ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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Humera Noor 27 - Dec - 2024 19 Min 28 Sec 65/120
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ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	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
2	If we increase the distance between two plates of the capacitor, the capacitance will	A. Increase B. Decrease C. Remain same D. First increase then decrease
3	Which of the following represents an electric current?	A. C^-1 B. CS^-1 C. J.S^-1 D. dynes^-1
4	A conducting wire is drawn to double its length. Final resistivity of the material will be	A. Double of the original one B. Half of the original one C. One fourth of the original one D. Same as original one
5	Surface density of charge is defined as	A. Charge per unit volume B. Charge per unit length C. Charge per unit area D. Charge per unit mass
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	The graphical representation of ohm's law is	A. hyperbola B. straight line C. ellipse D. parabola
8	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
9	A 60 W bulb operates on 220 V supply. The current flowing through the bulb is	A. 11/3 A B. 3 A C. 3/11 A D. 6
10	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

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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

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

The energy stored in a charge capacitor

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

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

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

The speed of randomly moving electrons depends upon

Which of the following represents an electric current?

The capacity of a parallel plat capacitor depends on the

The conductivity of a superconductor is

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

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

One coulomb of charge is created by

Free electrons are

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

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

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

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

Ohm's law states that

The minimum charge on any object can not be less than

The unit of resistivity is

If the two charges in Coulomb's law have double distance between them, then electric force

Electric generators which convert mechanical energy into

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

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

In a charged capacitor the energy is stored in

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?

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

The concept of field theory was put forward by

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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

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

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is