Sunday, March 20, 2022

13. Magnetic Effects of Electric Current | Class 10 CBSE | Web Notes | Part 7: Domestic Electric Circuits

MAGNETIC EFFECTS OF ELECTRIC CURRENT


DOMESTIC ELECTRIC CIRCUITS


In homes, electric power is supplied through a main supply (mains), supported through overhead electric poles or by underground cables. In this, one wire is with red insulation cover (live wire or positive) and other wire is with black insulation (neutral wire or negative). In our country, the potential difference between the two is 220 V.

13. Magnetic Effects of Electric Current | Class 10 CBSE | Web Notes | Part 6: Electric Generator

MAGNETIC EFFECTS OF ELECTRIC CURRENT


ELECTRIC GENERATOR


The principle of electromagnetic induction can be applied to produce large currents for use in homes and industry.

13. Magnetic Effects of Electric Current | Class 10 CBSE | Web Notes | Part 5: Electromagnetic Induction

MAGNETIC EFFECTS OF ELECTRIC CURRENT


ELECTROMAGNETIC INDUCTION


Consider a conductor is moving inside a magnetic field or a magnetic field is changing around a fixed conductor. This was first studied by English experimental physicist Michael Faraday (1831). He discovered how a moving magnet can be used to generate electric currents. This effect can be observed by the following activity.

13. Magnetic Effects of Electric Current | Class 10 CBSE | Web Notes | Part 4: Electric Motor

MAGNETIC EFFECTS OF ELECTRIC CURRENT


ELECTRIC MOTOR


It is a rotating device that converts electrical energy to mechanical energy.

13. Magnetic Effects of Electric Current | Class 10 CBSE | Web Notes | Part 3: Force on a Current-Carrying Conductor in a Magnetic Field

MAGNETIC EFFECTS OF ELECTRIC CURRENT



FORCE ON A CURRENT-CARRYING CONDUCTOR IN A MAGNETIC FIELD


An electric current through a conductor produces a magnetic field. This field exerts a force on a magnet placed near the conductor.

13. Magnetic Effects of Electric Current | Class 10 CBSE | Web Notes | Part 2: Magnetic Field due to a Current-Carrying Conductor

MAGNETIC EFFECTS OF ELECTRIC CURRENT


MAGNETIC FIELD DUE TO A CURRENT-CARRYING CONDUCTOR


Experiment to find the direction of the field:

13. Magnetic Effects of Electric Current | Class 10 CBSE | Web Notes | Part 1: Magnetic Field & Field Lines

MAGNETIC EFFECTS OF ELECTRIC CURRENT


Electricity and Magnetism are linked to each other. It can be shown by the following experiment.

Wednesday, March 2, 2022

12. Electricity | Class 10 CBSE | Web Notes | Part 6: Heating Effect of Electric Current, Electric Power

ELECTRICITY


HEATING EFFECT OF ELECTRIC CURRENT


A battery or a cell is a source of electrical energy. It generates potential difference that sets the electrons in motion to flow the current through a resistor or a system of resistors.

12. Electricity | Class 10 CBSE | Web Notes | Part 5: Resistance of a System of Resistors

ELECTRICITY


RESISTANCE OF A SYSTEM OF RESISTORS


In electrical gadgets, resistors are used in various combinations based on Ohm’s law.

12. Electricity | Class 10 CBSE | Web Notes | Part 4: Factors on which the Resistance of a Conductor Depends

ELECTRICITY


FACTORS ON WHICH THE RESISTANCE OF A CONDUCTOR DEPENDS


Note the ammeter reading in an electric circuit with

12. Electricity | Class 10 CBSE | Web Notes | Part 3: Ohm's Law

ELECTRICITY



OHM’S LAW


Set up a circuit consisting of a nichrome wire XY (0.5 m length), an ammeter, a voltmeter and four cells of 1.5 V each. (Nichrome = an alloy of Ni, Cr, Mn & Fe.)

12. Electricity | Class 10 CBSE | Web Notes | Part 2: Electric Potential, Potential Difference, Circuit diagrams

ELECTRICITY


ELECTRIC POTENTIAL AND POTENTIAL DIFFERENCE


Electric charges do not flow in a metallic conductor (e.g. copper wire) by themselves. Here, gravity has no role.

12. Electricity | Class 10 CBSE | Web Notes | Part 1: Electric Current and Circuit

ELECTRICITY


ELECTRIC CURRENT AND CIRCUIT


Flow of electric charges through a conductor (e.g., metallic wire) is called an electric current.