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 charge carriers in electrolyte are positive and negative	A. protons B. electrons C. ions D. none of these
2	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
3	In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called	A. Time constant B. Decay constant C. None of these D. All of above
4	A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is	A. 8 J B. 16 J C. 4 x 10^-3J D. 2 x 10^-3J
5	The capacitance of a parallel plate capacitor depends upon	A. Area of the plates B. Separation between the plates C. Medium between the plates D. All of the above
6	A condenser of capacity 50μF is charged to 10 V.The energy stored is	A. 1.25 x 10^-3J B. 3.75 x 10^-3J C. 2.5 x 10^-3J D. 5 x 10^-3J
7	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
8	Battery is charged in motor cars, which is based on	A. Chemical effect B. Magnetic effect C. Electric effect D. None
9	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
10	An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be	A. 1 MeV B. 2 MeV C. 4 MeV D. 8 MeV

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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 concept of field theory was put forward by

The electric flux from a closed surface

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

The charge carriers in gases are

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

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

The capacitance of a parallel plate capacitor depends upon

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

The thermistors are usually made of

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Electron volt is the unit of.

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

Which of the following represents an electric current?

Capacitance of two or more capacitors

Resistance of a conductor is increased, the currant will

The SI unit of capacitance is

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

The electric field will be uniform

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

The resistance of the given conductor can be increased by

The SI unit of permitivity is

Electric potential of earth is taken to be zero because the earth is good

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

The charge carriers in electrolyte are positive and negative

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?

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

The ohm's is defined as

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

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ECAT Physics Chapter 12 Important MCQ's

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The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is