ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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Humera Noor 27 - Dec - 2024 19 Min 28 Sec 65/120
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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	The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately	A. 9.8 B. 24 x 10¹⁹ C. 24 x 10⁴² D. 24 x 10^-44
2	Which of the following does not obey ohm's law?	A. Copper B. Al C. Diode D. None
3	The electric lines of force are	A. Imaginary B. Physically existing everywhere C. Physically existing near the charge D. All of the above
4	An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be	A. V/e B. eV C. e/V D. V
5	The liquid which conduct current is known as	A. heating effect B. chemical energy C. electrolyte D. ohm's law
6	Electron volt is the unit of	A. Potential difference B. Energy C. Resistance D. Capacitance
7	The SI unit of current is	A. watt B. coulomb C. volt D. ampere
8	The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be	A. 1 : 2 B. 2 : 1 C. 1 : 4 D. 4 : 1
9	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)	A. Q/4πr² B. 2Q/4πr² C. Q.d D. Zero
10	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. 120 C B. 240 C C. 20 C D. 4 C

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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

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Resistor is a device which convert electric energy to

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

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)

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

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

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

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

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

Which of the following represents an electric current?

Surface density of charge is defined as

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

Battery is charged in motor cars, which is based on

One joule is equal to

The capacity of a parallel plat capacitor depends on the

Capacitance of two or more capacitors

The resistance of an incandescent lamp is

Ohm is the unit of

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

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

The resistance of a conductor does not depend on its

If we increase the distance between two plates of the capacitor, the capacitance will

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

The electric field will be uniform

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

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

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

Current provided by a battery is maximum when

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ECAT Physics Chapter 12 Important MCQ's

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