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 point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Question # 2

Current provided by a battery is maximum when

Question # 3

An electric charge at rest is

Question # 4

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 # 5

Magnetic effect at a point caused due to flow a current depend upon the

Question # 6

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

Question # 7

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Question # 8

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 # 9

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 10

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 11

The current through a metallic conductor is due to the motion of

Question # 12

The charge per unit time through any cross-section of a conductor is called

Question # 13

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

Question # 14

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 15

The SI unit of electric field intensity is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
A. V/e
B. eV
C. e/V
D. V
2 The resistivity of a substance depends upon the
A. length
B. mass
C. area
D. temperature
3 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
4 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
5 The SI unit of electric flux is
A. Weber
B. Nm2C-1
C. NmC-1
D. Nm-2C
6 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
7 In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A
8 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
9 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1
10 A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy
A. 200 J
B. 100 J
C. 1000 J
D. 400 J

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