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 graphical representation of ohm's law is	A. hyperbola B. straight line C. ellipse D. parabola
2	Potentiometer is more sensitive than voltmeter, because	A. Voltmeter has a very high resistance B. Voltmeter has a very low resistance C. Potentiometer does not draw any current from a source of unknown potential difference D. Potentiometer is sensitive
3	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
4	A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?	A. 3 x 10²⁰ B. 3 x 10¹⁰ C. 6 x 10²⁰ D. 6 x 10¹⁰
5	The electric field due to an infinite long thin wire at a distance R varies as	A. 1/R B. 1/R² C. R D. R²
6	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	A. 2 R B. R C. R/2 D. R/4
7	The electric intensity at infinite distance from the point charge will be	A. Infinite B. Positive C. Zero D. Negative
8	If electric and gravitational force on an electron in a uniform electric field will be	A. E=mg/q B. E=q/mg C. E=,g/q D. E=qg/m
9	A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?	A. Electric potential at the surface of the cube is zero B. Electric potential within the cube is zero C. Electric filed is normal to the surface of the cube D. Electric filed varies within the cube
10	The minimum charge on any object can not be less than	A. 1.6 x 10^-19C B. 3.2 x 10^-19C C. 1.0 C D. 4.8 x 10^-19C

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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 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

The nature of capacity of electrostatic capacitor depends on

The electric lines of force are

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

The current through a metallic conductor is due to the motion of

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

Potentiometer is more sensitive than voltmeter, because

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

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

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

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

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

The energy stored in a charge capacitor

If the distance of separation between two chares is increased, the electrical potential energy of the system will

The unit of conductance is

The thermistors are usually made of

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

In a charged capacitor the energy is stored in

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Which one of the following has larger value of relative permitivity Erat room temperature?

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

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

In bringing an electron towards another electron, electrostatic potential energy of system

The value of electrical constant of proportionality k is

A condenser of capacity 50μF is charged to 10 V.The energy stored is

The resistance of the given conductor can be increased by

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

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ECAT Physics Chapter 12 Important MCQ's

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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

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

Which one of the following has larger value of relative permitivity E_rat room temperature?