shorting a dependent current source

For a voltage-controlled current source, the output current is the input voltage times the transconductance, where the transconductance is 1/R. Does the text mention transconductance?

For a VCIS, with the given input voltage of 1 V and resistance of 1 Ohm, transconductance equals 1 S (Siemen) and the output current will be 1A. This will be true regardless of whether the load (across x and y) is shorted, open, or something in between.

Thus, for this problem, the current source will supply 1A and the load will have 1A passing through it.

If the text is really trying to present a VCIS and it it showing the controlling input voltage and resistor physically connected to a symbol for a current source, that is very confusing as an introduction to the theory of dependent sources. It sounds like something of a cross between a model of a VCIS and an actual VCIS circuit.

Richard

No.

The problem is a sub-part of a bigger problem -- that of finding two port parameters of the given circuit. I have given the reference in another post of mine, should you feel interested in looking it up.

I agree with John's explanation though. It agrees with the application of basic laws when applied to the circuit.

regards,

->HS

Agreed. An ideal current source delivers the current no matter what is potential difference across its two terminals.

->HS