Concept explainers
(a)
The current through the heater when it is operating.
(a)
Answer to Problem 30P
The answer is
Explanation of Solution
Given:
Voltage,
Power,
Formula used:
Expression for the power in terms of current and voltage:
Where,
Calculation:
Rearrange the expression,
Therefore, a new expression,
Substitute the given values in the formula,
Conclusion:
The current through the heater when it is operating is
(b)
The resistance through the heater when it is operating.
(b)
Answer to Problem 30P
The answer is
Explanation of Solution
Given:
Voltage,
Power,
Formula used:
Expression for the power in terms of resistance and voltage:
Where,
Calculation:
Rearrange the expression,
Therefore, a new expression,
To calculate resistance, substitute the given values in the formula,
Conclusion:
The resistance through the heater when it is operating:
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