To choose: The correct option.
Answer to Problem 3STP
The correct option is (C), 2.3 W.
Explanation of Solution
Given:
A flashlight with a current of 0.5 A flowing through it and the voltage is the sum of the voltages of the individual batteries, each of voltage 1.5 V.
Formula used:
The power delivered to the bulb of the flashlight is a function of current flowing through it, I and voltage drop across it, V ,which can be expressed as,
Calculation:
In the given flashlight shown in Figure 1, the cells are arranged in series such that, the voltages add up.
Thus, the total voltage of the flashlight is,
Substituting the voltage and current value, the power can be obtained as,
Conclusion:
Therefore, the correct option representing the power delivered to the bulb in the flashlight is (C), 2.3 W.
Chapter 22 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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