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The two resistances are connected in series and the resultant is connected in parallel with the third resistance. The equivalent resistance is:

1. 8 Ω
2. 4 Ω
3. 6 Ω
4. 10 Ω

Correct answer: 4 Ω

Solution

When two resistances are connected in series, their equivalent resistance is the sum of the two. This resultant resistance is then connected in parallel with the third resistance, and the equivalent resistance is calculated using the formula for parallel combination. The given data suggests the equivalent resistance is 4 Ω.

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