In Class 10 Science (Electricity), we learn that when an electric current passes through a high-resistance wire, the wire gets hot. This phenomenon is called the Heating Effect of Electric Current.
Principle: Electrical energy converts to Heat energy due to resistance.
Joule's Formula: H = I²Rt.
Common Alloy used: Nichrome (because it has high resistance and doesn't melt easily).
Application: Irons, heaters, toasters, and fuses.
When electrons flow through a conductor (like a wire), they constantly collide with the atoms of the wire. These collisions create friction/resistance. To maintain the flow of current against this resistance, the electrical energy from the battery is continuously converted into heat energy.
James Prescott Joule formulated a law to calculate exactly how much heat is produced. The heat produced (H) in a resistor is:
Formula: H = I²Rt (Where H is Heat in Joules, I is Current in Amperes, R is Resistance in Ohms, and t is time in seconds).
We intentionally use high-resistance alloys (like Nichrome) to generate heat in daily appliances:
When an electric current is passed through a high-resistance wire, the wire becomes hot and produces heat. This is known as the heating effect of electric current.
The formula is H = I²Rt, meaning heat produced is equal to the square of the current, multiplied by the resistance, multiplied by the time.
1 kWh is Equal to How Many Joules? — Kilowatt-Hour Explained
1 kWh (kilowatt-hour) is equal to 3,600,000 joules (3.6 MJ). Learn the conversion formula, derivation, and practical examples of kWh.
1 Micron to mm — How Many Millimetres is 1 Micron?
1 micron (micrometre, μm) is equal to 0.001 mm. Learn the conversion between microns, millimetres, metres, and nanometres with examples.
1 Nanometre (nm) Is Equal to How Much?
1 nanometre (nm) = 10⁻⁹ metres = 10 angstroms = 1000 picometres. Complete nanometre unit conversion table with examples from physics and chemistry.
1 Newton is Equal to What? | 1 Horsepower in Watts
Learn the exact definition of 1 Newton (unit of force) and 1 Horsepower (unit of power). Understand their formulas and everyday examples.
1 nm is Equal to How Many Meters?
Find out exactly what 1 nm is equal to. Learn the conversion between nanometers (nm), meters (m), centimeters (cm), and angstroms.
Turn this guide into revision flashcards, a practice exam, or an AI-generated podcast — free, no signup required.