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

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

Question # 2

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

Question # 3

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 4

An electric charge at rest is

Question # 5

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 6

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

Question # 7

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 8

One joule is equal to

Question # 9

The unit of conductance is

Question # 10

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

Question # 11

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

Question # 12

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 13

Resistance of a conductor is increased, the currant will

Question # 14

The SI unit of current is

Question # 15

Which of the following represents an electric current?

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
2 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
3 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
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V
4 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
5 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
6 The unit of intensity of electric field is
A. newton/coluomb
B. jule/coluomb
C. volt x metre
D. newton/metre
7 Electric potential of earth is taken to be zero because the earth is good
A. Semiconductor
B. Conductor
C. Insulator
D. Dielectric
8 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
9 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
10 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

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