A) 70 ohms
B) 5 ohms
C) \[2.5\] ohms
D) \[1.4\] ohms
Correct Answer: A
Solution :
If \[200\,\,V\] is supplied to a resistance of \[150\Omega \], current supplied\[=\frac{220}{150}\]. This is greater than the maximum current the heater can withstand. So, resistance of the circuit should be increased Now, \[1=\frac{220}{150+R}\]or \[R=70\Omega \]You need to login to perform this action.
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