Why I-V curve but not V-I curve

[KathC]

Why we use I-V curve to show the characteristic of an electrical device but not V-I curve? I think the V-I one is clearer as the gradient would be resistance directly...

My teacher said there is a reason to use I-V, but she couldn't remenber.

Anyone knows?...Thx a lot...

 

[verty]

I think it is because it is easy to control the voltage but not easy to control the current. The device responds to the voltage with a current profile. It doesn't respond to current by inducing a voltage.

 

[KathC]

I think it is because it is easy to control the voltage but not easy to control the current. The device responds to the voltage with a current profile. It doesn't respond to current by inducing a voltage.

Thanks! I think you're right...:)