1.

If the resistance of a coil is 2 ohm at 0 degree celcius and a=0.004 degree celcius, then its resistance at 100degree celcius is​

Answer»

Answer:

EXPLANATION:

Given,

R  

T

​  

=4.2ohm

T=100  

0

C

α=0.004/  

0

C

T  

0

​  

=0  

0

C

ΔT=T−T  

0

​  

=100−0=100  

0

C

The RESISTANCE, R  

T

​  

=R  

0

​  

(1+αΔT)

R  

0

​  

=  

(1+αΔT)

R  

T

​  

 

​  

 

R  

0

​  

=  

(1+0.004×100)

4.2

​  

=3Ω

The CORRECT option is A.



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