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 current is	A. watt B. coulomb C. volt D. ampere
2	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed
3	Surface density of charge is defined as	A. Charge per unit volume B. Charge per unit length C. Charge per unit area D. Charge per unit mass
4	A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is	A. Zero B. 0.5Ω C. 1.1Ω D. 5.0Ω
5	The SI unit of electric flux is	A. Weber B. Nm²C^-1 C. NmC^-1 D. Nm^-2C
6	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
7	The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to	A. Coulomb's law B. Gauss's law C. Biot-Sarwat law D. Ampere's law
8	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
9	When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be	A. 180 watt B. 10 watt C. 20 watt D. 60 watt
10	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

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

One joule is equal to

The electric intensity at infinite distance from the point charge will be

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

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

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

The earth's potential is taken as

A conducting wire is drawn to double its length. Final resistivity of the material will be

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

Ohm established a relation between

The electric flux is linked with a surface will be maximum when

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Coulomb's force between two point charges depends upon

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

The capacity of a parallel plat capacitor depends on the

Resistor is a device which convert electric energy to

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 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

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

Ohm's law states that

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)

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

The electric flux from a closed surface

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

One coulomb of charge is created by

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

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

The unit of resistance is

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

The energy stored in a charge capacitor

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Top Scorers Of Physics ECAT Pre Engineering Chapter 12 Electrostatics MCQ`s Test

ECAT Physics Chapter 12 Important MCQ's

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