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

The electric lines of force are

Question # 2

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

Question # 3

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

Question # 4

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 # 5

Coulomb's force between two point charges depends upon

Question # 6

The electric flux from a closed surface

Question # 7

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

Question # 8

Capacitance of two or more capacitors

Question # 9

Which one of the following causes production of heat when current is set up in a wire?

Question # 10

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 # 11

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

Question # 12

The SI unit of current is

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 17

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 18

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

Question # 19

The unit of conductance is

Question # 20

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

Question # 21

One coulomb of charge is created by

Question # 22

The SI unit of electric flux is

Question # 23

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 # 24

The charge carriers in gases are

Question # 25

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

Question # 26

An electric charge at rest is

Question # 27

Resistor is a device which convert electric energy to

Question # 28

106electrons are moving through a wire per second, the current developed is

Question # 29

The unit of resistivity is

Question # 30

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
2 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
3 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
4 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be
A. 6 ohm
B. 4 ohm
C. zero ohm
D. 1.33 ohm
5 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
6 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
7 A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
8 Free electrons are
A. tightly bound
B. fixed
C. loosely bound
D. tightly fixed
9 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
10 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

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