An array of 8 identical miniature grow-lamps is connected in series with a 24 V DC power supply in a horticultural seed incubator.
What is the voltage across each grow-lamp in this series circuit?
Each grow-lamp has an operating power of 9.0 W. State the equation linking power, current, and voltage.
Show that the current flowing in the circuit is 3.0 A.
The incubator is programmed to run the grow-lamps for 5 hours a day over a period of 3 days. Calculate the total energy transferred by the grow-lamps during this time in joules (J).
Describe the main energy transfers that take place in each grow-lamp when connected to the power supply.
