ECAT Pre General Science Chapter 12 online mcq test with answers for Physics chapter 12 (Electrostatics)

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ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	Solar cell converts sunlight directly into	A. potential energy B. thermal energy C. mechanical energy D. electrical energy
2	A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?	A. 3 x 10²⁰ B. 3 x 10¹⁰ C. 6 x 10²⁰ D. 6 x 10¹⁰
3	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
4	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	A. Two B. 1/2 C. Zero D. 3/2
5	In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes	A. Four-fold B. One-half C. One-fourth D. Zero
6	The relation between charge 'Q' and current 'I' is given by	A. Q = I/t B. Q = It C. Q = I²t D. Q = I²/t
7	One coulomb of charge is created by	A. 10 electrons B. 1.6 x 10^-19electrons C. 6.25 x 10¹⁸electrons D. 6.25 x 10²¹electrons
8	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	A. 1 : 2 B. 2 : 1 C. 1 : 4 D. 4 : 1
9	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?	A. Zero B. 5μC m^-2 C. 20μC m^-2 D. 8μC m^-2
10	The electric intensity outside the two oppositely charged parallel metal plates is	A. Maximum B. Minimum C. Zero D. Infinite

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ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

ECAT Pre General Science Physics Chapter 12 Electrostatics

Current provided by a battery is maximum when

The resistivity of a substance depends upon the

The capacity of a parallel plat capacitor depends on the

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

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

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Cause of heat production in a current carrying conductor is

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

One coulomb of charge is created by

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?

In a voltmeter the conduction takes place due to

The thermistors are usually made of

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

Equal charges are given to two spheres of different radii. The potential will

One electron volt is equal to

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

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Resistor is a device which convert electric energy to

Which of the following represents an electric current?

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

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

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

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

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

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

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

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)

An electric charge at rest is

The speed of randomly moving electrons depends upon

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ECAT Physics Chapter 12 Important MCQ's

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