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	An electric charge at rest is	A. Only an electric field B. Only a magnetic field C. Both electric and magnetic fields D. None of the above
2	The electric flux is linked with a surface will be maximum when	A. The surface is held parallel to the electric field B. The surface is held perpendicular to the electric field C. The surface makes an angle of 45° with the electric field D. All of the above
3	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	A. power B. current C. resistance D. temperature
4	The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is	A. 25 B. 225 C. 625 D. 1250
5	Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be	A. 0.52 A B. 1 mA C. 0.7 mA D. 1.4 A
6	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed
7	A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance	A. Increase k time B. Decreases k times C. Decreases 1/K times D. Remains unchanged
8	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	A. 1.92 N B. 19.2 N C. 12 N D. 0.192 N
9	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. negative charges B. positive charges C. protons D. electrons
10	The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is	A. Q=V/C B. Q=C/V C. Q=1/2CV D. Q=CV

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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 charge carriers in gases are

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

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

The speed of randomly moving electrons depends upon

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

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)

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

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

An electric charge at rest is

The electric intensity outside the two oppositely charged parallel metal plates is

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

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

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

The SI unit of conductivity is

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

Battery is charged in motor cars, which is based on

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

The resistance of the given conductor can be increased by

The SI unit of electric flux 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

The minimum charge on any object can not be less than

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

Resistor is a device which convert electric energy to

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Electric potential of earth is taken to be zero because the earth is good

One joule is equal to

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

The electric field due to an infinite long thin wire at a distance R varies as

The resistance of a conductor does not depend on its

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

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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?

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

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

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