Physics, asked by yashaswisrivastava29, 1 day ago

Ques. 30) A place of Cu wire has a resistance of 3Ω. What will be the resistance of another metal wire of double the length one half diameter. If the specific resistance of constunton in 20 times that of copper?
1. 400Ω
2. 440Ω
3. 480Ω
4. 452Ω

.

Answers

Answered by RKRUHIRK

0

Answer:

Correct option is B)

R=AlDρl2d=mρdl2

R∝l2

R=12Ω (new resistance of wire)

R1=2Ω

R2=10Ω

Req=10+210×2=35Ω.

Previous Question

Next Question

Similar questions

Math, 18 hours ago

Friends please solve it and get brainly.

Physics, 18 hours ago

if five waves are produced in one second, then what is the time period of the wave ...

Math, 18 hours ago

triangle ABC is right angled at b . BD is perpendicular to AC . IF Ab = 3 cm and BC = 4 cm and AC= 5 cm . find the area of triangle ABC . Also find the length of BD...

English, 1 day ago

10 sentences starting from the work' you' the sentence are in simple present tense and the word should be in negative also and alternative also?

Math, 1 day ago

the two interior opposite angle of an exterior angle of a triangle are 20° and 70° . find the measure of the exterior angle...

Math, 8 months ago

1 complete rotation...

Math, 8 months ago

In a morning walk ,three persons step off together their steps measure 24cm, 36cm, and 40cm what is the minimum distance each should walk ,so that all can cover the same distance in complete steps...

Physics, 8 months ago

A Body is moving in a circle of Radius 7 cm calculate the distance and the displacement when It complete one revolution. 15...