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	Which one of the following has larger value of relative permitivity E_rat room temperature?	A. Vaccum B. Air C. Glass D. Water
2	The resistance of a conductor does not depend on its	A. mass B. resistivity C. length D. cross-sectional area
3	Electric flux is defined by the relation	A. E.A. B. E x A C. E/A D. none of these
4	The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will	A. Increase B. Decrease C. Remain F D. Become 10F/9
5	Which of the following does not obey ohm's law?	A. Copper B. Al C. Diode D. None
6	The potential difference across each resistance in series combination is	A. same B. different C. zero D. none of these
7	The electrode connected with the positive terminal of the current source is called	A. cathode B. anode C. electrolyte D. position
8	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
9	The charge carriers in electrolyte are positive and negative	A. protons B. electrons C. ions D. none of these
10	If the length of the conductor is double and its cross sectional area is halved, its conductance will	A. Increase four fold B. Become one-fourth C. Become one-half D. Remains unchanged

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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

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

Electric flux is defined by the relation

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

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

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

If a 40 watt light bulb burns for 2 hours. how much heat is generated

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

The conductivity of a superconductor is

The electric field due to an infinite long thin wire at a distance R varies as

The resistance of a conductor does not depend on its

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

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

In a voltmeter the conduction takes place due to

The capacity of a parallel plat capacitor depends on the

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

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

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

The electric flux from a closed surface

The liquid which conduct current is known as

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

The SI unit of electric field intensity is

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

Resistance of a conductor is increased, the currant will

An electric charge at rest is

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

Heating effect caused by an electric circuit is written

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Capacitance of two or more capacitors

Equal charges are given to two spheres of different radii. The potential will

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

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ECAT Physics Chapter 12 Important MCQ's

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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 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

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

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