Two resistors of resistance R 5 = 3.00 ? and R 6 = 3.00 ? are added to the netwo

Question

Two resistors of resistance R5 = 3.00? and R6 = 3.00? are added to the network, and an additional resistor of resistance R7 = 3.00? is connected by a switch, as shown in the diagram..(Figure 2) Find the equivalent resistance RB of the new resistor network when the switch is open. Also, Find the equivalent resistance when the switch is closed.

Two resistors of resistance R5 = 3.00? and R6 = 3.00? are added to the network, and an additional resistor of resistance R7 = 3.00? is connected by a switch, as shown in the diagram..(Figure 2) Find the equivalent resistance RB of the new resistor network when the switch is open. Also, Find the equivalent resistance when the switch is closed.

Explanation / Answer

If switch is open, R7 is not in the circuit.

Ra = R1 s R6 (s - series - add them)

Rb = Ra || R2 (|| - parallel - reciprocal rule or product / sum).

RT = Rb s R3 s R4 s R5

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