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	Which one of the following has larger value of relative permitivity E_rat room temperature?	A. Vaccum B. Air C. Glass D. Water
2	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
3	The SI unit of electric field intensity is	A. CN^-1 B. NC^-1or Vm^-1 C. JC^-1 D. AV^-1
4	At ordinary temperature, an increase in temperature increases the conductivity of	A. Conductor B. Semiconductor C. Insulator D. Alloy
5	The minimum charge on any object can not be less than	A. 1.6 x 10^-19C B. 3.2 x 10^-19C C. 1.0 C D. 4.8 x 10^-19C
6	When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates	A. Decreases B. Increases C. No change D. May increase or decresase
7	A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is	A. C B. C/2 C. Zero D. 2C
8	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
9	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
10	Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?	A. 3RΩ B. 2R/4Ω C. R/3Ω D. 2R/3Ω

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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

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

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

The unit of conductance is

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

Specific resistance of a wire depends upon

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

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

Heating effect caused by an electric circuit is written

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

One coulomb of charge is created by

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

The value of electrical constant of proportionality k is

The nature of capacity of electrostatic capacitor depends on

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

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

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

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

The SI unit of electric flux is

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

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

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

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

Cause of heat production in a current carrying conductor is

The electrode connected with the positive terminal of the current source is called

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

The speed of randomly moving electrons depends upon

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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

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ECAT Physics Chapter 12 Important MCQ's

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