(b) Current when switch is closed is very high very low zero E/ (r+R) (c) What is the voltage across the open switch? zero E infinity 1. A switch has a variable resistance that is nearly zero when closed and extremely large when open, and it is placed in series with the device it controls. Explain the effect the switch in the figure below has on current when open and when closed. (a) Current when switch is open is very high very low zero E/ (r+R) (b) Current when switch is closed is very high very low E zero E/ (r+R) R ww

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