Question

Primary way to control open loop gain?

Using input resistors

Positive feedback

Apply negative feedback

Ground one input

One type of internal op amp failure

Constant high input

Constant low output

Either a or b

None of the above

A summing amplifier

Algebracally adds the diffrence between two inputs

Algebraically adds two inputs

Algebraically adds any bumber of inputs

None of the above

With negative feedback

Input voltage easily deive an op amp into no linear operation

Gain is nearly 200,000

An op amp is too sensitive to input voltages

All if the above

Answer 1

1. Answer is Apply negative feed back becuase controlling of open loop can only be done by providing feedback of negative type to it that reduces its gain and make it more stable to control it.

2. I have not clear concept about it but it should be either a or b.

3. Answer is algebraically adds any number of inputs becuase it can be done by connecting many inputs to op amp through a resistor which results in addition of those inputs at output.

4. Answer is gain is nearly 200,000 because when op amp open loop gain is so high such as 100,000,000 which can be easily reduced to more convenient finite gain thorugh negaative feedback. In negative feedback op amp go into linear operation not non linear operation and its becomes less sensitive to input voltages.