The fuses used in electrical plugs in the UK come in 2 main sizes - 3 A and 13 A What is the purpose if the fuse in the plug connected to an appliance? What energy change does a fuse depend on to work correctly? Copy and complete the table below and select which of the above fuses would be most suitable for each of the appliances. Power Voltage Appliance Current (A) Most suitable fuse (W) (V) Food Mixer 230 0.3 Lamp 100 230 Heater 2.5 x 103 230 Hi-fi unit 230 1.5 i. 2 V ii. 6 V iii. -1.5 V Numerical Answers a. AC b. AC c. AC Electric Charge and Current a. 10 V b. 0.4 V - c. 150 mV – AC 210 C 50 Hz 900 C a. DC 0.3 A b. Decreased 6 A 17 V 5 s B electrical -> heat - – a. 240 C 7.3 A a. 144000C Resistance b. 20 hours a. 550 Ω Potential Difference b. 1.5 kΩ c. 16.8 Ω – a. 8.2 kΩ – b. 164 Ω – c. 2 Ω – a. 1 kΩ i. DC b. 716 Ω ii. AC c. 1.2 MΩ iii. DC
The fuses used in electrical plugs in the UK come in 2 main sizes - 3 A and 13 A What is the purpose if the fuse in the plug connected to an appliance? What energy change does a fuse depend on to work correctly? Copy and complete the table below and select which of the above fuses would be most suitable for each of the appliances. Appliance Power (W) Voltage (V) Current (A) Most suitable fuse Food Mixer 230 0.3 Lamp 100 230 Heater 2.5 x 103 230 Hi-fi unit 230 1.5 Numerical Answers Electric Charge and Current - – 210 C 900 C 0.3 A 6 A 5 s electrical -> heat – a. 240 C 7.3 A a. 144000C b. 20 hours Potential Difference – – – – i. DC ii. AC iii. DC i. 2 V ii. 6 V iii. -1.5 V a. AC b. AC c. AC a. 10 V b. 0.4 V c. 150 mV AC 50 Hz a. DC b. Decreased 17 V B - Resistance a. 550 Ω b. 1.5 kΩ c. 16.8 Ω a. 8.2 kΩ b. 164 Ω c. 2 Ω a. 1 kΩ b. 716 Ω c. 1.2 MΩ
pupil-notes-Watsons.docx