everyday science MCQ #49848

For a parallel circuit with resistors R1 and R2, the total resistance is calculated as:

everyday science MCQ #49848

  1. Question 1

    Q1. For a parallel circuit with resistors R1 and R2, the total resistance is calculated as:

    • A) R = R1 + R2
    • B) R = (R1 × R2) / (R1 + R2)
    • C) R = (R1 + R2) / (R1 × R2)
    • D) R = R1 - R2

    Answer: R = (R1 × R2) / (R1 + R2)

    Explanation: For two resistors in parallel, the reciprocal of the total resistance equals the sum of reciprocals: 1/R = 1/R₁ + 1/R₂; rearranging gives R = (R₁ × R₂)/(R₁ + R₂), always less than the smaller of the two resistances.