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Op Amp as COMPARATOR

In the circuit below, the non-inverting input is connected to "ground", so V+=0.
Use the +7·2v 0 -7·2v rechargeable battery packs made specially for op amp experiments.

Vary the voltage applied to the inverting input (using the variable potential divider) to show that:

and if V- > 0 then  Vo = ____________
and if V- < 0 then   Vo = ____________

Repeat the experiment with the INVERTING input connected to ground and the non-inverting input connected to the variable potential divider. Now we find:

and if V+ > 0 then  Vo = ____________
and if V+ < 0 then   Vo = ____________

 

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