What is the maximum input voltage that has to be selected to calibrate a dc voltmeter with a full scale voltage range of 1-13v.
(a) ≤ ±14v
(b) ≥ ±13v
(c) ≤ ±15v
(d) = ±14v
I had been asked this question in an international level competition.
This intriguing question comes from Voltage to Current Converter with Floating and Grounded Load topic in portion Operational Amplifier Applications of Linear Integrated Circuits