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