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	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	A. 1.92 N B. 19.2 N C. 12 N D. 0.192 N
2	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. 0.1 V B. 8 V C. 2 V D. 0.5 V
3	The charge carriers in electrolyte are positive and negative	A. protons B. electrons C. ions D. none of these
4	If the distance of separation between two chares is increased, the electrical potential energy of the system will	A. Increase B. Decrease C. May increase or decrease D. Remain the same
5	The concept of field theory was put forward by	A. Franklin B. Kepler C. Oersted D. Michael Faraday
6	The electric field intensity at a point due to a point charge	A. Falls off inversely as the distance B. Falls off inversely as the square of distance C. Remains unchanged with distance D. Increase directly as square of distance
7	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed
8	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
9	Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is	A. 11.0 ohm B. 1.0 ohm C. 7.0 ohm D. 3.0 ohm
10	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

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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 from a closed surface

Ohm's law states that

The resistance of the given conductor can be increased by

The thermistors are usually made of

The SI unit of conductivity is

Thermocouple is an arrangement of two different metals

Which of the following represents an electric current?

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

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Cause of heat production in a current carrying conductor is

Current provided by a battery is maximum when

Resistor is a device which convert electric energy to

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

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

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

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

Electric generators which convert mechanical energy into

The SI unit of electric field intensity is

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

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

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

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

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

The resistance of an incandescent lamp is

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

The charge carriers in gases are

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

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

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ECAT Physics Chapter 12 Important MCQ's

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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