Analyze the circuit in Figure P19.48.
(a) Express the resistors in parallel as a single equivalent resistor. What is the value of this resistor?
(b) Combine this equivalent resistor with R₁ to get the total equivalent resistance of the circuit. What is the value of this resistor?
(c) The circuit is now “reduced” to a battery in series with a single equivalent resistance. Use your result from part (b) to fi nd the current through the battery and resistor R₁.

R₁ = 2400 V, R₂ = 1400 V, R₃ = 4500 Ω, and R₄ = 6000 Ω, and the battery emfs are ε₁ = 5 1.5 V and ε₂ = 5 3.0 V, unless stated otherwise