An electric flat iron draws a current of 15 A when connected to a 110 V line. a. Assuming that the heating element of the flat iron obeys Ohm’s Law, what is its resistance? b. What is the resistivity of the heating element if it is a wire that is 2.5 cm long with cross-sectional area of 2x10-4 cm long.

Physics for Scientists and Engineers: Foundations and Connections
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Chapter28: Current And Resistance
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An electric flat iron draws a current of 15 A when connected to a 110 V line.

a. Assuming that the heating element of the flat iron obeys Ohm’s Law, what is its resistance?

b. What is the resistivity of the heating element if it is a wire that is 2.5 cm long with cross-sectional area of 2x10-4 cm long.

 

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