In the circuit diagrams above, we have two resistors of resistances r_1, . and R

Question

In the circuit diagrams above, we have two resistors of resistances r_1, . and R_2 along with an emf (it could be a battery). The circuit above contains a switch. In case A the switch is opened, and in case B the switch is closed. Which of the following statements about the current in the above circuit i is true? Assume the resistance in the connecting wires is negligible compared to the resistance in the resistors. Case A: i = emf/r_2 Case B: i = 3. Case A: i =emf/r^2 + r_1 Case B: i = 0 Case A: i = 0. Case B: i = 0 Case A; emf/r^2 +r_1 case = emf/r_1

Explanation / Answer

4. Case A i= emf/R1+R2 Case B i = emf/R1

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