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 substances whose resistance decreases with the increase in temperature these substances have coefficient of	A. positive temperature B. negative temperature C. absolute temperature D. zero temperature
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	Electric potential of earth is taken to be zero because the earth is good	A. Semiconductor B. Conductor C. Insulator D. Dielectric
4	At ordinary temperature, an increase in temperature increases the conductivity of	A. Conductor B. Semiconductor C. Insulator D. Alloy
5	Consider a spherical shell of metal at he centre of which a positive point charge is kept	A. The electric filed is zero outside the shell B. The electric field is zero everywhere C. The electric field is zero in the region inside the shell D. The electric field is non-zero in both regions outside and inside the shell
6	The unit of resistance is	A. volt B. ampere C. ohm D. coat
7	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	A. 3.9 B. 4 C. 4.2 D. 6
8	A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is	A. Charge Q B. Potential V C. Capacity D. Energy U
9	What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?	A. 10^-1A B. 10^-2A C. 10^-4A D. 1 mA
10	A condenser of capacity 50μF is charged to 10 V.The energy stored is	A. 1.25 x 10^-3J B. 3.75 x 10^-3J C. 2.5 x 10^-3J D. 5 x 10^-3J

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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 concept of field theory was put forward by

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

In a voltmeter the conduction takes place due to

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

The resistance of a conductor does not depend on its

Coulomb force, when any material medium is placed between two charges

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

The potential difference across each resistance in series combination is

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

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

Resistance of a conductor is increased, the currant will

Electron volt is the unit of.

If we increase the distance between two plates of the capacitor, the capacitance will

The nature of capacity of electrostatic capacitor depends on

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

The resistance of the given conductor can be increased by

The charge carriers in electrolyte are positive and negative

Cause of heat production in a current carrying conductor is

The ohm's is defined as

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

The resistance of an incandescent lamp is

The SI unit of electric flux is

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

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

The fractional change in resistance per kelvin is known as

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

One electron volt is equal to

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

The SI unit of capacitance is

The capacitance of a parallel plate capacitor depends upon

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ECAT Physics Chapter 12 Important MCQ's

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The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is