ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

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

Question # 2

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 # 3

An electric charge at rest is

Question # 4

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 5

The SI unit of electric flux is

Question # 6

The unit of resistance is

Question # 7

The potential difference across each resistance in series combination is

Question # 8

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

Question # 9

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 10

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 11

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 # 12

The capacitance of a parallel plate capacitor depends upon

Question # 13

Which one of the following is the unit of electric field intensity

Question # 14

Thermocouple is an arrangement of two different metals

Question # 15

The value of electrical constant of proportionality k is

Question # 16

Electric potential of earth is taken to be zero because the earth is good

Question # 17

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Question # 18

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 # 19

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 20

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

Question # 21

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 22

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

Question # 23

The unit of conductance is

Question # 24

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

Question # 25

The electric flux from a closed surface

Question # 26

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

Question # 27

The energy stored in a charge capacitor

Question # 28

The electrode connected with the positive terminal of the current source is called

Question # 29

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

Question # 30

Capacitance of two or more capacitors

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2
2 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
3 Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape
4 Resistance of a conductor is increased, the currant will
A. Decrease
B. Increase
C. Remain the same
D. None of these
5 Cause of heat production in a current carrying conductor is
A. Collisions of free electrons with one another
B. High drift speed of free electrons
C. Collisions of free electrons with atoms or ions of conductor
D. High resistance value
6 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
7 If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
8 A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is
A. C
B. C/2
C. Zero
D. 2C
9 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
10 A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be
A. 5 volt
B. 3 volt
C. 15 volt
D. 9 volt

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