The accuracy and measurement range of electrical instruments have a significant impact on the measurement results. The accuracy of an instrument is the degree to which it measures a quantity accurately. 

The measurement range is the range of values that the instrument can measure. Both of these factors can affect the accuracy of the measurement results.

Accuracy is an important factor in determining the accuracy of the measurement results. If the instrument is not accurate, then the measurement results may be inaccurate. 

For example, if an instrument is not accurate enough to measure a voltage accurately, then the measurement results may be off by a significant amount. This can lead to incorrect readings and inaccurate results.

The measurement range of an instrument is also important. If the instrument has a limited measurement range, then it may not be able to measure certain values accurately. 

For example, if an instrument has a limited range of voltage measurements, then it may not be able to measure higher voltages accurately. This can lead to inaccurate readings and incorrect results.

In addition to accuracy and measurement range, the type of instrument used can also affect the accuracy of the measurement results. Different types of instruments measure different types of values. 

For example, a voltmeter measures voltage, while an ammeter measures current. If the wrong type of instrument is used, then the measurement results may be inaccurate.

Finally, the environment in which the instrument is used can also affect the accuracy of the measurement results. If the instrument is used in an environment with high levels of electromagnetic interference, then the measurement results may be inaccurate. 

This is because the electromagnetic interference can interfere with the instrument’s ability to accurately measure the values.

In conclusion, the accuracy and measurement range of electrical instruments have a significant impact on the accuracy of the measurement results. 

If the instrument is not accurate enough or has a limited measurement range, then the measurement results may be inaccurate. Additionally, the type of instrument used and the environment in which it is used can also affect the accuracy of the measurement results. 

Therefore, it is important to ensure that the instrument is accurate and has a wide enough measurement range to accurately measure the values.