Calculate unloaded and loaded divider voltages, referenced source current and resistor/load dissipation with an interactive circuit.
01 / PURPOSE-SPECIFIC INPUTS
Positive finite resistances are required. Negative supply voltage is permitted; output and source current retain their reference polarity. Dissipation is nonnegative.
02 / RESULT & INTERACTIVE INSPECTION
Ideal DC resistors and a constant supply are assumed; tolerance, source impedance and heating are not modeled. Positive current is referenced from the supply through R1 toward the lower branch; a negative value means the opposite direction. Dissipation is an arithmetic estimate, not a component power-rating recommendation.
R1 1,000 Ω; drop 6 V; referenced current 0.006 A; dissipation 0.036 W.
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R1 is the upper resistor from the supply to the output node; R2 is the lower resistor from the output node to zero-volt ground. The unloaded formula is Vout = Vin×R2/(R1+R2).
Calculate unloaded and loaded divider voltages, referenced source current and resistor/load dissipation with an interactive circuit. Inspect actual calculated quantities with accessible controls and review the worked unit conversions and assumptions.
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R1 is the upper resistor from the supply to the output node; R2 is the lower resistor from the output node to zero-volt ground. The unloaded formula is Vout = Vin×R2/(R1+R2).
With RL across R2, the lower equivalent is R2×RL/(R2+RL). Substitute that equivalent into the divider equation. A 12 V supply with R1=R2=RL=1000 Ω gives equivalent 500 Ω, output 4 V and source current 8 mA.
Unloaded mode uses Req=R2 and never divides by a missing RL. With 12 V and two equal 1000 Ω resistors, the output is 6 V.
Yes. Output voltage and referenced source current retain their sign; positive current is defined toward R1 from the supply. Zero supply gives zero output/current, while ideal resistor dissipation remains nonnegative for either polarity.
R1 power is source current squared times R1. R2 and connected-load power are output voltage squared divided by their respective resistances. Their sum equals Vin times referenced source current in the ideal model, before independent display rounding.
No. It is ideal DC arithmetic without resistor tolerance, source impedance, self-heating or rating derating. Select real components using their datasheets and applicable design requirements; the diagram shows connectivity rather than physical resistance magnitude.