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	Electric potential of earth is taken to be zero because the earth is good	A. Semiconductor B. Conductor C. Insulator D. Dielectric
2	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
3	The substances whose resistance decreases with the increase in temperature these substances have coefficient of	A. positive temperature B. negative temperature C. absolute temperature D. zero temperature
4	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
5	The unit of resistivity is	A. ohm B. ohm-m² C. ohm-meter D. ohm-m^-1
6	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
7	The concept of field theory was put forward by	A. Franklin B. Kepler C. Oersted D. Michael Faraday
8	Physicist George Simon ohm was a	A. German physical B. French physicist C. Chinese physicist D. Russian physicist
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	The charge per unit time through any cross-section of a conductor is called	A. capacitance B. electric power C. current D. potential difference

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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

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

The electric flux from a closed surface

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

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?

The capacity of a parallel plat capacitor depends on the

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

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

The SI unit of permitivity is

Specific resistance of a wire depends upon

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

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

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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

In a voltmeter the conduction takes place due to

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

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

The ohm's is defined as

The resistance of the given conductor can be increased by

The fractional change in resistance per kelvin is known as

The conductivity of a superconductor is

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

If we increase the distance between two plates of the capacitor, the capacitance will

In a charged capacitor the energy is stored in

The resistance of an incandescent lamp is

The relation V = IR represents

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

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

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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

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