What is the energy transformation that occurs when a smoke alarm goes off?
a
Electrical to potential
b
Potential to electrical
c
Sound to light
d
Electrical to sound
The correct answer is d) Electrical to sound.
When a smoke alarm goes off, it typically utilizes an electrical circuit powered by a battery or electricity supply. When smoke particles are detected by the alarm, it triggers the electrical circuit to generate a sound alarm, which is the desired outcome. Therefore, the energy transformation that occurs is from electrical energy to sound energy.
The correct answer is option (d) Electrical to sound. When a smoke alarm goes off, the energy transformation that occurs is from electrical energy to sound energy. The electrical circuit in the smoke alarm is triggered by the presence of smoke particles, which then produces an electrical current. This electrical energy is then converted into sound energy by a piezoelectric buzzer or a speaker, creating the loud noise that alerts people to the presence of smoke or fire.
The correct answer is (d) Electrical to sound.
When a smoke alarm goes off, the energy transformation that occurs can be understood by examining how a typical smoke alarm works. Smoke alarms typically contain a small electrical circuit with a power source, such as a battery, and a piezoelectric buzzer.
Here's how the energy transformation happens:
1. Electrical energy: The battery in the smoke alarm provides electrical energy to the circuit. This electrical energy flows through the circuit.
2. Sound energy: Within the smoke alarm, the electrical energy is sent to the piezoelectric buzzer. The piezoelectric material vibrates when it receives an electric signal. These vibrations create sound waves, converting the electrical energy into sound energy.
3. Sound: The sound energy produced by the piezoelectric buzzer creates the loud beeping or alarm sound that alerts occupants of the presence of smoke.
Therefore, in the case of a smoke alarm, the primary energy transformation is from electrical energy to sound energy.