Electrical Circuits

Step 1: Analyze the given OPAMP circuit.
The circuit consists of three operational amplifiers, each with resistors . The configuration is likely to be a non-inverting amplifier, which has the voltage gain given by: The output voltage is related to the input voltage by: where .
Step 2: Determine the values of and .
Given that the resistances in the circuit are all equal ( and ), we can calculate the voltage gain:
Step 3: Calculate the output voltage.
Substitute the value of and into the equation for : The amplitude of the output voltage is 200 V.

Step 1: Understanding the circuit.
The circuit shown is a precision limiter (clipper) using an operational amplifier and a diode. The non-inverting input of the op-amp is grounded, making the inverting input a virtual ground. The diodes determine the clipping level of the output voltage.
Step 2: Behavior of the circuit for .
When , the diode remains reverse-biased, so the op-amp operates in open-loop condition. Therefore, the output increases linearly and follows: Hence, there is a negative slope in this region.
Step 3: Behavior of the circuit for .
When , the diode becomes forward-biased. The output voltage gets limited to a constant value approximately equal to the diode threshold voltage . Thus, the output stops increasing beyond this point and becomes clipped.
Step 4: Conclusion.
Therefore, the versus characteristic shows a slope change (clipping) occurring at . This matches the graph shown in Option (C).