What voltage gain can be expected from the circuit in Figure E73 when R1 is 10 ohms and RF is 470 ohms?

Explanation

The circuit is an inverting amplifier with the non-inverting input grounded, so the voltage gain is −RF / R1 = −470 Ω / 10 Ω = −47: the output is 47 times the input and opposite in polarity. Unlike E7G10 and E7G11, this question does not ask for the absolute value, so read the official answer 47 as the magnitude of a gain that is genuinely negative.