Question

a device contains an electric circuit, powered by a battery, that provides light energy and heat energy. it is a
a television.
b flashlight.
c car engine.
d barbeque grill.

Explanation:

• A television is powered by electricity (not just a battery) and its main output is visual and audio (not primarily light and heat).
• A flashlight has an electric circuit powered by a battery. Its main purpose is to provide light (and some heat as a by - product of the light - producing process).
• A car engine is powered by fuel (like gasoline or diesel, not a battery in the sense of being the main power source for its primary function of mechanical work).
• A barbeque grill is powered by gas (like propane) or charcoal (not a battery - powered electric circuit).

Answer:

B. flashlight.