Discussion
The resolution of a 3½ digit DMM on 1 V and 10 V is :
Answer: D
The resolutions are 0.001 V and 0.01 V.
A 3½ digit meter has a maximum count of 1999, so its resolution is one count in the last digit. On the 1 V range the display reads up to 1.999 V, so the smallest step is 0.001 V. On the 10 V range it reads up to 19.99 V, so the smallest step is 0.01 V.
\[ \begin{aligned} \frac{1\ \text{V}}{1000} &= 0.001\ \text{V} \\ \frac{10\ \text{V}}{1000} &= 0.01\ \text{V} \end{aligned} \]
The other options are ten or a hundred times too coarse on one or both ranges.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development