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	A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?	A. Electric potential at the surface of the cube is zero B. Electric potential within the cube is zero C. Electric filed is normal to the surface of the cube D. Electric filed varies within the cube
2	The charge carriers in electrolyte are positive and negative	A. protons B. electrons C. ions D. none of these
3	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	A. 0.1 watt B. 1 watt C. 10 watt D. 100 watt
4	At any point on the right bisector of the line joining two equal and opposite charges	A. At electric field is zero B. The electric potential is zero C. The electric potential decreases with increasing distance from the centre D. The electric field is perpendicular to the line joining the charges
5	Resistance of a conductor depends upon	A. the quantity of current passing through it B. the voltage applied between its end C. its dimensions, physical state and nature of its material D. all of the above
6	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
7	An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be	A. 1 MeV B. 2 MeV C. 4 MeV D. 8 MeV
8	Electric generators which convert mechanical energy into	A. solar energy B. thermal energy C. kinetic energy D. electrical energy
9	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)	A. Q/4πr² B. 2Q/4πr² C. Q.d D. Zero
10	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

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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 ohm's is defined as

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

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

The value of electrical constant of proportionality k is

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

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

The SI unit of conductivity is

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

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Solar cell converts sunlight directly into

The resistance of an incandescent lamp is

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

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

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

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

Magnetic effect at a point caused due to flow a current depend upon the

The unit of resistance is

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

The graphical representation of ohm's law is

Which one of the following is the unit of electric field intensity

The fractional change in resistance per kelvin is known as

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

Capacitance of two or more capacitors

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

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

106electrons are moving through a wire per second, the current developed is

Electron volt is the unit of.

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ECAT Physics Chapter 12 Important MCQ's

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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

10⁶electrons are moving through a wire per second, the current developed is