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	If we increase the distance between two plates of the capacitor, the capacitance will	A. Increase B. Decrease C. Remain same D. First increase then decrease
3	A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be	A. 64 W B. 80 W C. 100 W D. 125 W
4	The electrode connected with the positive terminal of the current source is called	A. cathode B. anode C. electrolyte D. position
5	If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy	A. Ve B. V/e C. e/V D. 2Ve
6	Equal charges are given to two spheres of different radii. The potential will	A. Be more on the smaller sphere B. Be more on the bigger sphere C. Be equal on both the sphere D. Depend on the nature of the material of the sphere
7	Which one of the following causes production of heat when current is set up in a wire?	A. Fall of electrons from higher orbits to lower orbits B. Inter-atomic collisions C. Inter-electron collisions D. Collisions of conduction electron with atoms
8	A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when	A. q = Q/4 B. q = Q/2 C. q = ! D. None of these
9	The liquid which conduct current is known as	A. heating effect B. chemical energy C. electrolyte D. ohm's law
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

The resistance of a conductor does not depend on its

The fractional change in resistance per kelvin is known as

The liquid which conduct current is known as

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 conductance is

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

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

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

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

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

The charge carriers in gases are

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

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

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Surface density of charge is defined as

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

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

Specific resistance of a wire depends upon

Battery is charged in motor cars, which is based on

The energy stored in a charge capacitor

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

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

The electric field intensity at a point due to a point charge

The concept of field theory was put forward by

The speed of randomly moving electrons depends upon

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

The earth's potential is taken as

Resistor is a device which convert electric energy to

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

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ECAT Physics Chapter 12 Important MCQ's

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