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

The concept of field theory was put forward by

Question # 2

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 3

Resistance of a conductor is increased, the currant will

Question # 4

The earth's potential is taken as

Question # 5

The SI unit of capacitance is

Question # 6

Ohm established a relation between

Question # 7

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

Question # 8

The minimum charge on any object can not be less than

Question # 9

One electron volt is equal to

Question # 10

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

Question # 11

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 12

One coulomb of charge is created by

Question # 13

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 14

Resistance of a conductor depends upon

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
2 The resistivity of a substance depends upon the
A. length
B. mass
C. area
D. temperature
3 A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is
A. 10μF
B. 20μF
C. 30μF
D. 15μF
4 A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?
A. 108 g
B. 10.8 g
C. 0.8 g
D. 108/0.8 g
5 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
6 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy
A. Ve
B. V/e
C. e/V
D. 2Ve
7 The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is
A. 10Ω
B. 20Ω
C. 30Ω
D. 40Ω
8 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
9 The value of electrical constant of proportionality k is
A. 9 x 109Nm2C-2
B. 9 x 10-9Nm2C-2
C. 9 x 1010Nm2C2
D. 9.85 x 10-12N-1C-2
10 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV

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