Join now for JEE/NEET and also prepare for Boards Learn Science & Maths Concepts for JEE, NEET, CBSE @ Rs. 99! Register Now
Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
I will answer the question considering the following 2 cases :-
1. The length of the weir is doubles but the cross sectional are of the wire is not changes ( 2 wires of same crooks sectional area and made up of the same material are connected end to end and the same potential difference is applied) - In this case the resistance of the wire increases 2 times. Since drift velocity of electrons is inversely proportional to the resistance of the wire, it becomes one half.
I = N×E×A×V
I=current
N= no. Density of electrons
A= area of cross section of the wire
V= drift velocity.
I is inversely proportional to R and thus V is also inversely proportional to R.
2. The length of the wire is doubled and thus cross section of the wire gets halved - In this case the resistance of the wire increases by 4 times and thus drift velocity becomes one fourth.
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !