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 resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is	A. 10Ω B. 20Ω C. 30Ω D. 40Ω
2	Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?	A. 3RΩ B. 2R/4Ω C. R/3Ω D. 2R/3Ω
3	The electric field due to an infinite long thin wire at a distance R varies as	A. 1/R B. 1/R² C. R D. R²
4	If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be	A. 5μF B. 20μF C. 10μF D. 15μF
5	The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as	A. voltmeters B. resistance C. electrode D. current
6	If we increase the distance between two plates of the capacitor, the capacitance will	A. Increase B. Decrease C. Remain same D. First increase then decrease
7	Consider a spherical shell of metal at he centre of which a positive point charge is kept	A. The electric filed is zero outside the shell B. The electric field is zero everywhere C. The electric field is zero in the region inside the shell D. The electric field is non-zero in both regions outside and inside the shell
8	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
9	Which of the following does not obey ohm's law?	A. Copper B. Al C. Diode D. None
10	The conductivity of a superconductor is	A. Infinite B. Very large C. Very small D. Zero

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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

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

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

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

Electric flux is defined by the relation

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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

The speed of randomly moving electrons depends upon

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

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

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

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

The SI unit of electric flux is

The resistance of a conductor does not depend on its

Current provided by a battery is maximum when

The electric flux from a closed surface

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

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

The unit of resistance is

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

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)

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

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 unit of intensity of electric field is

The potential difference across each resistance in series combination is

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

Thermocouple is an arrangement of two different metals

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

If the length of the conductor is double and its cross sectional area is halved, its conductance will

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

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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

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?