360
Question
an electric iron takes a current of 5Aand develops 1.5 x 10 raised to 4 J of heat energy in 30 seconds. calculate the resistance of the electric iron .
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Solution
Given, I = 5 A
H = 1.5 X 104 J
t = 30 s
R = ?
Apply Joule law of heating:
H = I2 RT
Substiute the respective values in the above given expression to get the value of R.
H = 1.5 X 104 J
t = 30 s
R = ?
Apply Joule law of heating:
H = I2 RT
Substiute the respective values in the above given expression to get the value of R.
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