A fuse in a circuit is a
Correct answer: B. thin wire of low melting point placed in series with the appliance
- A. thick wire of low melting point placed in parallel with the appliance
- B. thin wire of low melting point placed in series with the appliance
- C. high resistance placed in parallel with the supply
- D. device that raises the current to a safe value
Explanation
Being in series, the whole current passes through it, and being thin with a low melting point it melts and breaks the circuit if that current exceeds the rated value. It must be fitted in the live wire so that the appliance is isolated from the supply when it blows. A fuse in parallel would carry no current and protect nothing.
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About Steady Current
Steady current is the continuous flow of charge at a constant rate through a conductor. The topic covers current, charge, potential difference, resistance, Ohm's law, resistivity and electrical power, along with series and parallel circuits, while distinguishing conventional current direction from electron motion.
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