PH-1948
Cost of electricity
Physics · Secondary 4 · Hard · Cost of electricity
A 230 V hair dryer draws a current of 4.0 A when in use. What is the cost of using the hair dryer for 30 minutes if electricity costs \$0.25 per kWh?
- \$0.12
- \$0.046
- \$0.23
- \$0.92
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