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	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	A. 1840 KeV B. 1/1840 KeV C. 1 KeV D. 920 KeV
3	The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is	A. 10Ω B. 20Ω C. 30Ω D. 40Ω
4	A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is	A. Zero B. 0.5Ω C. 1.1Ω D. 5.0Ω
5	What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?	A. 10^-1A B. 10^-2A C. 10^-4A D. 1 mA
6	A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is	A. Charge Q B. Potential V C. Capacity D. Energy U
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	Cause of heat production in a current carrying conductor is	A. Collisions of free electrons with one another B. High drift speed of free electrons C. Collisions of free electrons with atoms or ions of conductor D. High resistance value
9	The potential difference across each resistance in series combination is	A. same B. different C. zero D. none of these
10	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

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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

Surface density of charge is defined as

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

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

Which of the following does not obey ohm's law?

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

Free electrons are

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

The electrode connected with the positive terminal of the current source is called

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Resistance of a conductor is increased, the currant will

The electric intensity at infinite distance from the point charge will be

The graphical representation of ohm's law is

Battery is charged in motor cars, which is based on

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

The SI unit of current is

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

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

Resistor is a device which convert electric energy to

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

The energy stored in a charge capacitor

The liquid which conduct current is known as

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

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

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

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

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

The unit of conductance is

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

The SI unit of conductivity is

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

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ECAT Physics Chapter 12 Important MCQ's

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

An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is