(a)
Setting of a higher resistance.
(a)
Answer to Problem 31P
The answer is
Explanation of Solution
Given:
A
Formula used:
Expression for the power in terms of resistance and voltage:
Where,
Calculation:
The resistance is inversely proportional to the power, a higher power setting to a lower resistance. According to this, resistance will be higher at
Conclusion:
Setting of a higher resistance:
(b)
Resistance at the lower setting.
(b)
Answer to Problem 31P
The answer is
Explanation of Solution
Given:
A
Formula used:
Expression for the power in terms of resistance and voltage:
Where,
Calculation:
The resistance is inversely proportional to the power, a higher power setting to a lower resistance. According to this, resistance will be higher at
Rearrange the expression,
Therefore, a new expression,
To calculate resistance, substitute the given values in the formula,
Conclusion:
Resistance at the lower setting:
(c)
Resistance at the higher setting.
(c)
Answer to Problem 31P
The answer is
Explanation of Solution
Given:
A
Formula used:
Expression for the power in terms of resistance and voltage:
Where,
Calculation:
The resistance is inversely proportional to the power, a higher power setting to a lower resistance. So, the lower power setting
Rearrange the expression,
Therefore, a new expression,
To calculate resistance, substitute the given values in the formula,
Conclusion:
Resistance at the higher setting:
Chapter 18 Solutions
Physics: Principles with Applications
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