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	A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts	A. 1310 W B. 670 W C. 810 W D. 1210 W
3	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
4	Coulomb's force between two point charges depends upon	A. Magnitude of charges B. Distance between them C. Medium in which they are located D. All of the above
5	The liquid which conduct current is known as	A. heating effect B. chemical energy C. electrolyte D. ohm's law
6	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
7	The capacity of a parallel plat capacitor depends on the	A. Type to metal used B. Thickness of plates C. Potential applied across the plates D. Separation between the plates
8	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
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	The relation V = IR represents	A. Ampere law B. Faraday's law C. Ohm's law D. Len's law

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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

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

The charge per unit time through any cross-section of a conductor is called

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

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

The liquid which conduct current is known as

The fractional change in resistance per kelvin is known as

The relation V = IR represents

The earth's potential is taken as

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Resistance of a conductor is increased, the currant will

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

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

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

In a charged capacitor the energy is stored in

If electric and gravitational force on an electron in a uniform electric field will be

The SI unit of current is

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

The SI unit of electric flux is

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

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

The nature of capacity of electrostatic capacitor depends on

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

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

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

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)

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

Electric generators which convert mechanical energy into

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?

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

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

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

A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?