The current through a conductor depends on its resistance and the potential difference across its ends. These factors were explored in the preceding sections when discussing simple electric circuits.

Tungsten is used almost exclusively for filaments in electric bulbs because it has a high melting point, allowing it to withstand the intense heat generated by the filament during illumination. On the other hand, copper and aluminium are chosen for ...

Alloys are favored for electrical heating devices because they do not oxidize (burn) readily at high temperatures. This property ensures their durability and stability during prolonged exposure to heat, making them ideal for applications in electric irons, toasters, and other ...

When the length of a wire is doubled, the ammeter reading decreases to one-half. This indicates an inverse relationship between the length of the wire and the current flowing through it.

The ammeter reading increases when a thicker wire of the same material and length is used in the circuit. This is because a thicker wire offers less resistance to the flow of current compared to a thinner wire of the ...