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True or false: what emf actually is

Exercise and reference answers

Questions
  1. Statement is true
    Yes
    Statement
    Despite its name, emf is not a force.
  2. Statement is true
    Yes
    Statement
    emf is the work done per unit charge by the source.
  3. Statement is true
    No
    Statement
    emf is measured in newtons.
  4. Statement is true
    Yes
    Statement
    In an open circuit the emf equals the voltage across the terminals.
  5. Statement is true
    Yes
    Statement
    A steady current needs a closed circuit.

Explanation

**Your syllabus says it outright:** the emf is NOT a force. It is the work done per unit charge by the source, and equals the terminal voltage in an open circuit. Source: syllabus Physics Part I, Ch 3 Current Electricity.
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