Foundation Science Primary 6 Energy

Siti switched on a battery-operated radio. Which of the following shows the energy conversion that takes place?

A Chemical potential energy → Kinetic energy → Sound energy
B Electrical energy → Sound energy
C Chemical potential energy → Electrical energy → Sound energy + Heat energy
D Kinetic energy → Electrical energy → Sound energy
Show Worked Solution

Worked Solution

Step 1: Identify the energy source. The radio uses batteries, which store chemical potential energy. Step 2: Identify the intermediate form. When the circuit is closed, chemical energy is converted to electrical energy. Step 3: Identify the output forms. Electrical energy is converted to sound energy and some wasted heat energy.

Correct answer: Chemical potential energy → Electrical energy → Sound energy + Heat energy

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