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# Electricity in Physics - Physics Notes | Study General Science(Prelims) by IRS Divey Sethi - UPSC

## Document Description: Electricity in Physics - Physics for UPSC 2022 is part of General Science(Prelims) by IRS Divey Sethi preparation. The notes and questions for Electricity in Physics - Physics have been prepared according to the UPSC exam syllabus. Information about Electricity in Physics - Physics covers topics like Electric current, Direct &amp; Alternating current, Electromagnetism, &nbsp;Generating Electrical Current, &nbsp;Hydel-Power station, Fuse Wire and Electricity in Physics - Physics Example, for UPSC 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Electricity in Physics - Physics.

Introduction of Electricity in Physics - Physics in English is available as part of our General Science(Prelims) by IRS Divey Sethi for UPSC & Electricity in Physics - Physics in Hindi for General Science(Prelims) by IRS Divey Sethi course. Download more important topics related with notes, lectures and mock test series for UPSC Exam by signing up for free. UPSC: Electricity in Physics - Physics Notes | Study General Science(Prelims) by IRS Divey Sethi - UPSC
 Table of contents Electric current Direct & Alternating current Electromagnetism Generating Electrical Current Hydel-Power station Fuse Wire
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Electric current

• An electric current is a flow of electric charge through an electrical conductor.
• In electric circuits this charge is often carried by moving electrons in a wire.
• It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.
• The SI unit for measuring an electric current is the ampere, which is the flow of electric charges through a surface at the rate of one coulomb per second.
• Electric current can be measured using an ammeter.

Direct & Alternating current

• Direct current (DC) is the unidirectional flow of electric charge.
• Direct current is produced by sources such as batteries, thermocouples, solar cells, and dynamo .
• In alternating current (AC), the movement of electric charge periodically reverses direction.

Electromagnetism

• Electric current produces a magnetic field. The magnetic field can be visualized as a pattern of circular field lines surrounding the wire that persists as long as the current flows.
• Magnetism can also produce electric currents.
• When a changing magnetic field is applied to a conductor, an EMF is produced, and when there is a suitable path, this causes current to flow.
• Electric current can be directly measured with a galvanometer

Electromagnetism

Generating Electrical Current

• Electrical current can be generated by moving a metal wire through a magnetic field.
• This applies both to alternating current (AC) and direct current (DC) electricity.
• This is a different method than where DC is created by a battery, which uses chemical reactions.

Generation of electric current

• Electrical generators rotate a coil of wires through a magnetic field.
• An electric motor is very similar to a generator, except that power is provided to turn the rotors.

Electrical Generators

Hydel-Power station

Hydel Power Station

Fuse Wire

• Fuse Wire is used in a circuit to control the maximum current flowing in a circuit. It is a thin wire having high resistance and is made up of a material with low melting point.
The document Electricity in Physics - Physics Notes | Study General Science(Prelims) by IRS Divey Sethi - UPSC is a part of the UPSC Course General Science(Prelims) by IRS Divey Sethi.
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## General Science(Prelims) by IRS Divey Sethi

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## General Science(Prelims) by IRS Divey Sethi

39 videos|110 docs|255 tests

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