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Loading Effect MCQs

Practice Loading Effect MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Measurements & InstrumentationLoading Effect

An ideal ammeter should have internal resistance of?

  • AZero
  • BInfinite
  • C1 kohm
  • DEqual to load resistance
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Correct Answer: A. Zero
Explanation: An ammeter is connected in series, so ideally its resistance is zero to avoid altering circuit current.
Reference: Standard measurements and instrumentation: loading effect
Question 2
Measurements & InstrumentationLoading Effect

An ideal voltmeter should have internal resistance of?

  • AZero
  • BInfinite
  • CEqual to source resistance
  • DOne ohm
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Correct Answer: B. Infinite
Explanation: A voltmeter is connected in parallel and ideally draws no current, requiring infinite input resistance.
Reference: Standard measurements and instrumentation: loading effect
Question 3
Measurements & InstrumentationLoading Effect

A voltmeter with finite input resistance connected across a circuit can cause?

  • ALoading error
  • BZero frequency
  • CInfinite source voltage
  • DNo effect under any condition
Report an error
Correct Answer: A. Loading error
Explanation: The voltmeter draws current and changes the effective circuit resistance, potentially altering the voltage being measured.
Reference: Standard measurements and instrumentation: loading effect