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 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
2	The unit of intensity of electric field is	A. newton/coluomb B. jule/coluomb C. volt x metre D. newton/metre
3	The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is	A. Q=V/C B. Q=C/V C. Q=1/2CV D. Q=CV
4	Ohm established a relation between	A. voltage and resistance B. voltage and charge C. voltage and current D. voltage resistance and charge
5	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
6	The nature of capacity of electrostatic capacitor depends on	A. Shape B. Size C. Thickness of plates D. Area
7	Some charge is being given to a conductor. Then its potential	A. Is maximum at surface B. Is maximum at centre C. Is remain same throughout the conductor D. Is maximum somewhere between surface and centre
8	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	A. 0.4 A B. 11.4 A C. 9.8 A D. 10.6 A
9	If the two charges in Coulomb's law have double distance between them, then electric force	A. Becomes two-fold B. Becomes four-fold C. Remains the same D. None of these
10	Current provided by a battery is maximum when	A. Internal resistance equal to external resistance B. Internal resistance is greater than external resistance C. Internal resistance is less then external resistance 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

Coulomb's force between two point charges depends upon

Resistance of a conductor is increased, the currant will

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

The electric intensity at infinite distance from the point charge 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

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

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

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

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

The electric flux is linked with a surface will be maximum when

If a 40 watt light bulb burns for 2 hours. how much heat is generated

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

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

The SI unit of capacitance is

The electric field will be uniform

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

A condenser of capacity 50μF is charged to 10 V.The energy stored is

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

Electric potential of earth is taken to be zero because the earth is good

Thermocouple is an arrangement of two different metals

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

Surface density of charge is defined as

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

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

In a voltmeter the conduction takes place due to

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 car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Battery is charged in motor cars, which is based on

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Magnetic effect at a point caused due to flow a current depend upon the

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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

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

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be