Navigate

A metal wire of circular cross-section has a resistance R₁. The wire is now stretched

A metal wire of circular cross-section has a resistance R₁. The wire is now stretched without breaking, so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes R₂, then R₂:R₁ is

Options

(a) (1:1)
(b) (1:2)
(c) (4:1)
(d) (1:4)

Correct Answer:

(4:1)

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

WB2015
admin:

Related Questions

  1. Electrons in the atom are held to the nucleus by
  2. A long straight wire of radius a carries a steady current I. The current is uniformly
  3. If a given volume of water in a 220V heater is boiled in 5 min, then same volume
  4. A particle moves along the x-axis from x=0 to x=5 m under the influence of a force
  5. When a mass M is attached to the spring of force constant k,