Electricity and Magnetism

Subject: Science

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Overview

On completion of this lesson, students should be able to:
  • Explain the working of electric circuit.
  • Differentiate series and parallel combination of cells and resistors.
  • Describe how domestic wiring is done.
  • Solve the numerical problems related to cost of electricity.
  • Explain the working and use of electromagnet.
  • Explain internal working of transformer electric motor and current generator with diagrams.
  • State and explain the Faraday's law of electromagnetic induction.

Notes

Introduction to Electricity

The path that is made of a conducting wire that carries current from negative terminal of a source to positive terminal of the source is called electric circuit. This note provides an information about electricity and types of circuits Learn More

Types of Current and Domestic Electrification

There are two types of current. They are AC current and DC current. In DC current polarity of current does not change while in Ac current polarity is changed. This note explains about types of current i.e. AC and DC currents.

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Combination of Cells

The cells which are connected in such a way that the potential difference of the circuit is same as the cells used in the circuit but the time of current flowing increases is known as parallel combination. This note summarizes parallel and series combination of the cells. Learn More

Electric Load

There are two connection of loads in a circuit. They are parallel connection and series connection. This note has brief introduction on electric loads and how they can be connected to a circuit. Learn More

Electric Power Consumption

To calculate total power consumption of a home, we need to know the power of each equipment, number of equipments and time they run. This note explains about the electric power consumption in our house. Learn More

Heating and Lighting Effect of Current Electricity

Heating effect can be increased by use of the heating element. Similarly, Lighting effect of electricity can be achieved by various ways like filament lamp, fluorescent lamp etc. This chapter explains how current electricity can be used to produce lighting and heating effect. Learn More

Chemical Effect of Current

Electrolysis is the process of decomposition of an electrolytic solution into its constituent passing an electric current through it. This note illustrates different chemical effects of current. Learn More

Electromagnetic Induction

Electrical generators or dynamo are the machines used to convert mechanical energy into electrical energy.They are based on the principle of electromagnetic induction. This note explains about electromagnetic induction and Faraday's laws for electromagnetic induction.

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Electric Motor and Bicycle Dynamo

When a current carrying a conductor is kept in a magnetic field the conductor moves, if it is allowed to do so. This is called motor effect. This note has brief description of electric motor and bicycle dynamo with the example. Learn More

Transformer

A transformer is a device used to convert low a.c. voltage into high a.c. voltage and vice versa. This note has short description about electric transformer and its type Learn More

Electromagnet

A solenoid is made by winding a length of insulated wire around a magnetic material such as iron bar. This note has brief description of electromagnet with the workings of electric bell. Learn More

Magnetic Effect of Current

When an electric current is passed through a conductor, it behaves like a magnet. This is called magnetic effect of current. This note has short description in how magnetic fields are generated when current is passed through a wire. Learn More

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