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

Choose the correct answer: