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.

Related Questions
Q257:What can be the cause of excessive heat or burning contacts in an operating moto... Q125:When power is restored after a complete power failure, how will the steering gea... Q25:What effect will increasing the power source frequency have in a capacitive circ... Q480:On a vessel with turbo-electric drive, which of the following conditions would i... Q246:There are very specific rules that govern the testing of generators found in the...

Ready to test your knowledge?

Take a Electricity & Electronics - Assistant Engineer Practice Exam
Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
← Previous All Questions Next →

Pass Your Coast Guard Licensing Exams!

Study offline, track your progress, and simulate real exams with the Coast Guard Exams app

Download on App Store Get it on Google Play Download for Mac