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	One coulomb of charge is created by	A. 10 electrons B. 1.6 x 10^-19electrons C. 6.25 x 10¹⁸electrons D. 6.25 x 10²¹electrons
2	Coulomb force, when any material medium is placed between two charges	A. Increases B. Decreases C. Remain unchanged D. None of these
3	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
4	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
5	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)	A. Q/4πr² B. 2Q/4πr² C. Q.d D. Zero
6	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
7	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
8	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
9	Ohm's law states that	A. The current through a resistor is directly proportional to the applied voltage B. The voltage across a resistor is directly proportional to the current passing through it C. Resistance is the constant of proportionality between the voltage and current D. all of these
10	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

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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 ohm's is defined as

The fractional change in resistance per kelvin is known as

Electron volt is the unit of

The minimum charge on any object can not be less than

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

The SI unit of current is

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

The relation V = IR represents

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

The electric intensity outside the two oppositely charged parallel metal plates is

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?

The resistance of the given conductor can be increased by

Resistance of a conductor depends upon

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

The relation between charge 'Q' and current 'I' is given by

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

The earth's potential is taken as

Some charge is being given to a conductor. Then its potential

Battery is charged in motor cars, which is based on

Current provided by a battery is maximum when

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

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

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 resistance of an incandescent lamp is

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

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Electron volt is the unit of.

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

One coulomb of charge is created by

106electrons are moving through a wire per second, the current developed is

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ECAT Physics Chapter 12 Important MCQ's

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The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

10⁶electrons are moving through a wire per second, the current developed is