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Questions on Energy Transitions

Q9. Jacquie has a mobile phone (UK term for a cell phone). Energy is stored in the battery of the phone. The drawing shows the battery being charged.

(a) Which energy transfer takes place in the battery as it is being charged?

A
 chemical to sound
B
 sound to thermal
C
 electrical to chemical
D
 thermal to electrical

1 mark

(b) When the battery is fully charged, Jacquie unplugs the phone. Which energy transfers take place when the mobile phone rings?

A
chemical to electrical to sound
B
electrical to chemical to sound
C
kinetic to electrical to sound
D
thermal to electrical to sound

1 mark

Total 2 marks