passwella.
Menu

JAMB Physics 1994 Question 42

Question 42

Current Electricity

In the figure above, XY is of length 1m. The value of R at balance point Z is

Diagram for this question
  1. A.3.0Ω
  2. B.13.3Ω
  3. C.15.0Ω
  4. D.30.0Ω
Show the answer and explanation

Answer: D (30.0Ω)

Explanation

At balance R/20 = 60/40, so R = 20 × 1.5 = 30.0 Ω.