ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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

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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	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. 2 B. 1 C. 0.5 D. 1.5
2	The speed of randomly moving electrons depends upon	A. pressure B. volume C. temperature D. mass
3	The unit of conductance is	A. ohm B. meter C. mho D. ohm-meter
4	The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is	A. 10 KJ B. 5 KJ C. 2 KJ D. 1 KJ
5	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
6	A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?	A. 200 W B. 302.5 C. 250 W D. 350 W
7	The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become	A. 7.20 N B. 11.25 N C. 22.50 N D. 45.00
8	One coulomb per second is equal to	A. One volt B. One ampere C. One hom D. One henry
9	Magnetic effect at a point caused due to flow a current depend upon the	A. Quantity of current B. Distance from current C. Both the quantity of current and distance from current element D. None of the all
10	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	A. 3/5 ohm B. 2 ohm C. 6/5 ohm D. 3 ohm

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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

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

Capacitance of two or more capacitors

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

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

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

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

The ohm's is defined as

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

The capacity of a parallel plat capacitor depends on the

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

At ordinary temperature, an increase in temperature increases the conductivity 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

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 conductance is

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Resistance of a conductor depends upon

Which of the following represents an electric current?

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

Electric flux is defined by the relation

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

The value of electrical constant of proportionality k is

The SI unit of capacitance is

Heating effect caused by an electric circuit is written

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

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

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

Electron volt is the unit of.

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

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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

An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be