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 electric intensity at infinite distance from the point charge will be	A. Infinite B. Positive C. Zero D. Negative
2	Ohm is the unit of	A. current B. capacitance C. energy D. resistance
3	The minimum charge on any object can not be less than	A. 1.6 x 10^-19C B. 3.2 x 10^-19C C. 1.0 C D. 4.8 x 10^-19C
4	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
5	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. Two B. 1/2 C. Zero D. 3/2
6	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	A. Zero B. F/2 C. F D. 2F
7	Potentiometer is more sensitive than voltmeter, because	A. Voltmeter has a very high resistance B. Voltmeter has a very low resistance C. Potentiometer does not draw any current from a source of unknown potential difference D. Potentiometer is sensitive
8	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
9	The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is	A. 10Ω B. 20Ω C. 30Ω D. 40Ω
10	A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then	A. The charge in the plates reduces and potential difference increase B. Potential difference between the plates increase, stored energy decreases and charge remains the same C. Potential difference between the plates decreases and charge remains unchanged D. None of the above

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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 fractional change in resistance per kelvin is known as

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

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

Capacitance of two or more capacitors

The electric field intensity at a point due to a point charge

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

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)

The SI unit of capacitance is

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

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

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

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

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

Which one of the following has larger value of relative permitivity Erat room temperature?

The resistance of an incandescent lamp 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 speed of randomly moving electrons depends upon

Consider a spherical shell of metal at he centre of which a positive point charge is kept

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

The electric field due to an infinite long thin wire at a distance R varies as

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

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

Resistance of a conductor is increased, the currant will

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

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

The minimum charge on any object can not be less than

Electric generators which convert mechanical energy into

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

Surface density of charge is defined as

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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Which one of the following has larger value of relative permitivity E_rat room temperature?

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