A WIRE OF LENGTH L AND AREA OF CROSS SECTION A HAS A RESISTANCE R. IF THE WIRE IS STRACHED TO TWICE OF ITS LENGTH WHILE A REMAINS SAME , WHAT IS THE NEW RESISTANCE????
We know that R = ρl/A
When the wire is stretched, there is no change in volume. So if length is doubled then volume will be halved so that volume is constant.
Therefore, the new resistance R’ = 4R
That is the resistance becomes four times its original value.
1. A WIRE OF LENGTH L AND AREA OF CROSS SECTION A HAS A RESISTANCE R. IF THE WIRE IS STRACHED TO TWICE OF ITS LENGTH WHILE A REMAINS SAME , WHAT IS THE NEW RESISTANCE????
Why do we represent particle by a group of matter waves and not by single de Broglie wave?
A particle moving with constant acceleration describes in the last second of its motion 9/25th of the total.if it starts from rest how long is the particle in motion and through what distance does it move if it describes 6 cm in first sec
(Visitors are requested to post answer as comment to this post)
- Class 11 Physics – Practice Paper for Annual Exam (plustwophysics.com)
- A few questions from Class 11 Physics (askphysics.com)
- language of kinematics (zanzanbar.wordpress.com)