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	Electric potential of earth is taken to be zero because the earth is good	A. Semiconductor B. Conductor C. Insulator D. Dielectric
2	The liquid which conduct current is known as	A. heating effect B. chemical energy C. electrolyte D. ohm's law
3	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
4	A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be	A. 64 W B. 80 W C. 100 W D. 125 W
5	Which one of the following has larger value of relative permitivity E_rat room temperature?	A. Vaccum B. Air C. Glass D. Water
6	The electric intensity outside the two oppositely charged parallel metal plates is	A. Maximum B. Minimum C. Zero D. Infinite
7	The unit of intensity of electric field is	A. newton/coluomb B. jule/coluomb C. volt x metre D. newton/metre
8	If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is	A. one ohm B. one joule C. one volt D. one ampere
9	10⁶electrons are moving through a wire per second, the current developed is	A. 1.6 x 10^-19 B. 1 A C. 1.6 x 10^-15A D. 10⁶A
10	The SI unit of electric field intensity is	A. CN^-1 B. NC^-1or Vm^-1 C. JC^-1 D. AV^-1

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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 60 W bulb operates on 220 V supply. The current flowing through the bulb is

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

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

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

The unit of intensity of electric field is

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

Cause of heat production in a current carrying conductor is

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

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

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

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

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)

In bringing an electron towards another electron, electrostatic potential energy of system

The resistance of the given conductor can be increased by

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

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

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

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

One electron volt is equal to

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

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

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

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

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

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?

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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

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

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved