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	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
2	The speed of randomly moving electrons depends upon	A. pressure B. volume C. temperature D. mass
3	The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as	A. voltmeters B. resistance C. electrode D. current
4	One electron volt is equal to	A. 1.6 x 1019eV B. 6.25 x 1018 eV C. 1.6 x 1018 eV D. 6.25 x 1019eV
5	Electron volt is the unit of.	A. Potential difference B. Energy C. Resistance D. Capacitance
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	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
8	10⁶electrons are moving through a wire per second, the current developed is	A. 1.6 x 10^-19 B. 1 A C. 1.6 x 10^-15A D. 10⁶A
9	A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then	A. The charge in the plates reduces and potential difference increase B. Potential difference between the plates increase, stored energy decreases and charge remains the same C. Potential difference between the plates decreases and charge remains unchanged D. None of the above
10	Equal charges are given to two spheres of different radii. The potential will	A. Be more on the smaller sphere B. Be more on the bigger sphere C. Be equal on both the sphere D. Depend on the nature of the material of the sphere

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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

The potential difference across each resistance in series combination is

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

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

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

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

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

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

The capacitance of a parallel plate capacitor depends upon

The capacity of a parallel plat capacitor depends on the

The fractional change in resistance per kelvin is known as

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

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

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 energy stored in a charge capacitor

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

Which one of the following is the unit of electric field intensity

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

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

The electric flux from a closed surface

One joule is equal to

The relation V = IR represents

Specific resistance of a wire depends upon

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

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

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

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

Resistance of a conductor depends upon

One coulomb per second is equal to

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

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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

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

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