Question

In the circuit shown above, an input of \(1\,V\) is fed into the inverting input of an ideal Op-amp \(A\). The output signal \(V_{\text{out}}\) will be

• A. \(+10V\)
• B. \(-10V\)
• C. \(0V\)
• D. Infinity

Answer 1

The Correct Option is B

Voltage gain, $\frac{V_{O}}{V_{i}}=-\frac{R_{f}}{R_{i}}=-\frac{10}{1}=-10$ or $V_{o}=-10 V_{i}=-10 \times 1=-10$ volt

Answer 2

The simplest definition of an operational amplifier is a linear Integrated Circuit (IC) with numerous terminals. Op-amps are voltage amplifiers that are intended to be utilized with external feedback elements like resistors and capacitors connected between their output and input terminals. It is an electrical voltage amplifier with high gain that typically has a single-ended output and a differential input. Due to their widespread use in a wide range of consumer, industrial, and scientific equipment, op-amps are among the most commonly utilized electronic devices in use today.

Inverting input terminals are denoted by a (-) sign, whereas non-inverting input terminals are denoted by a (+) sign.

The positive and negative terminals of a DC voltage source are linked to the V+ and V- power supply terminals, respectively. The common terminal of the V+ and V- must be linked to a ground or reference point in order to prevent the op-amp from being damaged by double the supply voltage.

An op-amp, also known as differential input voltage, should ideally simply amplify the voltage difference between the two. The equation: gives the op-amp's Vout output voltage.

V_out = A_OL (V₊ – V_–)

where A_OL is the open-loop gain of the amplifier.

The output signal of a linear operational amplifier is the input signal's value multiplied by the amplifier's gain (A), also known as gain.