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	A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be	A. 64 W B. 80 W C. 100 W D. 125 W
2	The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to	A. Coulomb's law B. Gauss's law C. Biot-Sarwat law D. Ampere's law
3	An electric charge at rest is	A. Only an electric field B. Only a magnetic field C. Both electric and magnetic fields D. None of the above
4	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
5	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
6	Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be	A. 0.52 A B. 1 mA C. 0.7 mA D. 1.4 A
7	A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is	A. Zero B. 0.5Ω C. 1.1Ω D. 5.0Ω
8	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
9	A 60 W bulb operates on 220 V supply. The current flowing through the bulb is	A. 11/3 A B. 3 A C. 3/11 A D. 6
10	Which of the following represents an electric current?	A. C^-1 B. CS^-1 C. J.S^-1 D. dynes^-1

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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

Potentiometer is more sensitive than voltmeter, because

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Ohm established a relation between

Magnetic effect at a point caused due to flow a current depend upon the

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

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

The unit of resistance is

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

The current through a metallic conductor is due to the motion of

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

The SI unit of electric field intensity is

The resistance of an incandescent lamp is

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

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

Battery is charged in motor cars, which is based on

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

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

Free electrons are

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 the given conductor can be increased by

The liquid which conduct current is known as

The potential difference across each resistance in series combination is

Specific resistance of a wire depends upon

At ordinary temperature, an increase in temperature increases the conductivity of

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

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

The charge carriers in electrolyte are positive and negative

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

One coulomb per second is equal to

The unit of conductance is

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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

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