ICSE Class 10 Answered
exercise 8a numerical 12
Asked by nilesh.dhote74 | 10 May, 2020, 10:31: PM
Expert Answer
What length of copper wire of resistivity 1.7 x 10-8 Wm and radius 1 mm is required so that its resistance is 1W.
Resistance (R) = 1 ohm
Resistivity (ρ) = 1.7 x 10-8 ohm metre
Radius (r) = 1 mm = 10-3 m
Length (l) = ?
Answered by Shiwani Sawant | 10 May, 2020, 11:01: PM
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