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	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
2	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
3	The relation between charge 'Q' and current 'I' is given by	A. Q = I/t B. Q = It C. Q = I²t D. Q = I²/t
4	If a 40 watt light bulb burns for 2 hours. how much heat is generated	A. 288 x 10³J B. 288 x 10⁸J C. 288 x 10⁵J D. 288 x 10⁶J
5	Some charge is being given to a conductor. Then its potential	A. Is maximum at surface B. Is maximum at centre C. Is remain same throughout the conductor D. Is maximum somewhere between surface and centre
6	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	A. Coulomb's law B. Gauss's law C. Biot-Sarwat law D. Ampere's law
7	The value of electrical constant of proportionality k is	A. 9 x 10⁹Nm²C^-2 B. 9 x 10^-9Nm²C^-2 C. 9 x 10¹⁰Nm²C² D. 9.85 x 10^-12N^-1C^-2
8	When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates	A. Decreases B. Increases C. No change D. May increase or decresase
9	Current provided by a battery is maximum when	A. Internal resistance equal to external resistance B. Internal resistance is greater than external resistance C. Internal resistance is less then external resistance D. None of these
10	If the two charges in Coulomb's law have double distance between them, then electric force	A. Becomes two-fold B. Becomes four-fold C. Remains the same D. None of these

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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 relation V = IR represents

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

The resistance of an incandescent lamp is

The concept of field theory was put forward by

Ohm's law states that

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

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Surface density of charge is defined as

The electric lines of force are

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

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

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

Electron volt is the unit of

The fractional change in resistance per kelvin is known as

A conducting wire is drawn to double its length. Final resistivity of the material will be

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

Which one of the following is the unit of electric field intensity

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

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

In a voltmeter the conduction takes place due to

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

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

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

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

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

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

Electron volt is the unit of.

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

The electric field will be uniform

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ECAT Physics Chapter 12 Important MCQ's

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In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is

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