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	Resistance of a conductor depends upon	A. the quantity of current passing through it B. the voltage applied between its end C. its dimensions, physical state and nature of its material D. all of the above
2	The substances whose resistance decreases with the increase in temperature these substances have coefficient of	A. positive temperature B. negative temperature C. absolute temperature D. zero temperature
3	The relation V = IR represents	A. Ampere law B. Faraday's law C. Ohm's law D. Len's law
4	The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is	A. 4/5Ω B. 5/4Ω C. 20Ω D. 0.05 Ω
5	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	A. Two B. 1/2 C. Zero D. 3/2
6	The capacity of a parallel plat capacitor depends on the	A. Type to metal used B. Thickness of plates C. Potential applied across the plates D. Separation between the plates
7	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
8	The current through a metallic conductor is due to the motion of	A. protons B. neutrons C. electrons D. free electrons
9	The electric field will be uniform	A. Near a positive point charge B. Near a negative point charge C. Between two oppositely charged parallel metal plates D. None of above
10	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite

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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

The electric flux from a closed surface

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

Current provided by a battery is maximum when

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)

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

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

Resistance of a conductor is increased, the currant will

The charge carriers in gases are

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

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

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 SI unit of electric flux is

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

The potential difference across each resistance in series combination is

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

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

Some charge is being given to a conductor. Then its potential

Which of the following represents an electric current?

The electric lines of force are

The thermistors are usually made of

Ohm is the unit of

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

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

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

Surface density of charge is defined as

Solar cell converts sunlight directly into

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?

The concept of field theory was put forward by

The SI unit of electric field intensity is

Equal charges are given to two spheres of different radii. The potential will

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