Physics Electricity CBSE Board 2026 Medium
(i) What is meant by electrical resistivity of a material? (ii) A series electric circuit comprising a resist…
- (i)What is meant by electrical resistivity of a material ?
- (ii)A series electric circuit comprising a resistor made of a metallic wire has an ammeter which reads mA. If the length of the wire is made three times, what will be the new reading in the ammeter ?
- (iii)Calculate the resistance of a m long aluminium wire of cross-sectional area and resistivity .
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