Register to reply

How to determine the direction of induced current in a solenoid?

by tlfx1996
Tags: current, determine, direction, induced, solenoid
Share this thread:
tlfx1996
#1
Oct11-13, 08:51 AM
P: 8
I have come across this problem, who to determine the direction of induced current.
It keeps me wondering why the answer that i got is Fleming's right hand rule?
Aren't it should be Right hand grip rule?
Cz the usual and conventional way of inducing electricity in a solenoid is to pass the magnet through the centre of the solenoid.

can Fleming right hand rule works with the index (magnetic field) and middle finger (Direction of induced current) align?
Phys.Org News Partner Physics news on Phys.org
Physicists discuss quantum pigeonhole principle
First in-situ images of void collapse in explosives
The first supercomputer simulations of 'spin?orbit' forces between neutrons and protons in an atomic nucleus
UltrafastPED
#2
Oct11-13, 10:29 AM
Sci Advisor
Thanks
PF Gold
UltrafastPED's Avatar
P: 1,908
By Lenz's law the induced current must oppose the changing flux ... so the current flows so that the solenoids magnetic field opposes the field of the magnet.


If this were not true you could generate more energy than you put into the system - which violates conservation of energy.

I found a nice cartoon here:
https://sites.google.com/site/urbang...ad-of-a-N-pole


Register to reply

Related Discussions
EMF induced in solenoid by current in a loop. Introductory Physics Homework 2
Solenoid with an aluminum ring around it! (induced emf, induced current, mag. field?) Introductory Physics Homework 6
Determine the direction of induced current in a wire Introductory Physics Homework 3
Induced current due to a Solenoid Introductory Physics Homework 16
Quick induced current from magnetic field question.. direction of current? Introductory Physics Homework 1