There are so many hand rules, like the one in the previous video, this one and the one contains only the current and magnetic field, and there is also one more which I cannot seem to remember, how can we recall (not memorize but remember) these rules during an exam or solving a question ? Is there a chart or a source that contains all of the ones that you are talking about ? Maybe on your website ?
velocity and magnetic field form a plane. The force is perpendicular to this plane. The hand rules just tell you which side of the plane the force will point out of.
Electrons are what actually move, however, the convention for current is positve charge flow. Negative charge flow in one direction is equivalent to positive charge in the opposite direction.
Hello mr doner, just to be clear you use your right hand for positive charges as well as to find b-field and current in wires and solenoids, and the left hand is only for negative charges?
I think I found a mistake. At 10:00 you drew the components parallel and perpendicular to the current, but we're supposed to have the components parallel and perpendicular to the magnetic field.
We can do it either way, and the way I have done it is less conventional, however, I thought it helped to make a clearer explanation. The magnitude of the component of A on B is equal to the magnitude of the componen t of B on A.
Of course the results and the same. Fleming forms a plane with the thumb and index finger, and the force (middle finger) points perdicular to this plane.
your videos are so great, they have helped so much
I didnt understand formula used at 18:17, is the explanation there in any of your other videos?
It is in the magnetic fields video
There are so many hand rules, like the one in the previous video, this one and the one contains only the current and magnetic field, and there is also one more which I cannot seem to remember, how can we recall (not memorize but remember) these rules during an exam or solving a question ? Is there a chart or a source that contains all of the ones that you are talking about ? Maybe on your website ?
velocity and magnetic field form a plane. The force is perpendicular to this plane. The hand rules just tell you which side of the plane the force will point out of.
If the magnetic field lines flow from south to north inside the magnet then why are we drawing them from North to South (for eg at 3:59) ?
That is outside the magnet. Between magnets and outside of both of them.
at 2:46, you said to use the right hand but doesn't current have a negative charge ?
Electrons are what actually move, however, the convention for current is positve charge flow. Negative charge flow in one direction is equivalent to positive charge in the opposite direction.
Do we have to remember the formula at 20:29 ?
You don't need to remember any formulas in IB Physics.
I was glad to see your explanation behind why coulomb wasn't a fundamental unit. I was always curious about that!
Nice to hear.
Hello mr doner, just to be clear you use your right hand for positive charges as well as to find b-field and current in wires and solenoids, and the left hand is only for negative charges?
Yes, current is by convention the movement of positive charge. The left hand is only used for the movement of negative charge, typically electrons.
I think I found a mistake. At 10:00 you drew the components parallel and perpendicular to the current, but we're supposed to have the components parallel and perpendicular to the magnetic field.
We can do it either way, and the way I have done it is less conventional, however, I thought it helped to make a clearer explanation. The magnitude of the component of A on B is equal to the magnitude of the componen t of B on A.
just had a quick question about forces between current carrying wires, how did we know that B1= (mu zero*I1)/(2pi)d.
Could be determined experimentally or theoretically.
Is your hand rule the same as fleming left hand rule?
Of course the results and the same. Fleming forms a plane with the thumb and index finger, and the force (middle finger) points perdicular to this plane.
@@donerphysics The rule you have taught is so much more simple
Why does the force on wire using the field line diagram result in an upward force?
In the diagram of the video, the field lines bunch up below the wire, and we can think of this as producing an upwards force.