Question

A rectangular carbon block has dimensions 1 cm ×1cm×50cm.What is the resistance measured between the two square ends?​

Answer 1

Answer:

0.175

Explanation:

Given A rectangular carbon block has dimensions 1 cm ×1 cm×50 cm.What is the resistance measured between the two square ends?

Given A = 1 cm x 1 cm = 0.01 x 0.01 = 0.0001 sq m = 10^-4, l = 50 cm = 0.5 m

Resistivity of carbon at 20 degree C is 3.5 x 10^-5 ohm-m

We know that

R = ρl / A

  = 3.5 x 10^-5 x 0.5/ 10^-4

 = 3.5 x 0.5 / 10

R = 0.175 ohm

the resistance measured between the two square ends is o.175 Ω

Answer 2

Answer:

imensions 1 cm ×1cm×50cm.What is the resistance measured between the two square ends?