Question

With the help of a labelled circuit diagram wire describe an activity to illustrate the pattern of the magnetic field lines around a straight current carrying long conducting wire .

i) Name the rule that is used to find the direction of magnetic field associated with a current carrying conductor.

i) Is there a similar magnetic field produced around a thin beam of moving
(a) alpha particles and
(b) neutrons?
Justify your answer.

Answer 1

1) Right hand thumb rule
2)yes, because alpha particles consists of positive particles, which can produce a similar magnetic field.
In neutrons, it cannot because it has no moving particles in it, it is electrically neutral.

Answer 2

for activity refer to the image

Ans1) Right hand thumb rule
Ans 2) In case of alpha particles a similar magnetic field will be produced as it consists of positive charge thus attractive force will act
Ans 3) In case of neutrons no such magnetic field is produced as it does not consist of any charge

Activity description:-

1)Figure shows a wire XY carrying current.This wire is passed through a cardboard.
2)Sprinkle some iron filings on the cardboard
3)plugging the key for the current to pass in the wire, tap the cardboard few times
4)we will find that the iron filings will align itself showing a pattern of concentric circles
5)they represent magnetic field lines
6)place a compass near the wire it deflects in the direction of the north pole will give the direction of field line produced
7)on reversing the direction of current the direction of the deflection of needle also get reversed
8)using the rheostat current in the wire can be increased which increases the deflection of the compass showing that the magnetic field intensity increases on increasing the current
9)keeping the current constant if the needle is taking closer to the wire it is found that the deflection of needle increases showing that the magnetic field is stronger near the wire

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