ECAT Pre General Science Chapter 12 online mcq test with answers for Physics chapter 12 (Electrostatics)

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ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	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
2	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
3	If electric and gravitational force on an electron in a uniform electric field will be	A. E=mg/q B. E=q/mg C. E=,g/q D. E=qg/m
4	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
5	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	A. They have the same potential B. They have the same amount of charge C. They have the same capacity D. They have the same shape
6	The speed of randomly moving electrons depends upon	A. pressure B. volume C. temperature D. mass
7	Battery is charged in motor cars, which is based on	A. Chemical effect B. Magnetic effect C. Electric effect D. None
8	The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will	A. Increase B. Decrease C. Remain F D. Become 10F/9
9	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
10	Which one of the following causes production of heat when current is set up in a wire?	A. Fall of electrons from higher orbits to lower orbits B. Inter-atomic collisions C. Inter-electron collisions D. Collisions of conduction electron with atoms

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ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

ECAT Pre General Science Physics Chapter 12 Electrostatics

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged 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

The resistance of the given conductor can be increased by

Solar cell converts sunlight directly into

The unit of conductance is

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

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

One coulomb of charge is created by

The electric lines of force are

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

The dot product of electric field intensity E and vector area A is called

The resistance of a conductor does not depend on its

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

Magnetic effect at a point caused due to flow a current depend upon the

Thermocouple is an arrangement of two different metals

The value of electrical constant of proportionality k is

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

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

The SI unit of current is

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

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

If the length of the conductor is double and its cross sectional area is halved, its conductance will

The speed of randomly moving electrons depends upon

The resistance of an incandescent lamp is

Which of the following represents an electric current?

Resistance of a conductor is increased, the currant will

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

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

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ECAT Physics Chapter 12 Important MCQ's

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Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved