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2 cards from this section. Quick, good the night before a test.
What does Joule's law state?
Remember the formula H = I²Rt.
Name two appliances that utilize the heating effect of electric current.
Think of appliances that generate heat to perform their function.
What is the formula for calculating heat produced in a resistor?
Remember that heat is involved with current and resistance.
True or False: Fuses are designed to allow the current to exceed safe limits.
Think about the safety purpose of a fuse.
An electric iron has a resistance of 20 Ω and operates at 240 V. Calculate the power consumed.
Use the power formula that relates voltage and resistance.
How much heat is produced when a 3 A current flows through a 6 Ω resistor for 15 seconds?
Substitute the values into Joule’s law carefully.
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