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

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

Question # 2

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 # 3

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 4

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

Question # 5

The dot product of electric field intensity E and vector area A is called

Question # 6

Potentiometer is more sensitive than voltmeter, because

Question # 7

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 8

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 # 9

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 10

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 11

Ohm's law states that

Question # 12

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

Question # 13

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
2 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m
3 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
4 The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is
A. 21 x 103+ 10%
B. 23 x 101+ 10%
C. 21 x 103+ 5%
D. 12 x 103+ 5%
5 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
6 The resistance of an incandescent lamp is
A. Smaller when switched on
B. Greater when switched off
C. The same whether it is switch off or switch on
D. Greater when switched on
7 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above
8 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
9 Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
A. 711μF
B. 611μF
C. 811μF
D. 511μF
10 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons

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