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	A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then	A. The charge in the plates reduces and potential difference increase B. Potential difference between the plates increase, stored energy decreases and charge remains the same C. Potential difference between the plates decreases and charge remains unchanged D. None of the above
2	The electric intensity at infinite distance from the point charge will be	A. Infinite B. Positive C. Zero D. Negative
3	The unit of resistance is	A. volt B. ampere C. ohm D. coat
4	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
5	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
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	Battery is charged in motor cars, which is based on	A. Chemical effect B. Magnetic effect C. Electric effect D. None
8	The electric lines of force are	A. Imaginary B. Physically existing everywhere C. Physically existing near the charge D. All of the above
9	The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become	A. 7.20 N B. 11.25 N C. 22.50 N D. 45.00
10	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

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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 speed of randomly moving electrons depends upon

Potentiometer is more sensitive than voltmeter, because

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

The electric lines of force are

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Resistance of a conductor is increased, the currant will

The SI unit of permitivity is

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

Battery is charged in motor cars, which is based on

Electron volt is the unit of

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

The charge carriers in gases are

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Electric generators which convert mechanical energy into

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

The value of electrical constant of proportionality k is

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

The resistivity of a substance depends upon the

The unit of resistance 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

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

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

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

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

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 capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

The SI unit of electric flux is

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ECAT Physics Chapter 12 Important MCQ's

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

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

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved

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

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then