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 capacitor of capacity 1μF is charged to 1 KV. The energy stored in J	A. 5 B. 0.5 C. 0.005 D. 50
2	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
3	At ordinary temperature, an increase in temperature increases the conductivity of	A. Conductor B. Semiconductor C. Insulator D. Alloy
4	The value of electrical constant of proportionality k is	A. 9 x 10⁹Nm²C^-2 B. 9 x 10^-9Nm²C^-2 C. 9 x 10¹⁰Nm²C² D. 9.85 x 10^-12N^-1C^-2
5	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. Coulomb's law B. Gauss's law C. Biot-Sarwat law D. Ampere's law
6	The current through a metallic conductor is due to the motion of	A. protons B. neutrons C. electrons D. free electrons
7	Surface density of charge is defined as	A. Charge per unit volume B. Charge per unit length C. Charge per unit area D. Charge per unit mass
8	If the length of the conductor is double and its cross sectional area is halved, its conductance will	A. Increase four fold B. Become one-fourth C. Become one-half D. Remains unchanged
9	The speed of randomly moving electrons depends upon	A. pressure B. volume C. temperature D. mass
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

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

One electron volt is equal to

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

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

The fractional change in resistance per kelvin is known as

The concept of field theory was put forward by

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

If the distance of separation between two chares is increased, the electrical potential energy of the system will

The resistivity of a substance depends upon the

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 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

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

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

The value of electrical constant of proportionality k is

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

Some charge is being given to a conductor. Then its potential

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

Ohm established a relation between

Electron volt is the unit of.

Physicist George Simon ohm was a

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

The unit of conductance is

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

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

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

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

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

Ohm is the unit of

The resistance of the given conductor can be increased by

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ECAT Physics Chapter 12 Important MCQ's

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

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

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

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