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	Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then	A. R₁= 2R₂ B. R₂= 2R₁ C. R₂=4R₁ D. R₁= 4R₂
2	A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes	A. 2R B. 4R C. 16R D. Zero
3	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
4	A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?	A. 108 g B. 10.8 g C. 0.8 g D. 108/0.8 g
5	The SI unit of electric flux is	A. Weber B. Nm²C^-1 C. NmC^-1 D. Nm^-2C
6	A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be	A. Zero B. 10Ω C. 1Ω D. 0.10Ω
7	The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is	A. 4/5Ω B. 5/4Ω C. 20Ω D. 0.05 Ω
8	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
9	The concept of field theory was put forward by	A. Franklin B. Kepler C. Oersted D. Michael Faraday
10	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

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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

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Coulomb's force between two point charges depends upon

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

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

At ordinary temperature, an increase in temperature increases the conductivity of

The resistance of the given conductor can be increased by

The value of electrical constant of proportionality k is

The resistance of a conductor does not depend on its

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

Coulomb force, when any material medium is placed between two charges

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)

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

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

The energy stored in a charge capacitor

An electric charge at rest is

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

One electron volt is equal to

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Which one of the following causes production of heat when current is set up in a wire?

The SI unit of permitivity is

The dot product of electric field intensity E and vector area A is called

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

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

The nature of capacity of electrostatic capacitor depends on

At any point on the right bisector of the line joining two equal and opposite charges

The liquid which conduct current is known as

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

Thermocouple is an arrangement of two different metals

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

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ECAT Physics Chapter 12 Important MCQ's

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