# Parallel Circuits – 17

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17. Five 100 Ω resistors are connected in parallel. If one resistor is removed, the total resistance is ________.

(a) 25 Ω
(b) 500 Ω
(c) 100 Ω
(d) 20 Ω

Explanation
Explanation : 1/R = 1/R1 + 1/R2 + 1/R3 + 1/R4 1/R = 1/100 + 1/100 + 100 + 1/100 1/R = 4/100 1/R = 1/25 Therefore R = 25 ohm.
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