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 minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is	A. 4/5Ω B. 5/4Ω C. 20Ω D. 0.05 Ω
2	Resistance of a conductor is increased, the currant will	A. Decrease B. Increase C. Remain the same D. None of these
3	The SI unit of conductivity is	A. ohm-m B. ohm^-1m^-1 C. ohm-m^-1 D. ohm^-1m
4	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
5	If the two charges in Coulomb's law have double distance between them, then electric force	A. Becomes two-fold B. Becomes four-fold C. Remains the same D. None of these
6	Ohm is the unit of	A. current B. capacitance C. energy D. resistance
7	The value of electrical constant of proportionality k is	A. 9 x 10⁹Nm²C^-2 B. 9 x 10^-9Nm²C^-2 C. 9 x 10¹⁰Nm²C² D. 9.85 x 10^-12N^-1C^-2
8	The current through a metallic conductor is due to the motion of	A. protons B. neutrons C. electrons D. free electrons
9	The fractional change in resistance per kelvin is known as	A. temperature coefficient B. resistance coefficient C. super temperature D. critical temperature
10	One coulomb per second is equal to	A. One volt B. One ampere C. One hom D. One henry

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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 established a relation between

Resistance of a conductor depends upon

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

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

If the distance of separation between two chares is increased, the electrical potential energy of the system will

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

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Equal charges are given to two spheres of different radii. The potential will

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

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

One coulomb per second is equal to

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

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

If electric and gravitational force on an electron in a uniform electric field will be

At any point on the right bisector of the line joining two equal and opposite charges

The conductivity of a superconductor is

Potentiometer is more sensitive than voltmeter, because

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

The SI unit of current is

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

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

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

The ohm's is defined as

Capacitance of two or more capacitors

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?

The thermistors are usually made of

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

Heating effect caused by an electric circuit is written

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ECAT Physics Chapter 12 Important MCQ's

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