0

Guest

Courses New

how does internal resistance vary with temperature and area of crossection

how does internal resistance vary with temperature and area  of crossection

Grade:12th pass

1 Answers

Karthik Kumar
100 Points
8 years ago
we know that Resistance(R)=resistivity*(l/a)
where l =length of the resistor
a=area of cross section
 R is inversely propotiona to cross sectional area
as area of cross section increases resistance decreases
if decreases then resistances increases.
and also when temperature increases 
metals  resistance increases because they have positive temperature coefficient.
semiconductors resistance decreases when temperaure increase because they have negaive temperature coefficient

Think You Can Provide A Better Answer ?

Other Related Questions on Electric Current

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More