Physics JAMB

A conductor has a diameter of 1.00 mm and length 2.00m. if the resistance of the material is 0.1Ω, its resistivity is?
A conductor has a diameter of 1.00 mm and length 2.00m. if the resistance of the material is 0.1Ω, its resistivity is?A conductor has a diameter of 1.00 mm and length 2.00m. if the resistance of the material is 0.1Ω, its resistivity is?

A. 2.55 x 105 Ωm
B. 2.55 x 102 Ωm
C. 3.93 x 10-6 Ωm
D. 3.93 x 10-8 Ωm

Correct Answer:

Option D – 3.93 x 10-8 Ωm

Explanation

R = (1)/a, P = (R.a)/1 = (0.1 x 3.14)/2 (10-3/2)3
∴ P = (0.1 x 3.14 x 10-6)/2 x 4
= 0.3925 x 10-7 OR -3.930 X 10-8 Ωm
Sunday

Share
Published by
Sunday
Tags: physics
4 years ago

Recent Posts

STB 412 Theory Questions: Senescence in Plants: Definition, Causes, and Benefits

400 Level  Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in…

18 mins ago

STB 412 Theory Questions: Comparative Analysis of Plant Growth Measurement Methods – Distinguishing Ipomoea batatas from Dioscorea alata

400 Level  Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in…

46 mins ago

STB 412 Theory Questions: Seed Dormancy: Causes and Breaking Mechanisms

400 Level  Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in…

1 hour ago

STB 412 Theory Questions: Transpiration as a Necessary Evil in Plants: An Explanation

400 Level  Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in…

1 hour ago

STB 412 Theory Questions: Water Distribution and Functions in Plant Cells

400 Level  Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in…

1 hour ago

STB 411 Theory Questions: Vivaria, Biological Gardens, Greenhouses, and Animal Housing Requirements

400 Level  Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in…

5 hours ago