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	If the distance of separation between two chares is increased, the electrical potential energy of the system will	A. Increase B. Decrease C. May increase or decrease D. Remain the same
2	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	A. 2 R B. R/4 C. R/2 D. R
3	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
4	The potential difference across each resistance in series combination is	A. same B. different C. zero D. none of these
5	The thermistors are usually made of	A. Metals with low temperature coefficient of resistivity B. Metals with high temperature coefficient of resistivity C. Metal oxides with high temperature coefficient of resistivity D. Semi conducting materials having low temperature coefficient of resistivity
6	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
7	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	A. 2 R B. R C. R/2 D. R/4
8	The fractional change in resistance per kelvin is known as	A. temperature coefficient B. resistance coefficient C. super temperature D. critical temperature
9	Which of the following represents an electric current?	A. C^-1 B. CS^-1 C. J.S^-1 D. dynes^-1
10	A 60 W bulb operates on 220 V supply. The current flowing through the bulb is	A. 11/3 A B. 3 A C. 3/11 A D. 6

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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

Electron volt is the unit of.

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

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

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

The charge per unit time through any cross-section of a conductor is called

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

The SI unit of current is

Which one of the following has larger value of relative permitivity Erat room temperature?

The relation V = IR represents

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

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

The nature of capacity of electrostatic capacitor depends on

The SI unit of capacitance is

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

The value of electrical constant of proportionality k is

In a charged capacitor the energy is stored in

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

Heating effect caused by an electric circuit is written

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

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

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

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

Ohm's law states that

Battery is charged in motor cars, which is based on

The charge carriers in gases are

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

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

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

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

The graphical representation of ohm's law is

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ECAT Physics Chapter 12 Important MCQ's

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Which one of the following has larger value of relative permitivity E_rat room temperature?

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then