Question 304: Current Electricity

Question

The resistance of a conductor at 15$^\circ$C is 16$\Omega$ and at 100$^\circ$C is 20$\Omega$. What will be the temperature coefficient of resistance of the conductor?

Accepted Answer

16 = R
0
[1 + $\alpha$ (15 $-$ T
0
)]
20 = R
0
[1 + $\alpha$ (100 $-$ T
0
)]
Assuming T
0
= 0$^\circ$C, as a general convention.
$\Rightarrow$ ${{16} \over {20}} = {{1 + \alpha  	imes 15} \over {1 + \alpha  	imes 100}}$
$\Rightarrow$ $\alpha$ = 0.003$^\circ$C
$-$1

Answer

0.010$^\circ$C
$-$1

Answer

0.033$^\circ$C
$-$1

Answer

0.003$^\circ$C
$-$1

Answer

0.042$^\circ$C
$-$1

Current Electricity

The resistance of a conductor at 15^\circC is 16\Omega and at 100^\circC is 20\Omega. What will be the temperature coefficient of resistance of the conductor?

Choose the correct answer: