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	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
2	When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to	A. One joule B. One erg C. One electron volt D. None of these
3	The unit of resistivity is	A. ohm B. ohm-m² C. ohm-meter D. ohm-m^-1
4	If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy	A. Ve B. V/e C. e/V D. 2Ve
5		A. 5μF B. 10μF C. 3μF D. 6μF
6	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
7	Potentiometer is more sensitive than voltmeter, because	A. Voltmeter has a very high resistance B. Voltmeter has a very low resistance C. Potentiometer does not draw any current from a source of unknown potential difference D. Potentiometer is sensitive
8	The electric intensity at infinite distance from the point charge will be	A. Infinite B. Positive C. Zero D. Negative
9	The minimum charge on any object can not be less than	A. 1.6 x 10^-19C B. 3.2 x 10^-19C C. 1.0 C D. 4.8 x 10^-19C
10	Which one of the following has larger value of relative permitivity E_rat room temperature?	A. Vaccum B. Air C. Glass D. Water

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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

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

Electric generators which convert mechanical energy into

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

The speed of randomly moving electrons depends upon

The unit of resistance is

Capacitance of two or more capacitors

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

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

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

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

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

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

The electrode connected with the positive terminal of the current source is called

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

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

One coulomb of charge is created by

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

Heating effect caused by an electric circuit is written

Ohm's law states that

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

Physicist George Simon ohm was a

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

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

If the distance of separation between two chares is increased, the electrical potential energy of the system will

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

Specific resistance of a wire depends upon

The resistance of an incandescent lamp is

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ECAT Physics Chapter 12 Important MCQ's

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A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?

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

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be