What will happen if a currrent carrying conductor passes through a magnetic field?
1. An electromagnet is formed.
2. The conductor experiences a force.
Remember I chose the first one. But it is wrong. Is it because this is a situation of "Lens" law?(unsure of the spelling, but it is pronounced as "lenses"). I know this is a rather common sensical question, but could someone explain? Thanks.
It is not Lenz's law.
A current carrying conductor will always experience a force when passing through a magnetic field, and the direction of the force is given by Fleming's Left Hand Rule
As to why there will be a force, I'm not 100% sure as well. It's too advanced I guess.
You will have to understand the relationship between electric field and magnetic field. JC/Poly level will teach explain abit more on this, but if you really want to know what cause electric field and magnetic field, it will be degree level or up
Hmm...adding to what that has been already said...
"1. An electromagnet is formed." is in fact true also. But the question seems to be asking about the force a charge experiences when passing through a magnetic field. So "2." will be a better answer.
"2. The conductor experiences a force." is not always true. For example if you only have a constant current passing through a conductor, there will not be a force due to the magnetic field, since there is no magnetic field in the first place. Hence the option "2." is unique to this scenario and most likely is the answer...
The somewhat general principle is that if you have some charges moving in a magnetic field then that some charges will experience a force perpendicular to both the velocity of the charges and the direction of the magnetic field.
Overall I find this question somewhat unclear in what they want, but still you can roughly guess they are asking for "2."
Lenz's law is a statement of the conservation of energy. For the general law for time varying magnetic fields creating 'opposing' electric fields, that's Faraday's law. Lenz's law is included in Faraday's law.
:D
Originally posted by eagle:It is not Lenz's law.
A current carrying conductor will always experience a force when passing through a magnetic field, and the direction of the force is given by Fleming's Left Hand Rule
As to why there will be a force, I'm not 100% sure as well. It's too advanced I guess.
well eagle...fyi...now the syllabus changes...theyre using the right hand rule..which is for motor..they dont learn about left hand rule..ac generator..transformers...AND NUCLEAR PHYSICS!ma fan aa
Originally posted by LoudnessFZ:well eagle...fyi...now the syllabus changes...theyre using the right hand rule..which is for motor..they dont learn about left hand rule..ac generator..transformers...AND NUCLEAR PHYSICS!ma fan aa
Err... Fleming's left hand rule is in syllabus (at least it is in syllabus for 2009 O levels)
Right hand rule is not.
Left hand rule is to find induced force; right hand rule is for induced current.
For more info, please refer to http://www.seab.gov.sg/SEAB/oLevel/syllabus/2009_GCE_O_Level_Syllabuses/5056_2009.pdf