USAF Electrical Power Production (AFSC 3E0X2) On-Site Power Module 2 Practice Test

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What is the primary energy transformation when a lead-acid battery delivers power to a load?

Stores electrical energy and converts into chemical energy when connected to a load

Stores chemical energy and converts into electrical energy when connected to a load

Lead-acid batteries store energy chemically, and when connected to a load their chemical reactions drive electrons through the external circuit, producing electrical energy for the load. So the main transformation is chemical energy stored in the battery becoming electrical energy that powers the circuit. If the load uses that electricity to do work (like a motor or lamp), the energy is then converted by the load into mechanical, light, or heat, but the battery itself supplies electrical energy from chemical energy.

Stores electrical energy and converts into mechanical energy when connected to a load

Stores chemical energy and converts into sound energy when connected to a load