The heating coil in a hair dryer is made of nichrome wire with a radius of 0.225 mm. If the coil draws a current of 9.20 A when there is a 120 v potential difference across its ends, find the following. (Take the resistivity of nichrome to be 1.50 x 10-6 · m.) (a) resistance of the coil (in n) (b) length of wire used to wind the coil (in m) m.
The heating coil in a hair dryer is made of nichrome wire with a radius of 0.225 mm. If the coil draws a current of 9.20 A when there is a 120 v potential difference across its ends, find the following. (Take the resistivity of nichrome to be 1.50 x 10-6 · m.) (a) resistance of the coil (in n) (b) length of wire used to wind the coil (in m) m.
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Transcribed Image Text:The heating coil in a hair dryer is made of nichrome wire with a radius of
0.225 mm. If the coil draws a current of 9.20 A when there is a 120 V
potential difference across its ends, find the following. (Take the resistivity of
nichrome to be 1.50 x 10-6 n · m.)
(a) resistance of the coil (in 0)
(b) length of wire used to wind the coil (in m)
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