Concept explainers
(a)
The current drawn by the night light.
(a)
Answer to Problem 56A
The current drawn by the night light bulb is
Explanation of Solution
Given info:
Power of the night light bulb,
Supply voltage for the night light bulb,
Formula Used:
Write the expression to calculate the current drawn by the night light bulb.
Calculation:
Substitute given values in the above expression.
Conclusion:
The current drawn by the night light bulb is
(b)
The resistance of the nightlight filament.
(b)
Answer to Problem 56A
The resistance of the night light bulb is
Explanation of Solution
Given info:
Current drawn by the night light bulb is
Supply voltage for the night light bulb is,
Formula Used:
Write the expression to calculate the resistance of the filament.
Calculation:
Substitute given values in the above expression.
Conclusion:
The resistance of the night light bulb is
(c)
The energy uses by the night light in one month.
(c)
Answer to Problem 56A
The energy used by the night light in one month is
Explanation of Solution
Given info:
Power of the night light bulb,
Number of days,
Formula Used:
Write the expression to calculate the energy used by the night light.
Calculation:
Substitute values in the above expression.
Conclusion:
The energy used by the night light in one month is
(d)
The cost of operation for the month.
(d)
Answer to Problem 56A
The cost of operation of night light in a month is
Explanation of Solution
Given info:
Utility rate of the electricity,
Formula Used:
Write the expression to calculate the cost of operation.
Calculation:
Substitute values in the above expression.
Conclusion:
The cost of operation of night light in a month is
Chapter 35 Solutions
Conceptual Physics: The High School Physics Program
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