Physics-10th Electricity CBSE Board 2022 Medium
(a) Calculate the resistance of a metal wire of length 2\ \text{m} and area of cross-section 1.55 \times 10^{…
- (a)Calculate the resistance of a metal wire of length and area of cross-section . (Resistivity of the metal is )
- (b)Why are alloys preferred over pure metals to make the heating elements of electrical heating devices ?
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