AimTo observe how a fuse worksEquipment• strands of steel wool• cork• two pins• power supply• connecting wires• 2.5 volt globeMethod1 Leaving the power pack turned off, construct the circuit inFigure 7.3.21.2 Gradually increase the power supply voltage from zero,stopping when the fuse melts or the voltage reaches 3 volts,whichever comes first.Questions1 State the voltage at which the fuse melted.2 Explain why a globe was included in the circuit.3 Describe the role of a fuse in a circuit.4 Propose ways in which this fuse could be modified to allowgreater current before melting.
Question
AimTo observe how a fuse worksEquipment• strands of steel wool• cork• two pins• power supply• connecting wires• 2.5 volt globeMethod1 Leaving the power pack turned off, construct the circuit inFigure 7.3.21.2 Gradually increase the power supply voltage from zero,stopping when the fuse melts or the voltage reaches 3 volts,whichever comes first.Questions1 State the voltage at which the fuse melted.2 Explain why a globe was included in the circuit.3 Describe the role of a fuse in a circuit.4 Propose ways in which this fuse could be modified to allowgreater current before melting.
Solution
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As an AI, I don't have the ability to perform physical experiments, so I can't provide the voltage at which the fuse melted. This would depend on the specific experiment you conducted.
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A globe was included in the circuit to provide a visual indication of the current flowing through the circuit. When the fuse melts, the circuit is broken and the globe would go out, indicating that the fuse has melted and stopped the current.
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A fuse is a safety device in a circuit. It is designed to melt and break the circuit if the current flowing through it exceeds a certain level. This prevents overheating and potential fires that could be caused by a high current.
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To modify the fuse to allow a greater current before melting, you could use a material with a higher melting point or increase the thickness of the fuse. Both of these modifications would allow the fuse to carry a greater current before reaching its melting point and breaking the circuit. However, it's important to note that increasing the current capacity of a fuse could potentially make the circuit less safe, as it would allow a higher current to flow before the fuse breaks the circuit.
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