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 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
2	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
3	Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be	A. 0.52 A B. 1 mA C. 0.7 mA D. 1.4 A
4	A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?	A. Electric potential at the surface of the cube is zero B. Electric potential within the cube is zero C. Electric filed is normal to the surface of the cube D. Electric filed varies within the cube
5	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
6	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?	A. 60 W bulb B. 100 W bulb C. Both equally D. None of these
7	The electric flux is linked with a surface will be maximum when	A. The surface is held parallel to the electric field B. The surface is held perpendicular to the electric field C. The surface makes an angle of 45° with the electric field D. All of the above
8	If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be	A. 0.1 watt B. 1 watt C. 10 watt D. 100 watt
9	The SI unit of electric flux is	A. Weber B. Nm²C^-1 C. NmC^-1 D. Nm^-2C
10	At any point on the right bisector of the line joining two equal and opposite charges	A. At electric field is zero B. The electric potential is zero C. The electric potential decreases with increasing distance from the centre D. The electric field is perpendicular to the line joining the charges

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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

One electron volt is equal to

The electric field will be uniform

The SI unit of capacitance is

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

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

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

The SI unit of electric field intensity is

In a charged capacitor the energy is stored in

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

The unit of resistance is

The charge carriers in gases are

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

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

Solar cell converts sunlight directly into

A conducting wire is drawn to double its length. Final resistivity of the material will be

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

Ohm is the unit of

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

The unit of conductance is

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

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

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

The potential difference across each resistance in series combination is

The relation between charge 'Q' and current 'I' is given by

The SI unit of permitivity is

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

The liquid which conduct current is known as

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

The conductivity of a superconductor is

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ECAT Physics Chapter 12 Important MCQ's

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

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