An automobile gasoline gauge is shown schematically in Figure. The indicator (on the dashboard) has a resistance of 10?. The tank unit is a float connected to a variable resistor whose resistance varies linearly with the volume of gasoline. The resistance is 140? when the tank is empty and 20? when the tank is full. Find the current in the circuit when the tank is?

(a) Empty,

(b) Half-full, and

(c) Full treat the battery as ideal.

Transcribed Image Text:

Rudicator Indicator Tank unit 12 V Connected Rank through chassis