Explain the operation of a fuse.

Important Questions on Electrical Circuits

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 4

Explain why fuse is a safety device.

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 4

State the worst case scenario for the house if the fuse is replaced with a metal foil. Explain your answer. 

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 5

Explain the operation of a trip switch.

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 6

State the sequence of events that leads to fuse melting.

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 7

Someone is operating an electric hedge cutter whilst standing on wet grass. The cable is cut by accident. Explain why it is unlikely that a fuse will save the life of the operator.

MEDIUM

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 8

Two $12 \mathrm{V}, 40 \mathrm{W}$ lamps are connected in series and are shining with normal brightness. State what will be seen if one of the lamps is removed and replaced with a $12 \mathrm{V}, 100 \mathrm{W}$ lamp. Explain your answer. 

EASY

Upper Secondary-IGCSE

IMPORTANT

Physics for Cambridge IGCSE workbook>Chapter 19 - Electrical Circuits>Exercise 19.6>Q 9

Draw a circuit that will only allow current to flow clockwise, allowing a user to adjust the light level at which the lamp will turn on.