Question

How is the type of current used in household supply different from the one given by dry cells or storage batteries?

Answer 1

Step 1: Household Supply Current
Household supplies utilize alternating current (AC). In AC, the current's direction reverses periodically. The voltage fluctuates between positive and negative values, typically at 50 or 60 Hz, varying by country.

Step 2: Dry Cell and Battery Current
Dry cells and storage batteries provide direct current (DC). DC's current flows unidirectionally, maintaining a stable voltage.

Step 3: Distinguishing Features
1. Current Direction: AC reverses direction; DC flows in a single direction.
2. Origin: AC originates from power stations via transmission lines; DC is sourced from dry cells or batteries.
3. Application: AC powers household appliances; DC is common in portable devices and electronic circuits.

Summary:
AC is employed in household supplies for efficient long-distance transmission. DC is used in dry cells and batteries due to its consistent, unidirectional current flow.