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	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	A. 1/3 V B. 2/3 V C. 3/2 V D. 3V
2	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	A. 120 C B. 240 C C. 20 C D. 4 C
3	A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?	A. 200 W B. 302.5 C. 250 W D. 350 W
4	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
5	A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is	A. Zero B. 0.5Ω C. 1.1Ω D. 5.0Ω
6	A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor	A. Increases B. Decreases C. Remain unchanged D. Becomes infinite
7	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
8	An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be	A. V/e B. eV C. e/V D. V
9	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
10	A closed surface contains two equal and opposite charges. The net electric flux from the surface will be	A. Negative B. Positive C. Infinite D. Zero

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

One joule is equal to

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

Electron volt is the unit of.

The graphical representation of ohm's law is

Physicist George Simon ohm was a

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

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

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

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)

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

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

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

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

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

Capacitance of two or more capacitors

The resistivity of a substance depends upon the

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

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

The electric intensity at infinite distance from the point charge will be

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

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

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

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Which of the following does not obey ohm's law?

The unit of resistivity is

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ECAT Physics Chapter 12 Important MCQ's

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

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