Final answer:
To calculate the energy transferred by the fan, multiply the power of the fan by the time it is turned on.
Step-by-step explanation:
To calculate the energy transferred by the fan, we can use the formula:
E = P * t
Where E is the energy transferred, P is the power in watts, and t is the time in seconds.
Given that the fan has a power of 10V * 2A = 20 watts and it is turned on for 30 seconds, we can calculate the energy transferred as follows:
E = 20 watts * 30 seconds = 600 joules.
Therefore, the energy transferred by the fan in joules is 600 joules.
Learn more about energy transfer