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 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
2	Specific resistance of a wire depends upon	A. Length B. Cross-section area C. Mass D. None
3	The relation V = IR represents	A. Ampere law B. Faraday's law C. Ohm's law D. Len's law
4	The minimum charge on any object can not be less than	A. 1.6 x 10^-19C B. 3.2 x 10^-19C C. 1.0 C D. 4.8 x 10^-19C
5	The SI unit of permitivity is	A. Nm²C² B. N^-1m^-2C² C. NmC² D. Nm²C^-1
6	The relation between charge 'Q' and current 'I' is given by	A. Q = I/t B. Q = It C. Q = I²t D. Q = I²/t
7	One coulomb of charge is created by	A. 10 electrons B. 1.6 x 10^-19electrons C. 6.25 x 10¹⁸electrons D. 6.25 x 10²¹electrons
8	At ordinary temperature, an increase in temperature increases the conductivity of	A. Conductor B. Semiconductor C. Insulator D. Alloy
9	Ohm's law states that	A. The current through a resistor is directly proportional to the applied voltage B. The voltage across a resistor is directly proportional to the current passing through it C. Resistance is the constant of proportionality between the voltage and current D. all of these
10	A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?	A. 3 x 10²⁰ B. 3 x 10¹⁰ C. 6 x 10²⁰ D. 6 x 10¹⁰

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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

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

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Resistor is a device which convert electric energy to

The capacitance of a parallel plate capacitor depends upon

Battery is charged in motor cars, which is based on

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?

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

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

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

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

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?

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

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

Coulomb's force between two point charges depends upon

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

The SI unit of current is

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

One electron volt is equal to

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

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

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

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

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

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ECAT Physics Chapter 12 Important MCQ's

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Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?

An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be