Question

With zero volts on both inputs, an OP-amp ideally should have an output ..

• A. equal to the positive supply voltage
• B. equal to the negative supply voltage
• C. equal to zero
• D. equal to infinity

Answer 1

The correct option is C equal to zero

Output voltage of an ideal Op-amp $=V_o=A{V}_d$

Where,

$A\to$Open loop gain of op-amp.

And,$V_d\to$ Difference input voltage.

$V-d=V_1-V_c$

Given, that zero volt is applied on both input

so, $V_1=0$ and $V_2=0$

$\therefore V_d=0-0=0$

$\therefore$ Output Voltage $V_o=A.V_d=A\left(0\right)$

$\Rightarrow V_o=0$

Therefore with zero volts on both inputs an op-amp ideally should have an output equal to zero.