Register

A wire of 3Ω resistance and 15 cm length is stretched to 45 cm length. Calculate the new cross sectional area.

A wire of 3Ω resistance and 15 cm length is stretched to 45 cm length. Calculate the new cross sectional area.
asked 179k views
0 votes
A wire of 3Ω resistance and 15 cm length is stretched to 45 cm length. Calculate the new cross sectional area.

asked
User Punit Patel
by
8.5k points

1 Answer

4 votes
R = rho *(L/A)

as rho is fixed , so
for fixed resistance, L is inversely propostional to A

so, new cross sectional area will be 1/3 time of actual one..


hope it helped
answered
User Madepiet
by
8.1k points
← Prev Question Next Question →

Related questions

User Sound Wave
asked Mar 13, 2021 90.2k views
If a wire has 23.6 A of current and a resistance of 33.3Ω how much voltage is present?
Sound Wave asked Mar 13, 2021
by Sound Wave
7.4k points
1 answer
1 vote
90.2k views
Ask a Question
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.

Categories

Other Questions

Physical properties of minerals graphic organizer
A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how high (in m) was the building?
What type of rock is the Haystack rock (igneous, Metamorphic, or Sedimentary)
Link Copied!