This supplies electrical current.

This supplies electrical current.

• A. Battery
• B. Cell
• C. Generator
• D. Power supply

Answer: (B)

An electrical current is produced by a source that can convert stored energy into electrical energy, and the basic unit that does this is the cell. A cell stores chemical energy and, when placed in a circuit, drives electrons through the external path as a chemical reaction occurs at the electrodes. This direct conversion of stored energy into current is what the statement is getting at, making the cell the simplest, fundamental source of current. A battery consists of multiple cells, so it’s a larger, assembled source rather than the single unit that actually supplies the current. A generator creates current by converting mechanical energy into electrical energy, not from stored chemical energy, and a power supply is a device that regulates and delivers power to a circuit rather than being the primary energy source itself.

An electrical current is produced by a source that can convert stored energy into electrical energy, and the basic unit that does this is the cell. A cell stores chemical energy and, when placed in a circuit, drives electrons through the external path as a chemical reaction occurs at the electrodes. This direct conversion of stored energy into current is what the statement is getting at, making the cell the simplest, fundamental source of current. A battery consists of multiple cells, so it’s a larger, assembled source rather than the single unit that actually supplies the current. A generator creates current by converting mechanical energy into electrical energy, not from stored chemical energy, and a power supply is a device that regulates and delivers power to a circuit rather than being the primary energy source itself.