A water heater produces heat of 2000J in 20 sec. If the heater draws 1A current, find the resistance if the heating coil.
A. 100 ohms
B. 10 ohms
C. 1000 ohms
D. 1 ohm
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Answer:As you know that
p.d= work done/time
=2000/20
=100v
Explanation:Now,
P.d=100v
Current(I)=1A
Apply ohms law,
V=IR
R=V/I
R=100/1
R=100ohm..........answer
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