Factors Affecting Resistance
Resistance to electric current is present in all materials. The amount of resistance depends on certain physical factors. What are they? We will see now. Resistance refers to the opposition…
Ohm’s Law
We know what is current and voltage. Is there any relation between these two? Yes. It is given by a law that is as basic as the alphabet is to…
Basics of Electricity
Electricity powers our everyday lives - from bulbs and fans to TVs, radios, and mobile phones. But has it always existed in human history? Not quite. The electrical devices we…