Question

With the help of labelled circuit diagram white describe an activity to illustrate the pattern of magnetic field lines around a straightcurrent carrying long conducting wire.
1. Name the rule that is used to find the direction of magnetic field associated with a current carrying straight conductor.
2. Is there a similar magnetic field produced around a thin beam of moving
a) alpha particles and
b) neutrons? Justify your answer.

Answer 1

Apparatus: A battery (12 V), a variable resistance for a rheostat), an ammeter (0-5 A), a plug key, and a long straight thick copper wire. Procedure: Fix the cardboard and insert the wire through the centre of cardboard such that it is normal to its plane. Connect the wire with rheostat, ammeter, battery and plug key in series Sprinkle the iron filings uniformly on the cardboard. Keep the variable of the rheostat at a fixed position and note the current through the ammeter. Close the key and gently tap the cardboard. Observe the pattern of the iron filings over the cardboard.

Answer 2

1- rule is - sprink some iron fillings on the top of table and gently tap on the table