Refer to the diagram attached inside. A magnet is moved into a coil that is connected to a galvanometer. Explain how applying Lenz’s law helps determine the direction of the induced emf in the coil. What is the direction of the induced emf in the coil? Explain how the direction can be verified using the second right-hand rule.

**Not sure how to do this? Thank you!!

Question

Refer to the diagram attached inside. A magnet is moved into a coil that is connected to a galvanometer. Explain how applying Lenz’s law helps determine the direction of the induced emf in the coil. What is the direction of the induced emf in the coil? Explain how the direction can be verified using the second right-hand rule.
 
**Not sure how to do this? Thank you!!

anonymous · Answer

Diagram!! :)

anonymous · Answer

Think about this in terns of the direction that the magnetic field would have to be in the coil to oppose the motion of the bar magnet moving into the coil.

According to Lenz' Law, the current induced in the coil will be such that the magnetic field produced will oppose the external magnetic field.

anonymous · Answer

i am unsure... so to explain how how applying lenz' law helps determine the direction of the induced emf in the coil, how would i explain that? just that current induced is producing opposite of the external magnetic field? I do not understand very clearly :(

michele_laino · Answer

when I move the coil upward, the flux of the external magnetic field inside the coil will increase, so inside that coil will appear a current whose effect is to decrease the total magnetic field inside our coil: so we have the subsequent drawing:
|dw:1432660970223:dw|
in other words, the induced current will cause a magnetic field against the external magnetic field