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 SI unit of electric flux is	A. Weber B. Nm²C^-1 C. NmC^-1 D. Nm^-2C
2	The electric flux is linked with a surface will be maximum when	A. The surface is held parallel to the electric field B. The surface is held perpendicular to the electric field C. The surface makes an angle of 45° with the electric field D. All of the above
3	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
4	The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is	A. 10Ω B. 20Ω C. 30Ω D. 40Ω
5	A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes	A. 2R B. 4R C. 16R D. Zero
6	In a charged capacitor the energy is stored in	A. Both in positive and negative charges B. Positive charges C. The edges of the capacitor plates D. The electric field between the plates
7	The electric flux from a closed surface	A. Is independent of the shape of the surface B. Depends on the charge enclosed by the surface C. Both a and b D. None of the above
8	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed
9	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	A. 1.92 N B. 19.2 N C. 12 N D. 0.192 N
10	The substances whose resistance decreases with the increase in temperature these substances have coefficient of	A. positive temperature B. negative temperature C. absolute temperature D. zero temperature

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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

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

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

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

The resistance of the given conductor can be increased by

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

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

The SI unit of electric flux is

One coulomb per second is equal to

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

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

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

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)

Ohm's law states that

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

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

The conductivity of a superconductor is

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

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

Potentiometer is more sensitive than voltmeter, because

The capacitance of a parallel plate capacitor depends upon

The SI unit of capacitance is

Heating effect caused by an electric circuit is written

Surface density of charge is defined as

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Which of the following represents an electric current?

Coulomb force, when any material medium is placed between two charges

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

The thermistors are usually made of

Coulomb's force between two point charges depends upon

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ECAT Physics Chapter 12 Important MCQ's

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