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	Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be	A. 711μF B. 611μF C. 811μF D. 511μF
2	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
3	The SI unit of capacitance is	A. Farad B. Henry C. Ohm D. Volt
4	If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be	A. 5μF B. 20μF C. 10μF D. 15μF
5	Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be	A. 0.52 A B. 1 mA C. 0.7 mA D. 1.4 A
6	The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is	A. 21 x 10³+ 10% B. 23 x 10¹+ 10% C. 21 x 10³+ 5% D. 12 x 10³+ 5%
7		A. 5μF B. 10μF C. 3μF D. 6μF
8	At any point on the right bisector of the line joining two equal and opposite charges	A. At electric field is zero B. The electric potential is zero C. The electric potential decreases with increasing distance from the centre D. The electric field is perpendicular to the line joining the charges
9	One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is	A. 0.1 V B. 8 V C. 2 V D. 0.5 V
10	The speed of randomly moving electrons depends upon	A. pressure B. volume C. temperature D. mass

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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

An electric charge at rest is

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

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

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

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

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

The electric flux from a closed surface

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

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

The energy stored in a charge capacitor

Magnetic effect at a point caused due to flow a current depend upon the

The unit of intensity of electric field is

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

The conductivity of a superconductor is

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

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

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

Resistor is a device which convert electric energy to

Which of the following does not obey ohm's law?

The charge carriers in electrolyte are positive and negative

The speed of randomly moving electrons depends upon

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

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

The fractional change in resistance per kelvin is known as

The earth's potential is taken as

Heating effect caused by an electric circuit is written

Some charge is being given to a conductor. Then its potential

The graphical representation of ohm's law is

Which of the following represents an electric current?

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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

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be