ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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Humera Noor 27 - Dec - 2024 19 Min 28 Sec 65/120

ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	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	A. q = Q/4 B. q = Q/2 C. q = ! D. None of these
2	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
3	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
4	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
5	Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become	A. Zero B. F/2 C. F D. 2F
6	A condenser of capacity 50μF is charged to 10 V.The energy stored is	A. 1.25 x 10^-3J B. 3.75 x 10^-3J C. 2.5 x 10^-3J D. 5 x 10^-3J
7	The electric flux from a closed surface	A. Is independent of the shape of the surface B. Depends on the charge enclosed by the surface C. Both a and b D. None of the above
8	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
9	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
10	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	A. 1.92 N B. 19.2 N C. 12 N D. 0.192 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

The speed of randomly moving electrons depends upon

The conductivity of a superconductor is

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

The resistance of the given conductor can be increased by

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

The graphical representation of ohm's law is

Free electrons are

The energy stored in a charge capacitor

Capacitance of two or more capacitors

Which of the following does not obey ohm's law?

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

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

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

106electrons are moving through a wire per second, the current developed is

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

Consider a spherical shell of metal at he centre of which a positive point charge is kept

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

The SI unit of current is

Resistance of a conductor depends upon

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

The electric field due to an infinite long thin wire at a distance R varies as

The resistance of an incandescent lamp is

The electric field will be uniform

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

The SI unit of electric flux is

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

Resistance of a conductor is increased, the currant will

If electric and gravitational force on an electron in a uniform electric field will be

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ECAT Physics Chapter 12 Important MCQ's

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The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

10⁶electrons are moving through a wire per second, the current developed is