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	Heating effect caused by an electric circuit is written	A. H = I²Rt B. H = I²R C. H = IR²t D. H = IR²
2	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
3	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
4	Electron volt is the unit of.	A. Potential difference B. Energy C. Resistance D. Capacitance
5	The dot product of electric field intensity E and vector area A is called	A. Electric potential B. Electric flux C. Electric field D. Magnetic field
6	If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is	A. one ohm B. one joule C. one volt D. one ampere
7	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
8	The conductivity of a superconductor is	A. Infinite B. Very large C. Very small D. Zero
9	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. 7.20 N B. 11.25 N C. 22.50 N D. 45.00
10	Which one of the following is the unit of electric field intensity	A. JC^-1 B. Vm^-1 C. Cm^-1 D. CJ^-1

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

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?

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

The electric flux is linked with a surface will be maximum when

Ohm is the unit of

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

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

Resistor is a device which convert electric energy to

The earth's potential is taken as

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

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

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

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

The conductivity of a superconductor is

The SI unit of electric field intensity is

Current provided by a battery is maximum when

An electric charge at rest is

The resistance of the given conductor can be increased by

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

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

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

The fractional change in resistance per kelvin is known as

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

The resistivity of a substance depends upon the

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?

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

Specific resistance of a wire depends upon

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

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

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ECAT Physics Chapter 12 Important MCQ's

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