Current Electricity and Electrical InstrumentHard

Question

Internal resistance of battery is 5ΩTwo identical fuses are rated at 10A. If they are joined

Options

A.In parallel, the combination acts as a fuse of rating 20 A
B.In parallel, the combination acts as a fuse of rating 5 A
C.In series, the combination acts as a fuse of rating 10 A
D.In series, the combination acts as a fuse of rating 20 A

Solution

In parallel combination current gets divided therefore parallel combination supports i = i1         + i2 is 20A in series current remain same therefore the series combination supports i = 10A.

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