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	Coulomb's force between two point charges depends upon	A. Magnitude of charges B. Distance between them C. Medium in which they are located D. All of the above
2	A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is	A. 8 J B. 16 J C. 4 x 10^-3J D. 2 x 10^-3J
3	Equal charges are given to two spheres of different radii. The potential will	A. Be more on the smaller sphere B. Be more on the bigger sphere C. Be equal on both the sphere D. Depend on the nature of the material of the sphere
4	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
5	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
6	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed
7	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
8	A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor	A. Increases B. Decreases C. Remain unchanged D. Becomes infinite
9		A. 5μF B. 10μF C. 3μF D. 6μF
10	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

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

Thermocouple is an arrangement of two different metals

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

The capacity of a parallel plat capacitor depends on the

Battery is charged in motor cars, which is based on

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

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

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

The relation between charge 'Q' and current 'I' is given by

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

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

The nature of capacity of electrostatic capacitor depends on

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

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

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?

Potentiometer is more sensitive than voltmeter, because

The unit of intensity of electric field is

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

In a voltmeter the conduction takes place due to

The resistance of a conductor does not depend on its

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

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

One electron volt is equal to

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

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

The SI unit of conductivity is

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

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ECAT Physics Chapter 12 Important MCQ's

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The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

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

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