Navigate

A wire having resistance 12Ω is bent in the form of an equilateral triangle.

A wire having resistance 12Ω is bent in the form of an equilateral triangle. The effective resistance between any two corners of the triangle will be

Options

(a) 6Ω
(b) 8/3Ω
(c) 9Ω
(d) 12Ω

Correct Answer:

8/3Ω

Explanation:

As resistance, R ∝ length

.·. Resistance of each arm = 12 / 3 = 4 Ω

So, effective resistance between any two corners,

Reff = (4×8) / (4+8) = 32 / 12 = (8/3) Ω

BCE2012
admin:

Related Questions

  1. A soap bubble is charged to a potential 12V. If its radius is doubled,
  2. An electron moves on a straight line path XY as shown. The abcd is a coil adjacent
  3. Certain quantity of water cools from 70⁰ C to 60⁰C in the first 5 minutes and to 54⁰C
  4. A ball is projected upwards from the foot of a tower. The ball crosses the top
  5. A fluid is in streamline flow across a horizontal pipe of variable area of cross section