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 unit of intensity of electric field is	A. newton/coluomb B. jule/coluomb C. volt x metre D. newton/metre
2	The speed of randomly moving electrons depends upon	A. pressure B. volume C. temperature D. mass
3	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
4	A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts	A. 1310 W B. 670 W C. 810 W D. 1210 W
5	A conducting wire is drawn to double its length. Final resistivity of the material will be	A. Double of the original one B. Half of the original one C. One fourth of the original one D. Same as original one
6	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. 0.1 watt B. 1 watt C. 10 watt D. 100 watt
7	The resistance of a conductor does not depend on its	A. mass B. resistivity C. length D. cross-sectional area
8	A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?	A. 3 x 10²⁰ B. 3 x 10¹⁰ C. 6 x 10²⁰ D. 6 x 10¹⁰
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	Which of the following does not obey ohm's law?	A. Copper B. Al C. Diode D. None

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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 electric flux is linked with a surface will be maximum when

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

Free electrons are

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

Ohm is the unit of

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

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

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

The value of electrical constant of proportionality k is

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 SI unit of capacitance is

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

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

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

The unit of resistivity is

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

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

The current through a metallic conductor is due to the motion of

The SI unit of electric flux is

The unit of resistance is

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

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

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

The concept of field theory was put forward by

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

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

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

The capacitance of a parallel plate capacitor depends upon

The SI unit of electric field intensity is

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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

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is

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