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 earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
2	At ordinary temperature, an increase in temperature increases the conductivity of	A. Conductor B. Semiconductor C. Insulator D. Alloy
3	Equal charges are given to two spheres of different radii. The potential will	A. Be more on the smaller sphere B. Be more on the bigger sphere C. Be equal on both the sphere D. Depend on the nature of the material of the sphere
4	Magnetic effect at a point caused due to flow a current depend upon the	A. Quantity of current B. Distance from current C. Both the quantity of current and distance from current element D. None of the all
5	Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then	A. R₁= 2R₂ B. R₂= 2R₁ C. R₂=4R₁ D. R₁= 4R₂
6	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
7	A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes	A. 2R B. 4R C. 16R D. Zero
8	Which of the following represents an electric current?	A. C^-1 B. CS^-1 C. J.S^-1 D. dynes^-1
9	The charge carriers in gases are	A. electrons B. ions C. protons D. ions and electrons
10	Heating effect caused by an electric circuit is written	A. H = I²Rt B. H = I²R C. H = IR²t D. H = IR²

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

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

The liquid which conduct current is known as

One joule is equal to

Ohm's law states that

Which one of the following has larger value of relative permitivity Erat room temperature?

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

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

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

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

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

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

The electric lines of force are

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

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

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Resistance of a conductor is increased, the currant will

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

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

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

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

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity 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

Specific resistance of a wire depends upon

In a charged capacitor the energy is stored in

The speed of randomly moving electrons depends upon

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

Resistor is a device which convert electric energy to

One electron volt is equal to

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ECAT Physics Chapter 12 Important MCQ's

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Which one of the following has larger value of relative permitivity E_rat room temperature?

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

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

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be