Physics Electricity CBSE Board 2026 Medium
(i) Define electrical resistivity of a material. (ii) How will the resistivity and resistance of a conducting…
- (i)Define electrical resistivity of a material.
- (ii)How will the resistivity and resistance of a conducting wire change if the length and area of cross-section of wire both are doubled ? Justify your answer.
- (iii)Calculate the electric current flowing through a resistor that produces J of heat every second.
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