When we apply input at the non-inverting input of an operational amplifier then the output appears after:

Explanation

An amplifier's non-inverting input refers to the pin configuration. The non-inverting input is the terminal marked with a plus (+) sign, and the inverting input is marked with a minus (-) sign. These can also be referred to as positive and negative terminals. Non-inverting amplifier work on these rules: The Current Rule: No current flows into the inputs of the op-amp (I+=I-=0). The Voltage Rule: The output of the op-amp attempts to ensure that the voltage difference between the two inputs is zero (V+=V-). Non-inverting op-amp circuit. Consider the non-inverting op amp circuit shown above. According to the Voltage Rule, the voltage at the inverting (-) input will be the same as at the non-inverting (+) input, which is the applied voltage, Vin. The current going through R1 can then be given as Vin/R1. According to the Current Rule, the inputs draw no current, so all that current must then flow through R2. The output voltage can then be given as Vout=Vin+(Vin/R1)R2. The gain is then Vout/Vin=1+(R2/R1). The gain will never be less than 1, so the non-inverting op-amp will produce an amplified signal that is in phase with the input. A non-inverting op amp is an operational amplifier circuit with an output voltage that is in phase with the input voltage. Its complement is the inverting op amp, Hence Output is in phase with input and is amplified.