Question

If the resistor of a known resistance value is replaced with anichrome wire of 10 cm length (say). How do the values of currentthrough the nichrome wire and potential difference across thetwo ends of it may change? How the values will change if thereplaced wire is of manganin in place of nichrome?

Answer 1

Answer:

Alloy failure is usually higher than steel. Therefore, by replacing the counter-value solution known as nichrome wire, the current value of nichrome wire will decrease and the potential difference in both ends will increase.

The resistivity of manganin wire is 44 x 10⁻⁸ Ωm while that of nichrome wire is 100 x 10⁻⁸ Ωm. Therefore, the manganin wire provides less resistance compared to that of the nichrome wire of the same length and the same section of the cross-section. Therefore, the current value of the manganism thread will increase and the potential difference in its edges will decrease.