Which term refers to a rechargeable energy storage device that can be recharged multiple times when current from another source is passed in the opposite direction?

• A. Primary/Dry Cell
• B. Resistor
• C. Semiconductors
• D. Secondary Cell

Answer: (D)

A rechargeable energy storage device is designed so that when you push current from another source through it in the opposite direction, the stored chemical energy is rebuilt. This makes it a secondary cell, which can be charged and discharged many times. Primary cells, like dry cells, are intended for single use and aren’t practical to recharge. Resistors are passive components that convert electrical energy into heat, not energy storage devices, and semiconductors are materials used to control or detect electrical signals, not to store energy. Examples of secondary cells include lead-acid, nickel-metal hydride, and lithium-ion batteries.