(a)
The resistance when every electrical thing is unplugged.
(a)
Answer to Problem 44P
Explanation of Solution
Given info:
Root mean square Voltage,
Formula used:
It is known that
Calculation:
According to the question, when everything is unplugged the zero current will pass through the home-circuit. Means that
So, by using the formula,
Conclusion: The resistance is
(b)
The resistance when there is a lone
(b)
Answer to Problem 44P
The answer is
Explanation of Solution
Given info:
Root mean square Voltage,
Power of bulb,
Formula used:
It is known that
Calculation:
It is known that when two light bulbs are connected in series then the voltage will be the same for both. The resistance if the wires of the house is negligibledue to the resistance of light bulbs.
Now, the power of the light bulb:
After rearranging this expression,
According to the questions two lightbulbs are connected to the circuit. So, the new expression will be
Now find the net resistance of the house-circuit by putting all the given values:
Conclusion: The resistance is
Chapter 18 Solutions
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