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 minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is	A. 4/5Ω B. 5/4Ω C. 20Ω D. 0.05 Ω
2	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
3	A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes	A. 2R B. 4R C. 16R D. Zero
4	Coulomb force, when any material medium is placed between two charges	A. Increases B. Decreases C. Remain unchanged D. None of these
5	Electron volt is the unit of.	A. Potential difference B. Energy C. Resistance D. Capacitance
6	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. Zero B. 5μC m^-2 C. 20μC m^-2 D. 8μC m^-2
7	A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be	A. 2 R B. R C. R/2 D. R/4
8	The unit of resistance is	A. volt B. ampere C. ohm D. coat
9	The substances whose resistance decreases with the increase in temperature these substances have coefficient of	A. positive temperature B. negative temperature C. absolute temperature D. zero temperature
10	The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is	A. 9 x 10⁵V B. 9 V C. 8 x 10⁶V D. 80 V

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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 unit of resistivity is

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

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

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

The resistance of an incandescent lamp is

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

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

The SI unit of permitivity is

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

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

The resistance of a conductor does not depend on its

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

Electric flux is defined by the relation

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

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

Ohm is the unit of

Capacitance of two or more capacitors

Which of the following represents an electric current?

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

In a charged capacitor the energy is stored in

The resistivity of a substance depends upon the

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

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

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

Solar cell converts sunlight directly into

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

The unit of resistance is

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

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

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ECAT Physics Chapter 12 Important MCQ's

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