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 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
2	If we increase the distance between two plates of the capacitor, the capacitance will	A. Increase B. Decrease C. Remain same D. First increase then decrease
3	Which one of the following causes production of heat when current is set up in a wire?	A. Fall of electrons from higher orbits to lower orbits B. Inter-atomic collisions C. Inter-electron collisions D. Collisions of conduction electron with atoms
4	The SI unit of electric flux is	A. Weber B. Nm²C^-1 C. NmC^-1 D. Nm^-2C
5	Heating effect caused by an electric circuit is written	A. H = I²Rt B. H = I²R C. H = IR²t D. H = IR²
6	If electric and gravitational force on an electron in a uniform electric field will be	A. E=mg/q B. E=q/mg C. E=,g/q D. E=qg/m
7	Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is	A. 11.0 ohm B. 1.0 ohm C. 7.0 ohm D. 3.0 ohm
8	Some charge is being given to a conductor. Then its potential	A. Is maximum at surface B. Is maximum at centre C. Is remain same throughout the conductor D. Is maximum somewhere between surface and centre
9	The conductivity of a superconductor is	A. Infinite B. Very large C. Very small D. Zero
10	The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is	A. 10 KJ B. 5 KJ C. 2 KJ D. 1 KJ

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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 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

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?

One coulomb per second is equal to

Coulomb's force between two point charges depends upon

Specific resistance of a wire depends upon

One coulomb of charge is created by

106electrons are moving through a wire per second, the current developed is

The fractional change in resistance per kelvin is known as

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

The resistance of an incandescent lamp is

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)

In a voltmeter the conduction takes place due to

The electric lines of force are

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

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

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

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

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

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

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

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

If the two charges in Coulomb's law have double distance between them, then electric force

The relation between charge 'Q' and current 'I' is given by

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

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

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

Surface density of charge is defined as

The SI unit of electric flux is

Ohm is the unit of

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ECAT Physics Chapter 12 Important MCQ's

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10⁶electrons are moving through a wire per second, the current developed is

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