Single correct option
A fuse wire used in household circuits should have
- A. high melting point and be connected in parallel
- B. low melting point and be connected in series with the appliance
- C. high resistance and be connected in parallel
- D. low melting point and be connected in parallel
Show answer and solution
Answer: (B) low melting point and be connected in series with the appliance
A fuse protects a circuit from overload and short circuit by melting and breaking the circuit when excess current flows. It must therefore have a low melting point and be placed in series so that the whole current passes through it. A parallel connection would not interrupt the current to the appliance.
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