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 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
2	The electric field will be uniform	A. Near a positive point charge B. Near a negative point charge C. Between two oppositely charged parallel metal plates D. None of above
3	The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be	A. 1 : 2 B. 2 : 1 C. 1 : 4 D. 4 : 1
4	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
5	Electric potential of earth is taken to be zero because the earth is good	A. Semiconductor B. Conductor C. Insulator D. Dielectric
6	A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?	A. 108 g B. 10.8 g C. 0.8 g D. 108/0.8 g
7	The unit of conductance is	A. ohm B. meter C. mho D. ohm-meter
8		A. 5μF B. 10μF C. 3μF D. 6μF
9	What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?	A. 10^-1A B. 10^-2A C. 10^-4A D. 1 mA
10	A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?	A. Zero B. 5μC m^-2 C. 20μC m^-2 D. 8μC m^-2

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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

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

At ordinary temperature, an increase in temperature increases the conductivity of

The thermistors are usually made of

The speed of randomly moving electrons depends upon

The capacity of a parallel plat capacitor depends on the

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

In a voltmeter the conduction takes place due to

The charge carriers in gases are

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

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

Electron volt is the unit of.

The SI unit of capacitance is

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

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

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

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

Heating effect caused by an electric circuit is written

One joule is equal to

Resistor is a device which convert electric energy to

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

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

One coulomb per second is equal to

The electric flux from a closed surface

The energy stored in a charge capacitor

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

Surface density of charge is defined as

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

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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