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Calculate the equivalent resistance when two resistances are connected in parallel of values 2 Ω, 2 Ω.

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Calculate the equivalent resistance when two resistances are connected in parallel of values 2 Ω, 2 Ω.

(a) 1 Ω

(b) 2 Ω

(c) 4 Ω

(d) 7 Ω

The question was asked in examination.

This question is from Electric Motors in division Braking of Electric Motors of Electric Drives

1 Answer

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Correct option is (a) 1 Ω

The best I can explain: When two resistances are connected in parallel their equivalent resistance is equal to the harmonic mean of the individual resistances. Req=R1.R2÷(R1+R2)=22 Ω.

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