Question 284: Current Electricity

Question

Resistance of the wire is measured as 2 $\Omega$ and 3 $\Omega$ at 10$^\circ$C and 30$^\circ$C respectively. Temperature co-efficient of resistance of the material of the wire is :

Accepted Answer

R
10
= 2 = R
0
(1 + $\alpha$ $	imes$ 10)
R
30
= 3 = R
0
(1 + $\alpha$ $	imes$ 30)
On solving
$\alpha$ = 0.033/$^\circ$C

Answer

0.033 $^\circ$C
$-$1

Answer

$-$0.033 $^\circ$C
$-$1

Answer

0.011 $^\circ$C
$-$1

Answer

0.055 $^\circ$C
$-$1

Current Electricity

Resistance of the wire is measured as 2 \Omega and 3 \Omega at 10^\circC and 30^\circC respectively. Temperature co-efficient of resistance of the material of the wire is :

Choose the correct answer: