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	A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be	A. 64 W B. 80 W C. 100 W D. 125 W
2	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
3	The conductivity of a superconductor is	A. Infinite B. Very large C. Very small D. Zero
4	The unit of resistivity is	A. ohm B. ohm-m² C. ohm-meter D. ohm-m^-1
5	Electron volt is the unit of.	A. Potential difference B. Energy C. Resistance D. Capacitance
6	A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts	A. 1310 W B. 670 W C. 810 W D. 1210 W
7	When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be	A. 180 watt B. 10 watt C. 20 watt D. 60 watt
8	A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?	A. 200 W B. 302.5 C. 250 W D. 350 W
9	If the two charges in Coulomb's law have double distance between them, then electric force	A. Becomes two-fold B. Becomes four-fold C. Remains the same D. None of these
10	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	A. -10 N B. +10 N C. +20 N D. -20 N

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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

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

Thermocouple is an arrangement of two different metals

Surface density of charge is defined as

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

At any point on the right bisector of the line joining two equal and opposite charges

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

The SI unit of electric field intensity is

Free electrons are

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 graphical representation of ohm's law is

In bringing an electron towards another electron, electrostatic potential energy of system

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

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

The fractional change in resistance per kelvin is known as

The SI unit of conductivity is

One joule is equal to

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 earth's potential is taken as

Resistance of a conductor depends upon

In a charged capacitor the energy is stored in

The charge carriers in electrolyte are positive and negative

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

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

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

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

If the two charges in Coulomb's law have double distance between them, then electric force

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

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

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

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ECAT Physics Chapter 12 Important MCQ's

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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