Question

The resistance of a platinum wire is 150 at
20°C. This wire is put in a hot furnace and
the resistance of the wire is found to be 400.
Find the temperature of the hot furnace if
temperature coefficient of resistance of
platinum is 3.6 x 10°C-
efficient of​

Answer 1

Explanation:

Here R

0

=5Ω,

R

100

=5.23Ω,R

t

=5.795Ω

As α=

R

0

×t

R

100

−R

0

∴t=

R

100

−R

0

R

t

−R

0

×100

=

5.23−5

5.795−5

×100

=346.65

∘

C