current source vs voltage source-Difference between current source and voltage source

This page on current source vs voltage source describes basic difference between current source vs voltage source.

Current Source

Figure-1 depicts ideal current source and practical current source.

current source

Ideal Current Source: Current always remains constant for any value of voltage across it.

Ideal Current Source: It has large value of internal resistance. Current varies with respect to the voltage across the element.

Voltage Source

Figure-2 depicts ideal voltage source and practical voltage source.

voltage source

Ideal Voltage Source: Voltage always remains constant for any value of current passing through it.

Practical Voltage Source: It has small internal resistance. Voltage across the element varies with respect to the current.

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