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Praxis II General Science

Category - Physics

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Adam builds a circuit in which there are three resistors in parallel. The first resistor is 3 Ohms, the second is 5 Ohms, and the third is 1 Ohm. What is the equivalent resistance across the entire circuit?

0.56 Ohms
0.97 Ohms
1 Ohm
1.53 Ohms
2.18 Ohms

Explanation

Answer: D - The resistance of resistors in parallel is R = 1/R1 + 1/R2 + 1/R3…. Thus, for this parallel setup, the resistance R = 1/3 + 1/5 + 1/1, or roughly 1.53 Ohms.

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