Often, the current taken by a load varies, and the voltage across the load must

Question

Often, the current taken by a load varies, and the voltage across the load must remain within specified limits as the current changes. In figure 2, the load absorbs power and requires a current varying between 0 and 25 mA The voltage across the load must remain between 4.5 and 5.0 V. What does it mean when 0 A goes through a resistor? Is the potential maximized or minimized when this occurs? Determine the resistance range of the load resistor given the voltage and current requirements across the load. Determine a suitable voltage divider for R_1 and R_2 to ensure the load voltage meets the specifications.

Explanation / Answer

the potential will be maximised when 0A flows through the resistor

(a) the resitance range will be in between 200ohms-infinity

(b) Vout = Vin (R2 // RL) /(R1+R2 // RL)

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