In a Wheatstone bridge, if R1 = 5Ω, R2 = 10Ω, and R3 = 15Ω, what is the value of

Practice Questions

Q1
In a Wheatstone bridge, if R1 = 5Ω, R2 = 10Ω, and R3 = 15Ω, what is the value of R4 for balance?
  1. 7.5Ω
  2. 10Ω
  3. 12.5Ω
  4. 20Ω

Questions & Step-by-Step Solutions

In a Wheatstone bridge, if R1 = 5Ω, R2 = 10Ω, and R3 = 15Ω, what is the value of R4 for balance?
Correct Answer: 30Ω
  • Step 1: Write down the values of the resistors: R1 = 5Ω, R2 = 10Ω, R3 = 15Ω.
  • Step 2: Recall the balance condition for a Wheatstone bridge, which is R1/R2 = R3/R4.
  • Step 3: Rearrange the balance condition to solve for R4: R4 = (R2 * R3) / R1.
  • Step 4: Substitute the values into the equation: R4 = (10 * 15) / 5.
  • Step 5: Calculate the multiplication: 10 * 15 = 150.
  • Step 6: Divide the result by R1: 150 / 5 = 30.
  • Step 7: Conclude that the value of R4 for balance is 30Ω.
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