ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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suzi 10 - Feb - 2026 08 Min 22 Sec 64/120

ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	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
2	The SI unit of current is	A. watt B. coulomb C. volt D. ampere
3	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	A. 1/3 V B. 2/3 V C. 3/2 V D. 3V
4	Resistance of a conductor is increased, the currant will	A. Decrease B. Increase C. Remain the same D. None of these
5	A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor	A. Increases B. Decreases C. Remain unchanged D. Becomes infinite
6	The relation V = IR represents	A. Ampere law B. Faraday's law C. Ohm's law D. Len's law
7	The resistance of a conductor does not depend on its	A. mass B. resistivity C. length D. cross-sectional area
8	One coulomb per second is equal to	A. One volt B. One ampere C. One hom D. One henry
9	One joule is equal to	A. 1.6 x 10¹⁹eV B. 6.25 x 10¹⁸eV C. 1.6 x 18¹⁸eV D. 6.25 x 10¹⁹eV
10	If the distance of separation between two chares is increased, the electrical potential energy of the system will	A. Increase B. Decrease C. May increase or decrease D. Remain the same

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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

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 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

The electric field will be uniform

The SI unit of permitivity is

The graphical representation of ohm's law is

If the two charges in Coulomb's law have double distance between them, then electric force

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

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

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

Resistance of a conductor depends upon

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

The value of electrical constant of proportionality k is

The conductivity of a superconductor is

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

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

The liquid which conduct current is known as

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 electric flux is linked with a surface will be maximum when

Electric potential of earth is taken to be zero because the earth is good

The electric field intensity at a point due to a point charge

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

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

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

Magnetic effect at a point caused due to flow a current depend upon the

Consider a spherical shell of metal at he centre of which a positive point charge is kept

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

One joule is equal to

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

The unit of resistance is

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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

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