The Student Room Group
Reply 1
lalalaura
a solenoid is connected to a sensitive galvanometer a bar magnet is pushed quickly into the solenoid and then removed atthe same speed what would you expect to see happen on the galvanometer? and how can you explain these observations?

the action is now repeated at a high speed what difference in teh response of the galvonometer would u expect?

thanks a lot


the galvanometer moves from positive to negative values. When it moves in, the galvanomoter reads a value then when it moves back (the opposite direction) the galvanometer moves to a value of opposite sign to the first reading. They may be of similar magnitude - depends on the speed that it is moved. So because both movements are of same speed they should be of same magnitude. When the bar is moved at a higher speed the magnitude of the readings gets larger because the movement is faster and causes a greater electromagnetic induction. If moving too fast the galvanometer will not be able to keep up and can cause erratic readings.

At least i think this is what would happen. :smile: :biggrin: :confused:
Reply 2
ryan750
the galvanometer moves from positive to negative values. When it moves in, the galvanomoter reads a value then when it moves back (the opposite direction) the galvanometer moves to a value of opposite sign to the first reading. They may be of similar magnitude - depends on the speed that it is moved. So because both movements are of same speed they should be of same magnitude. When the bar is moved at a higher speed the magnitude of the readings gets larger because the movement is faster and causes a greater electromagnetic induction. If moving too fast the galvanometer will not be able to keep up and can cause erratic readings.

At least i think this is what would happen. :smile: :biggrin: :confused:

thankyou!!!