Question

A $3\frac{1}{2}$ digit digital voltmeter has an internal reference of 200 mV. It's full scale count and resolution are

• A. 2000 and 1 mV
• B. 4000 and 0.1 mV
• C. 2000 and 0.1 mV
• D. 4000 and 1 mV

Answer 1

The correct option is C 2000 and 0.1 mV

Count range for $3\frac{1}{2}$ digit DVM is from 0 to 1999

i.e. 2000 counts.

$andResolution=\frac{200mV}{2000}=0.1mV$