Electronics-Quantities and Units
Electronics-Quantities and Units
1. Derived units are obtained from various combinations of
- electrical quantities
- fundamental units
- metric prefixes
- international standards
3. Scientific notation is a method
- of expressing a very large number
- of expressing a very small number
- used to make calculations with large and small numbers
- All of the above
4. If you drop a 5 when rounding a number, you are using the
- round-to-even rule
- significant digit rule
- round-off rule
- retained digit rule
5. A measure of the repeatability of a measurement of some quantity is
- error
- precision
- accuracy
- significant
6. Another name for "fundamental units" is
- base units
- atoms
- the metric system
- letter symbols
7. When using the terms "accuracy" and "precision" for measurements
- "precision" implies less measurement error than "accuracy"
- "accuracy" implies less measurement error than "precision"
- "precision" measures the repeatability of a measurement
- both terms mean the same thing
8. The difference between scientific and engineering notation is
- powers of ten representation
- single vs. multiple digits before decimal point
- groupings of multiples of three digits
- All of the above
9. The number 14.8 can also be expressed as
- 1.48 × 10–1
- 1.48 × 100
- 1.48 × 101
- 1.48 × 102
10. The digits in a measured number that are known to be correct are called
- accuracy digits
- significant digits
- error digits
- precision digits