Download DC Theory Level 3 Lesson 5: Power Calculations in Parallel Circuits and more Exams Electrical and Electronics Engineering in PDF only on Docsity! DC Theory Level 3 Lesson 5 complete questions and answers latest update exam The indirect method is used to determine total power in a parallel circuit when that power is determined from the total current, total resistance, and source voltage. - >>>False Note: The direct method is used to determine total power in a parallel circuit when that power is determined from the total current, total resistance, and source voltage. The indirect method is used to determine total power in a parallel circuit from the sum of the individual power consumptions of the loads in the circuit. - >>>True Indicate the correct formula for determining the total power consumption of the circuit directly, when you know E (volts) and I (amps). - >>>D. P(T) = E(T) x I(T) Indicate the correct formula for determining the total power consumption of the circuit directly, when you know I (amps) and R (ohms). - >>>D. P(T) = I(T)^2 x R(T) Indicate the correct formula for determining the total power consumption of the circuit directly, when you know E (volts) and R (ohms). - >>>D. P(T) = E(T)^2/R(T) How much power would be consumed in a parallel circuit that has a source voltage of 300 volts and a total circuit current of 4.2 amps? - >>>1260 Watts Three lamps, with wattages of 100 watts, 250 watts and 60 watts, are connected on a circuit. What is the total power consumed by the circuit when all lamps are operating at the rated voltage? - >>>410 Watts Two heaters are connected on the same 120-volt circuit. If the heaters draw 5 amps of current each, how much total power is delivered to the heaters? - >>>1200 Watts Which formula will not be required to calculate the total circuit power in the circuit using the indirect method? - >>>D. P(T) = E(T)^2 x I(T) Which formulas could be used to find the power using the direct method for this circuit? - >>>D. All of the Above A circuit contains nine 250-watt lamps connected in parallel across a 120-volt circuit. How much power is consumed by the circuit? - >>>2250 Watts How many 60-watt lamps could be connected in parallel on a 15-amp, 120-volt circuit without exceeding 80% of the rating of the circuit? - >>>24 lamps 15A*80%=12A P=E*I # of Lamps= PT/PL Find the power consumed by R3 in the circuit shown. - >>>28 Watts Find the total power that must be delivered by the voltage source in the circuit shown. - >>>681.5 Watts Match the resistor to the correct power value. - >>>R1 = 180 Watts R2 = 120 Watts R3 = 90 Watts Determine the current for I1. (Round the FINAL answer to one decimal place.) - >>>0.6 Amps
