Question

3. A 1500 w hair dryer operates on a household outlet of 120 V. What is its resistance? (1 point) 09.6 Ω 012.5 Ω O 10.40 08.1 Ω potnt) 4 A resistor has a 15.0 V potential difference across its ends. It develops thermal energy at a rate of 327 W. What is the current in the resistor? O68.8 A 014.5 A 045.9 A 021.8 A

Answer 1

Using the ohm's law V = IR and power = V times I (1) Power P = 1500 w voltage V = 120 V is P = V times I = V times V/R P = V^2/R substituting the values is P = 120^2/R 1500 = 120^2/R R = 9.6 Ohm Given V = 15 V Power P = 327 omega using the formula P = V times I 327 = 15 times I I = 21.8 A