Electricity: Electric Circuits
Electric Circuits: Audio Guided Solution
Problem 33:
A 9.00-volt battery is used to power a parallel circuit with a 2.50 Ω and a 3.50 Ω resistor. Determine the power rating of each resistor and the total power of the circuit.
Audio Guided Solution
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Power of 2.5 Ω resistor: 32.4 W
Power of 3.5 Ω resistor: 23.1 W
Power of entire circuit: 55.5 W
Power of 3.5 Ω resistor: 23.1 W
Power of entire circuit: 55.5 W
Habits of an Effective Problem Solver
- Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
- Identify the known and unknown quantities and record them in an organized manner. Equate given values to the symbols used to represent the corresponding quantity - e.g., ΔV = 9.0 V; R = 0.025 Ω; I = ???.
- Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
- Identify the appropriate formula(s) to use.
- Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.
Read About It!
Get more information on the topic of Electric Circuits at The Physics Classroom Tutorial.
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