Question

ی A platinum resistance thermometer has a resistance of 50 ohm at 20°C. When dipped in a liquid the resistance becomes 76.8 ohm . The temperature coefficient of resistance for platinum is alpha= 3.92 x 10^-3/°C. The temperature of the liquid is (1) 100°C (2) 137°C (3) 167°C (4) 200°C​

Answer 1

Answer:

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Explanation:

Correct option is

C

167

o

C

R

2

R

1

=

(1+αt

2

)

(1+αt

1

)

⇒

76.8

50

=

(1+3.92×10

−3

t)

(1+3.92×10

−3

×20)

⇒t=167

o

C