Physics GK · all questions

Electricity and Magnetism
practice.

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Q101

Who demonstrated by composition of electromagnetism and light that light is an electromagnetic wave?

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Q102

Which of the following causes of power loss in AC circuit generally:

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Q103

Assertion (A) The coulomb force is the dominating force in the universe.
Reason (R) The Coulomb force is stronger than the gravitational force.

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Q104

A shop uses 250 units of energy in a month. How much energy was used in joules?

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Q105

Brightness of the bulb decreases gradually with its period of use because of

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Q106

Two resistors of 20 Ω are connected in parallel to each other in a circuit. Then, this combination is added with a resistance of 10 Ω in series. What will be their equivalent resistance?

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Q107

When a potential difference of 140 V applied to a resistance of 10 Ω, calculate the amount of flowing current through it.

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Q108

According to the international colour code for electrical wire, which of the following options represents neutral wire.

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Q109

In electric apparatus 'Earth' is used

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Q110

Ratio of voltage and direct current in a closed electric circuit:

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Q111

The resistance of a conductor is directly proportional to:

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Q112

. . . . . . . . is used in the automatic heating appliances to control the temperature.

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Q113

Which of the following is the purpose for which a transformer is used?

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Q114

Which of the following components does not affect the resistance of a conductor?

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Q115

A 200W electric bulb is used daily for 10 h. Calculate the energy consumed by bulb in a day.

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Q116

Full form of CFL used in place of electric bulbs is

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Q117

A generator converts

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Q118

What will be the effect on the current if the resistance of a circuit is reduced to half, keeping the voltage remains constant?

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Q119

What will be the direction of the magnetic field at a point below a horizontal electric line with a current flowing from east to west when viewed from the west?

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Q120

. . . . . . . . is the "work done in moving a unit charge between two points in an electric circuit."

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