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Q.

Find the effective resistance, when 2Ω, 4Ω and 6Ω resistances are connected in series.

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a

5Ω

b

15Ω

c

10Ω

d

12Ω

answer is C.

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Detailed Solution

When resistors are connected in series, the effective resistance is given by,

Reff = R1 + R2 + R3

Þ Reff = 2 + 4 + 6 =12Ω

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