Question 110Electricity & Electronics - Assistant Engineer

70% to pass

If a circuit has resistances of 5, 10, and 20 ohms connected in parallel, what is the combined total resistance of the circuit?

A1.5 ohms
B2.9 ohms
C17.5 ohms
D35.0 ohms
AI Explanation

The correct answer is B) 2.9 ohms. To calculate the combined total resistance of resistors connected in parallel, we use the formula: 1/Rtotal = 1/R1 + 1/R2 + 1/R3 + ... Where R1, R2, and R3 are the individual resistor values. Plugging in the given values of 5 ohms, 10 ohms, and 20 ohms, we get: 1/Rtotal = 1/5 + 1/10 + 1/20 = 0.2 + 0.1 + 0.05 = 0.35 Rtotal = 1/0.35 = 2.9 ohms The other options are incorrect because they do not properly apply the formula for calculating total resistance of resistors in parallel.

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Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
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