Concept explainers
Electric socks, popular in cold weather, have a 90-ohm heating element that is powered by a 9-volt battery. How much current warms your feet?
To Calculate: The amount of current that warms the feet.
Answer to Problem 35A
Explanation of Solution
Given:
Resistance of the heating element,
Voltage,
Formula Used:
Current can be calculated using Ohm’s law:
Here, V is the voltage and R is the resistance.
Calculations:
Substitute the values and solve:
Conclusion:
Thus, the amount of current that warms the feet is
Chapter 34 Solutions
Conceptual Physics: The High School Physics Program
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