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 relation between the charge Q of a parallel plate capacitor and the P.D between its plates is	A. Q=V/C B. Q=C/V C. Q=1/2CV D. Q=CV
2	10⁶electrons are moving through a wire per second, the current developed is	A. 1.6 x 10^-19 B. 1 A C. 1.6 x 10^-15A D. 10⁶A
3	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
4	The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is	A. 10 KJ B. 5 KJ C. 2 KJ D. 1 KJ
5	In a charged capacitor the energy is stored in	A. Both in positive and negative charges B. Positive charges C. The edges of the capacitor plates D. The electric field between the plates
6	If a 40 watt light bulb burns for 2 hours. how much heat is generated	A. 288 x 10³J B. 288 x 10⁸J C. 288 x 10⁵J D. 288 x 10⁶J
7	Potentiometer is more sensitive than voltmeter, because	A. Voltmeter has a very high resistance B. Voltmeter has a very low resistance C. Potentiometer does not draw any current from a source of unknown potential difference D. Potentiometer is sensitive
8	Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become	A. Zero B. F/2 C. F D. 2F
9	Electric potential of earth is taken to be zero because the earth is good	A. Semiconductor B. Conductor C. Insulator D. Dielectric
10	The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be	A. 1 : 2 B. 2 : 1 C. 1 : 4 D. 4 : 1

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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 nature of capacity of electrostatic capacitor depends on

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

Free electrons are

The speed of randomly moving electrons depends upon

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

The charge carriers in gases are

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

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

The minimum charge on any object can not be less than

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

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

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Which of the following represents an electric current?

Coulomb force, when any material medium is placed between two charges

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?

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

One joule is equal to

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

One electron volt is equal to

Ohm's law states that

The resistance of a conductor does not depend on its

The capacitance of a parallel plate capacitor depends upon

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

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

A conducting wire is drawn to double its length. Final resistivity of the material will be

The SI unit of electric flux is

The SI unit of current is

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

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 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

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ECAT Physics Chapter 12 Important MCQ's

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The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

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