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 electric intensity at infinite distance from the point charge will be	A. Infinite B. Positive C. Zero D. Negative
2	When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates	A. Decreases B. Increases C. No change D. May increase or decresase
3	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	A. power B. current C. resistance D. temperature
4	A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is	A. Zero B. 0.5Ω C. 1.1Ω D. 5.0Ω
5	One joule is equal to	A. 1.6 x 10¹⁹eV B. 6.25 x 10¹⁸eV C. 1.6 x 18¹⁸eV D. 6.25 x 10¹⁹eV
6	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	A. Two B. 1/2 C. Zero D. 3/2
7	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
8	Electric potential of earth is taken to be zero because the earth is good	A. Semiconductor B. Conductor C. Insulator D. Dielectric
9	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
10	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

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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 SI unit of permitivity is

In a charged capacitor the energy is stored in

Ohm's law states that

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

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 electrode connected with the positive terminal of the current source is called

Specific resistance of a wire depends upon

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?

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

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

Which one of the following has larger value of relative permitivity Erat room temperature?

Heating effect caused by an electric circuit is written

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

The resistance of a conductor does not depend on its

The graphical representation of ohm's law is

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

Capacitance of two or more capacitors

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

Electron volt is the unit of

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?

Free electrons are

Battery is charged in motor cars, which is based on

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

The thermistors are usually made of

The capacitance of a parallel plate capacitor depends upon

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

If we increase the distance between two plates of the capacitor, the capacitance will

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

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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Which one of the following has larger value of relative permitivity E_rat room temperature?

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

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