Parallel Connection - 3B SCIENTIFIC PHYSICS U185051 Instrucciones De Uso

3. Operation
3.1 Setting up the coils for a transverse field
•
Insert the coils into the middle of the coil slot
and push them out as far as they go. Make sure
the connectors point outwards.
•
Insert the hot cathode tube into the holder.
•
For Helmholtz configuration d = r the outer
edges of the coil base should be flush with the
dashed lines (refer to Fig. 1).
3.2 Setting up a coil for an axial field
•
Insert the hot cathode tube into the holder.
•
Slot the base of the coil into the groove from
the front making sure that the connectors point
forwards (refer to Fig. 2).
•
When using both coils, put the base of the sec-
ond coil onto the plugs of the first coil.
Fig. 1 Setting up the coils for a transverse field
Fig. 2 Setting up a coil for an axial field
2
3.3 Determining the current in the coils
3.3.1 Series connection
•
When the coils are to be connected in series,
connect terminal Z of coil 1 to terminal Z of coil
2 (refer to Fig. 3.1).
•
Take into account the total current when calcu-
lating B.

3.3.2 Parallel connection

•
When the coils are to be connected in parallel,
connect terminal A of coil 1 to terminal Z of coil
2 and terminal Z of coil 1 to terminal A of coil 2
(refer to Fig.3.2).
•
To calculate B the total current 2 I should be
halved since both coils have the same resistance
and half the current I passes through each one.