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Question

Electric bulbs are connected in a 240 V supply line are shown in the figure.
a. What is the total wattage of appliances used in the circuit?
b. Calculate the amperage of the fuse to be used in the circuit.
1851770_4521feade55b4103b1c4bdebd4e5f280.png


Solution

According to the data given in the question,

a. $$P= 20 \ W + 20 \ W + 20 \ W= 60 \ W$$

b. $$Amperage= \dfrac{Wattage}{Voltage}= \dfrac{60 \ W}{240 \ V}= \dfrac14 \ A$$

Physics

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