Wagner earthing device is used to eliminate errors due to________________?
Correct answer: A. electrostatic coupling
- A. electrostatic coupling
- B. electromagnetic coupling
- C. both A. and B.
- D. none of the above
Explanation
A Wagner earthing device removes errors caused by electrostatic coupling or stray capacitance between bridge components and earth. Magnetic or electromagnetic coupling requires magnetic shielding instead.
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