When operated on a household 110.0-v line, typical hair dryers draw about 1650 w of power. we can model the current as a long straight wire in the handlé. during use, the current is about 1.85 cm from the user's hand. what is the current in the dryer? number what is the resistance of the dryer? number what magnetic field does the dryer produce at the user's hand?

Current = 15 A

Resistance = 7.33 ohm

Magnetic field = 1.62 x 10^-4 Tesla

Explanation:

V = 110 V, P = 1650 W, r = 1.85 cm,

(a) Let i be the current

P = V x i

i = 1650 / 110 = 15 A

(b) Let R be the resistance

V = i R

R = 110 / 15 = 7.33 Ohm

(c) Let B be the magnetic field

B = μ0 / 4π x 2i / r

B = 10^-7 x 2 x 15 / 0.0185 = 1.62 x 10^-4 Tesla

a. spokes of a wheel.

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