Physics Practicals (1 Viewer)

[StGeorgeDragons]

which experiment is used to show production of an alternating current?

 

[rama_v]

put a magnet in and out of a coil...you will see that the current produced in teh coil flicks back and forth if its connected to an ammeter. Hence AC is induced.

 

[StGeorgeDragons]

no thats not it

 

[dimzi]

Yes it is, there may be another one, but that one does produce an AC.

The coil is called a solenoid btw.

 

[who_loves_maths]

Yes it is, there may be another one, but that one does produce an AC.

i think Codereder is looking for the prac where you just "see" AC as opposed to DC. in this case i think it's the one where you just connect the transformer rectifier unit to a CRO which displays AC current and voltage against time as a sinusoidal wave.
and then you probably would compared it to a DC current generated by a hand operated DC generator. the current is just semi loops with critical points on the time axis - it doesn't go below the axis.

 

[thunderdax]

get a magnet on an axle, turn it above a solenoid hooked up to a galvanometer. the reading goes back and forth.

 

[nanashi]

get a magnet on an axle, turn it above a solenoid hooked up to a galvanometer. the reading goes back and forth.

we did the same, except it was connected to a CRO. we could see that the current was AC coz the wave was both +ve and -ve (sorta like a sine curve)

 

[StGeorgeDragons]

yeh thats the one, thanks

 

[DaddyK]

I need prac reports people, If any one has any saved on there PC about "Moving about" or "The world communicates" waves etc. Would you be able to send them to daves_vl@hotmail.com it would be HUGELY appreciated. thanks. BTW dont warry after wednesday this week. sorry for hi jack