Question

Design a circuit that finds the average mark of 5 students if both the inputs and the outputs are in decimal (eg: 100% = 1 V)

Answer 1

To find the average mark of 5 students using a circuit, you can use a summing amplifier circuit. Connect each student's mark input to the non-inverting input of an operational amplifier (op-amp) and connect the output of the op-amp to a display device or another circuit. By summing the inputs through the op-amp and dividing the result by the number of inputs, you can find the average mark.

Step-by-step explanation:

To design a circuit that finds the average mark of 5 students, you can use a summing amplifier circuit. Here's how you can build the circuit:

1. Connect the positive terminal of each student's mark input to the non-inverting input of an operational amplifier (op-amp).
2. Connect the negative terminal of each student's mark input to the inverting input of the op-amp.
3. Connect a resistor from the inverting input to the output of the op-amp.
4. Connect a feedback resistor from the output of the op-amp to the inverting input.
5. Connect the output of the op-amp to a display device or another circuit for further processing.

By summing the inputs through the op-amp and dividing the result by the number of inputs, you can find the average mark of the 5 students. Note that the resistors you choose will depend on the specific requirements of your circuit.