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 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
2	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
3	The SI unit of capacitance is	A. Farad B. Henry C. Ohm D. Volt
4	A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is	A. Charge Q B. Potential V C. Capacity D. Energy U
5	If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?	A. 60 W bulb B. 100 W bulb C. Both equally D. None of these
6	The current through a metallic conductor is due to the motion of	A. protons B. neutrons C. electrons D. free electrons
7	Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then	A. R₁= 2R₂ B. R₂= 2R₁ C. R₂=4R₁ D. R₁= 4R₂
8	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
9	The fractional change in resistance per kelvin is known as	A. temperature coefficient B. resistance coefficient C. super temperature D. critical temperature
10	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed

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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 charge carriers in gases are

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Battery is charged in motor cars, which is based on

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

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

At any point on the right bisector of the line joining two equal and opposite charges

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 point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

The relation V = IR represents

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

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

In a voltmeter the conduction takes place due to

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

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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 conductivity of a superconductor is

The electric field will be uniform

Which of the following represents an electric current?

Resistance of a conductor depends upon

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

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

The potential difference across each resistance in series combination is

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

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

Electron volt is the unit of.

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

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

Free electrons are

Ohm established a relation between

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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