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 ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts	A. 1310 W B. 670 W C. 810 W D. 1210 W
2	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
3	A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is	A. C B. C/2 C. Zero D. 2C
4	A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor	A. Increases B. Decreases C. Remain unchanged D. Becomes infinite
5	Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if	A. They have the same potential B. They have the same amount of charge C. They have the same capacity D. They have the same shape
6	The electric lines of force are	A. Imaginary B. Physically existing everywhere C. Physically existing near the charge D. All of the above
7	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
8	Surface density of charge is defined as	A. Charge per unit volume B. Charge per unit length C. Charge per unit area D. Charge per unit mass
9	The liquid which conduct current is known as	A. heating effect B. chemical energy C. electrolyte D. ohm's law
10	A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be	A. 64 W B. 80 W C. 100 W D. 125 W

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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

Current provided by a battery is maximum when

One electron volt is equal to

Heating effect caused by an electric circuit is written

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

One coulomb per second is equal to

The current through a metallic conductor is due to the motion of

The charge carriers in electrolyte are positive and negative

The relation V = IR represents

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

The capacitance of a parallel plate capacitor depends upon

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 we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

The liquid which conduct current is known as

The SI unit of electric flux is

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

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

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

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

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

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

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

In a voltmeter the conduction takes place due to

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

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

The graphical representation of ohm's law is

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

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

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

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

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ECAT Physics Chapter 12 Important MCQ's

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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