ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	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	A. 7.20 N B. 11.25 N C. 22.50 N D. 45.00
2	The resistance of the given conductor can be increased by	A. Increasing the area B. Changing resistivity C. Decreasing the length D. None of the above because change does not matter because in any case the volume remains the same
3	If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?	A. 60 W bulb B. 100 W bulb C. Both equally D. None of these
4	The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of	A. negative charges B. positive charges C. protons D. electrons
5	Electric generators which convert mechanical energy into	A. solar energy B. thermal energy C. kinetic energy D. electrical energy
6	Surface density of charge is defined as	A. Charge per unit volume B. Charge per unit length C. Charge per unit area D. Charge per unit mass
7	If 2.2 kilowatt power is transmitted through a 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. 5μF B. 10μF C. 3μF D. 6μF
9	Capacitance of two or more capacitors	A. Increases in series combination B. Increases in parallel combination C. Remains unchanged D. None of the above
10	The energy stored in a charge capacitor	A. 1/2CV² B. 1/2C²V C. 1/2C/V² D. None of these

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ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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

Physics ECAT Pre Engineering Chapter 12 Electrostatics

The electric intensity outside the two oppositely charged parallel metal plates is

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

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Consider a spherical shell of metal at he centre of which a positive point charge is kept

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

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

The capacitance of a parallel plate capacitor depends upon

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

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

The capacity of a parallel plat capacitor depends on the

A condenser of capacity 50μF is charged to 10 V.The energy stored is

The charge carriers in gases are

Ohm's law states that

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

The resistivity of a substance depends upon the

The unit of resistivity is

The SI unit of conductivity is

Which of the following represents an electric current?

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

The SI unit of electric field intensity is

The SI unit of capacitance is

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

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

Free electrons are

The electric field intensity at a point due to a point charge

The earth's potential is taken as

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

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)

Cause of heat production in a current carrying conductor is

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

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ECAT Physics Chapter 12 Important MCQ's

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