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	Specific resistance of a wire depends upon	A. Length B. Cross-section area C. Mass D. None
2	In a voltmeter the conduction takes place due to	A. Electrons only B. Holes only C. Electrons and holes D. Electrons and ions
3	Electron volt is the unit of	A. Potential difference B. Energy C. Resistance D. Capacitance
4	Ohm is the unit of	A. current B. capacitance C. energy D. resistance
5	The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is	A. 9 x 10⁵V B. 9 V C. 8 x 10⁶V D. 80 V
6	Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved	A. 1.92 N B. 19.2 N C. 12 N D. 0.192 N
7	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. 2 R B. R C. R/2 D. R/4
8	If the distance of separation between two chares is increased, the electrical potential energy of the system will	A. Increase B. Decrease C. May increase or decrease D. Remain the same
9	The SI unit of electric field intensity is	A. CN^-1 B. NC^-1or Vm^-1 C. JC^-1 D. AV^-1
10	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. q = Q/4 B. q = Q/2 C. q = ! D. None of these

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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 potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Which of the following represents an electric current?

If the distance of separation between two chares is increased, the electrical potential energy of the system will

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

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

The conductivity of a superconductor is

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Resistor is a device which convert electric energy to

One joule is equal to

Resistance of a conductor is increased, the currant will

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Which of the following does not obey ohm's law?

The earth's potential is taken as

The charge carriers in gases are

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

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

Electric generators which convert mechanical energy into

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

Resistance of a conductor depends upon

Battery is charged in motor cars, which is based on

One coulomb of charge is created by

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

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

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

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

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

Ohm's law states that

Current provided by a battery is maximum when

The electric field will be uniform

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ECAT Physics Chapter 12 Important MCQ's

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An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be