Physics, asked by aaysha61435, 10 months ago

A nichrome wire PQ is dipped in water and current is passed through it . what happens to the current in the circuit and heat generated in the wire if the nichrome wire is repaced by an aluminium wire of same length and thickness as that of the nichrome wire

Answers

Answered by CarliReifsteck
1

Given that,

A nichrome wire PQ is dipped in water and current is passed through it.

We know that,

Resistivity of nichrome is

\rho=100\times10^{-8}\ \Omega

Resistivity of aluminium is

\rho=2.65\times10^{-8}\ \Omega

We need to find what happen to the current in the circuit

When the nichrome wire is replaced by an aluminium wire of same length and thickness as that of the nichrome wire  then the high current will passed in the circuit.

Because resistivity of aluminium is very low compared to nichrome.

So, more heat will be generated in aluminium wire.

The resistivity of nichrome is very high so the low current will be passed in the circuit

Hence, The high current will passed in the circuit.

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