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Dc Theory 4 Lesson 3

Question: The total voltage dropped across a series-parallel circuit equals one-half of the supply voltage.

Answer: False

Question: In a parallel portion of a series-parallel circuit, the voltage across the branches can be found by multiplying the sum of the branch currents by the equivalent resistance of the resistors in the parallel portion.

Answer: True

Question: What is the first step necessary to allow calculation of voltages in a combination circuit containing resistive loads in series and parallel?

Answer: The equivalent resistance of the circuit must be found in order to determine circuit current, which can then be used along with Ohm’s Law to determine voltage drops.

Question: Solve for the voltage which would be measured across R1. The values calculated for this question will be used for additional questions.

Answer: 10 Volts

Question: Given the circuit and parameters shown, solve for the following:

Answer: 10 V

10 V

4 V

6 V

Question: Which loads (actual and equivalent) are connected directly to the source voltage ES?

Answer: A & B

Question: Given the circuit and parameters shown, calculate the following value.

R1,2,4,5,6,7,8 = ? Ω

Answer: 25 Ω

Question: What is the total circuit current? The values calculated for this question will be used for additional questions.

Answer: 3 A

Question: How much current flows through resistor R1? (Round the FINAL answer to one decimal place.) The values calculated for this question will be used for additional questions.

Answer: 2.4 A

Question: How much voltage is dropped across resistor R1? (Round the FINAL answer to one decimal place.) The values calculated for this question will be used for additional questions.

Answer: 21.6 V