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	Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be	A. 711μF B. 611μF C. 811μF D. 511μF
2	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
3	Cause of heat production in a current carrying conductor is	A. Collisions of free electrons with one another B. High drift speed of free electrons C. Collisions of free electrons with atoms or ions of conductor D. High resistance value
4	Heating effect caused by an electric circuit is written	A. H = I²Rt B. H = I²R C. H = IR²t D. H = IR²
5	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
6	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
7	Resistance of a conductor depends upon	A. the quantity of current passing through it B. the voltage applied between its end C. its dimensions, physical state and nature of its material D. all of the above
8	A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)	A. 2 B. 1 C. 0.5 D. 1.5
9	Which one of the following is the unit of electric field intensity	A. JC^-1 B. Vm^-1 C. Cm^-1 D. CJ^-1
10	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	A. 3/5 ohm B. 2 ohm C. 6/5 ohm D. 3 ohm

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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

Battery is charged in motor cars, which is based on

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

Ohm established a relation between

The SI unit of electric flux is

Resistance of a conductor is increased, the currant will

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

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

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

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

One electron volt is equal to

The minimum charge on any object can not be less than

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

The SI unit of electric field intensity is

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Free electrons are

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 concept of field theory was put forward by

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

The energy stored in a charge capacitor

Coulomb's force between two point charges depends upon

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

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

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

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

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

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

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 current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

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ECAT Physics Chapter 12 Important MCQ's

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Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity 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

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

A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?