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	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
2	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. 25 B. 225 C. 625 D. 1250
3	A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be	A. 64 W B. 80 W C. 100 W D. 125 W
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 charge per unit time through any cross-section of a conductor is called	A. capacitance B. electric power C. current D. potential difference
6	If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be	A. 0.1 watt B. 1 watt C. 10 watt D. 100 watt
7	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
8	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
9	A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance	A. Increase k time B. Decreases k times C. Decreases 1/K times D. Remains unchanged
10	A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J	A. 5 B. 0.5 C. 0.005 D. 50

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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

Ohm's law states that

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

The relation between charge 'Q' and current 'I' is given by

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

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

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

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

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

Heating effect caused by an electric circuit is written

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

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Thermocouple is an arrangement of two different metals

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

The unit of intensity of electric field is

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)

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Ohm established a relation between

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

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

The charge per unit time through any cross-section of a conductor is called

The charge carriers in electrolyte are positive and negative

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

The electric field will be uniform

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

Which of the following represents an electric current?

Solar cell converts sunlight directly into

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

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ECAT Physics Chapter 12 Important MCQ's

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The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be

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