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Concept explainers
a.
To simplify the formula
a.
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Answer to Problem 49PPS
Explanation of Solution
Given:
The amount of current in amperes I that an appliance uses can be calculated using the formula,
where P is the power in watts and R is the resistance in ohms.
Calculation:
Consider the given formula
Conclusion:
Therefore, the simplified form of the formula is
b.
To calculate the current for the given power and resistance.
b.
![Check Mark](/static/check-mark.png)
Answer to Problem 49PPS
3.9 ampere
Explanation of Solution
Given:
The amount of current in amperes I that an appliance uses can be calculated using the formula,
where P is the power in watts and R is the resistance in ohms.
Calculation:
Consider the formula,
Substitute
From, subpart (a),
Conclusion:
Therefore, the appliance uses 3.9 ampere of current if the power used is 75 watts and the resistance is 5 ohms.
Chapter 10 Solutions
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