(a) Derive an expression for the equivalent
resistance of three resistors R1, R2, and R3
connected in parallel.
(b) Fuses of 3A, 5A and 10A are available.
Calculate and select the fuse for operating an
electric iron of 1 kW power at 220 V.
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Answer:
total current =i1+i2+i3..............1
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