Question

A \(4\frac{1}{2}\) digit voltmeter is used for voltage measurement. How would 0.7525 V be displayed in 1 V range?
1. 0.7525 V
2. 0.752 V
3. 0.075 V
4. 0.0752 V

Answer 1

Correct Answer - Option 1 : 0.7525 V

Concept:

For \(N\frac{1}{m}\) DVM,

Total number of full digits are N and each digit can be varie from 0 to 9

The extra digit 1/m can be varied from 0 to (m-1)

Resolution \( = \frac{{{V_{FSD}}}}{{{{10}^N}}}\)

Calculation:

For the given question

Number of full digits displayed = 4

Resolution = 1/10000 = 0.0001

Therefore the DVM (for 1 V range) will display the digit number with 4 decimal places

Display: 0.7525