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	10⁶electrons are moving through a wire per second, the current developed is	A. 1.6 x 10^-19 B. 1 A C. 1.6 x 10^-15A D. 10⁶A
2	Ohm is the unit of	A. current B. capacitance C. energy D. resistance
3	Specific resistance of a wire depends upon	A. Length B. Cross-section area C. Mass D. None
4	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed
5	If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us	A. parabola B. straight line C. hyper bola D. ellipse
6	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
7	A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be	A. Zero B. 10Ω C. 1Ω D. 0.10Ω
8	If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be	A. 6 ohm B. 4 ohm C. zero ohm D. 1.33 ohm
9	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
10	The resistance of an incandescent lamp is	A. Smaller when switched on B. Greater when switched off C. The same whether it is switch off or switch on D. Greater when switched on

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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

An electric charge at rest is

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

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

Resistance of a conductor depends upon

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

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

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

Free electrons are

The fractional change in resistance per kelvin is known as

The SI unit of current is

Electron volt is the unit of

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

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

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

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

The unit of resistance is

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

The SI unit of capacitance is

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

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

The electric intensity outside the two oppositely charged parallel metal plates is

One coulomb of charge is created by

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

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

The SI unit of electric field intensity is

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

The minimum charge on any object can not be less than

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

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

Which one of the following is the unit of electric field intensity

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ECAT Physics Chapter 12 Important MCQ's

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

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