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 relation V = IR represents	A. Ampere law B. Faraday's law C. Ohm's law D. Len's law
2	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
3	Coulomb's force between two point charges depends upon	A. Magnitude of charges B. Distance between them C. Medium in which they are located D. All of the above
4	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
5	Electric flux is defined by the relation	A. E.A. B. E x A C. E/A D. none of these
6	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
7	Electron volt is the unit of	A. Potential difference B. Energy C. Resistance D. Capacitance
8	An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be	A. 1 MeV B. 2 MeV C. 4 MeV D. 8 MeV
9	A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy	A. 200 J B. 100 J C. 1000 J D. 400 J
10	Which of the following does not obey ohm's law?	A. Copper B. Al C. Diode D. None

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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 colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

One coulomb per second is equal to

Current provided by a battery is maximum when

The SI unit of electric flux is

The resistance of the given conductor can be increased by

Potentiometer is more sensitive than voltmeter, because

Specific resistance of a wire depends upon

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

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

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

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

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

Capacitance of two or more capacitors

The resistance of an incandescent lamp 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

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

The SI unit of electric field intensity is

The thermistors are usually made of

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

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

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

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

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

The SI unit of current is

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

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

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

If a 40 watt light bulb burns for 2 hours. how much heat is generated

The minimum charge on any object can not be less than

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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

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 ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is