Practice question

What is the primary function of a fuse in an automotive electrical circuit?

  1. To increase the voltage supplied to a component
  2. To protect the circuit from excessive current by melting and breaking the circuit if the current exceeds a rated limit
  3. To step down the battery voltage to a lower level
  4. To store electrical energy for the headlights

Answer: B — To protect the circuit from excessive current by melting and breaking the circuit if the current exceeds a rated limit

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