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	In a charged capacitor the energy is stored in	A. Both in positive and negative charges B. Positive charges C. The edges of the capacitor plates D. The electric field between the plates
2	The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is	A. 10Ω B. 20Ω C. 30Ω D. 40Ω
3	Electric generators which convert mechanical energy into	A. solar energy B. thermal energy C. kinetic energy D. electrical energy
4	Ohm is the unit of	A. current B. capacitance C. energy D. resistance
5	If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be	A. 6 ohm B. 4 ohm C. zero ohm D. 1.33 ohm
6	What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?	A. 10^-1A B. 10^-2A C. 10^-4A D. 1 mA
7	At ordinary temperature, an increase in temperature increases the conductivity of	A. Conductor B. Semiconductor C. Insulator D. Alloy
8	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	A. 10μF B. 20μF C. 30μF D. 15μF
9	The electric field due to an infinite long thin wire at a distance R varies as	A. 1/R B. 1/R² C. R D. R²
10	Magnetic effect at a point caused due to flow a current depend upon the	A. Quantity of current B. Distance from current C. Both the quantity of current and distance from current element D. None of the all

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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

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

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

The unit of resistivity is

The conductivity of a superconductor is

Cause of heat production in a current carrying conductor is

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

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

Ohm's law states that

In a charged capacitor the energy is stored in

The capacitance of a parallel plate capacitor depends upon

The electric flux is linked with a surface will be maximum when

The SI unit of electric field intensity is

Battery is charged in motor cars, which is based on

The SI unit of capacitance is

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

One electron volt is equal to

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?

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

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Free electrons are

The thermistors are usually made of

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 unit of resistance is

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

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

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

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

A condenser of capacity 50μF is charged to 10 V.The energy stored is

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ECAT Physics Chapter 12 Important MCQ's

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What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?

The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

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