What is the equivalent resistance of three resistors of values 2Ω, 3Ω, and 5Ω co

Practice Questions

Q1
What is the equivalent resistance of three resistors of values 2Ω, 3Ω, and 5Ω connected in parallel?
  1. 0.83Ω
  2. 10Ω

Questions & Step-by-Step Solutions

What is the equivalent resistance of three resistors of values 2Ω, 3Ω, and 5Ω connected in parallel?
Correct Answer: 1.2Ω
  • Step 1: Identify the values of the resistors. We have R1 = 2Ω, R2 = 3Ω, and R3 = 5Ω.
  • Step 2: Write the formula for equivalent resistance in parallel: 1/R_eq = 1/R1 + 1/R2 + 1/R3.
  • Step 3: Substitute the values into the formula: 1/R_eq = 1/2 + 1/3 + 1/5.
  • Step 4: Calculate each term: 1/2 = 0.5, 1/3 ≈ 0.3333, and 1/5 = 0.2.
  • Step 5: Add the values together: 0.5 + 0.3333 + 0.2 = 1.0333.
  • Step 6: Take the reciprocal to find R_eq: R_eq = 1 / 1.0333 ≈ 0.967Ω.
  • Step 7: Round the answer to two decimal places if needed: R_eq ≈ 0.97Ω.
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