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	A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to	A. -q B. +q C. -2q D. +4q
2	Physicist George Simon ohm was a	A. German physical B. French physicist C. Chinese physicist D. Russian physicist
3	The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is	A. 25 B. 225 C. 625 D. 1250
4	In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called	A. Time constant B. Decay constant C. None of these D. All of above
5	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	A. 1840 KeV B. 1/1840 KeV C. 1 KeV D. 920 KeV
6	The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is	A. 9 x 10⁵V B. 9 V C. 8 x 10⁶V D. 80 V
7	Solar cell converts sunlight directly into	A. potential energy B. thermal energy C. mechanical energy D. electrical energy
8	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
9	The resistivity of a substance depends upon the	A. length B. mass C. area D. temperature
10	The electric flux is linked with a surface will be maximum when	A. The surface is held parallel to the electric field B. The surface is held perpendicular to the electric field C. The surface makes an angle of 45° with the electric field D. All of the above

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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 is increased, the currant will

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

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

The SI unit of electric field intensity is

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

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

The electric field intensity at a point due to a point charge

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

The capacitance of a parallel plate capacitor depends upon

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

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

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

Ohm established a relation between

The potential difference across each resistance in series combination is

The nature of capacity of electrostatic capacitor depends on

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

The unit of resistivity is

Resistance of a conductor depends upon

Coulomb's force between two point charges depends upon

In a voltmeter the conduction takes place due to

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

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

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

In bringing an electron towards another electron, electrostatic potential energy of system

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

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

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

An electric charge at rest is

Physicist George Simon ohm was a

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ECAT Physics Chapter 12 Important MCQ's

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

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