinite long thin wire at a distance R varies as
A. 1/R
B. 1/R2
C. R
D. R2
3 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
4 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
5 The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00
6 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
7 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
8 The charge per unit time through any cross-section of a conductor is called
A. capacitance
B. electric power
C. current
D. potential difference
9 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
10 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry

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