Parallel Circuits Online Test – Multiple Choice Questions and Answers 1. If two parallel-connected resistors dissipate 6 watts and 10 watts of power, then what is the total power loss? 4 watts 16 watts 3.75 watts 60 watts 2. The voltage across any branch of a parallel circuit: is dropped in proportion to each branch resistance varies as the total current varies is inversely proportional to total circuit resistance is equally applied to all branch conductances 3. Kirchhoff’s current law for parallel circuits states that the: sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction sum of all branch voltages equals zero sum of currents into a junction is equal to the difference of all the branch currents total circuit resistance is less than the smallest branch resistor 4. A parallel circuit differs from a series circuit in that a parallel circuit has one path for current flow fewer paths for current flow no path for current flow more than one path for current flow 5. Components that connect in parallel form: open circuits short circuits branches a voltage divider 6. What happens to total resistance in a circuit with parallel resistors if one of them opens? It decreases It halves It increases It remains the same 7. What procedure should be followed when troubleshooting with an ammeter or voltmeter? Short the leads and adjust Start with the highest scale and adjust down to a lower scale Check the meter’s external power supply Start with the lowest scale and adjust up to a higher scale 8. When parallel resistors are of three different values, which has the greatest power loss? The smallest resistance Voltage and resistance values are needed The largest resistance They have the same power loss 9. What is the product-over-sum result of 150 and 6800? 146.7 0.006 4800 150 10. Which is considered to be the common reference for a parallel circuit? Resistance Power Current Voltage Loading … Question 1 of 10
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