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Q: A galvanometer when connected in a circuit, detects the presence of:
  • A. Current
  • B. Frequency
  • C. Resistance
  • D. Potential difference
Correct Answer: Option A - The galvanometer is the instrument used for detecting the presence of electric current in a circuit. It is an electron handicap system that detects and displays direction and magnitude of the current.
A. The galvanometer is the instrument used for detecting the presence of electric current in a circuit. It is an electron handicap system that detects and displays direction and magnitude of the current.

Explanations:

The galvanometer is the instrument used for detecting the presence of electric current in a circuit. It is an electron handicap system that detects and displays direction and magnitude of the current.