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 resistance of an incandescent lamp is	A. Smaller when switched on B. Greater when switched off C. The same whether it is switch off or switch on D. Greater when switched on
2	A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be	A. Zero B. 10Ω C. 1Ω D. 0.10Ω
3	A closed surface contains two equal and opposite charges. The net electric flux from the surface will be	A. Negative B. Positive C. Infinite D. Zero
4	The relation V = IR represents	A. Ampere law B. Faraday's law C. Ohm's law D. Len's law
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	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	A. 3.9 B. 4 C. 4.2 D. 6
7	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
8	Ohm's law states that	A. The current through a resistor is directly proportional to the applied voltage B. The voltage across a resistor is directly proportional to the current passing through it C. Resistance is the constant of proportionality between the voltage and current D. all of these
9	The resistance of the given conductor can be increased by	A. Increasing the area B. Changing resistivity C. Decreasing the length D. None of the above because change does not matter because in any case the volume remains the same
10	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed

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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

Resistance of a conductor depends upon

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

Current provided by a battery is maximum when

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

At ordinary temperature, an increase in temperature increases the conductivity of

The earth's potential is taken as

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

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

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

Ohm is the unit of

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

The resistance of the given conductor can be increased by

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

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

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

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

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

The electric lines of force are

The electric intensity outside the two oppositely charged parallel metal plates is

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

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

One electron volt is equal to

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

Electron volt is the unit of.

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

Which of the following represents an electric current?

The current through a metallic conductor is due to the motion of

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

The electric flux is linked with a surface will be maximum when

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