Briefly explain an activity to plot the magnetic field lines around a straight current carrying conductor. Sketch the field pattern for the same specifying current and field directions . What happens to the field if the strength of the current is decreased .
(2) if the direction of the current is reversed
Answers
Answer:
1. the strength of the magnetic field also decreases.
2. IDK
Answer:
The activity is:
1. Take a thick straight conductor XY and pass it through the centre of a thick cardboard.
2. Pass current through the conductor such that it flows from X to Y.
3. Sprinkle some iron filings on the cardboard and gently tap.
4. You will see that the iron filings arrange themselves in concentric circles around the wire.
5. These concentric circles represent the magnetic field lines.
To know the direction of the magnetic field, we plot the field lines with the help of a compass needle.
6. The North pole of the compass points in the direction of the field at any point.
7. The direction of these field lines is clockwise.
If the direction of current is reversed, these field lines are anticlockwise.
(1) When current is decreased, strength of the field also decreases.
(2) When the current is reversed, the field also gets reversed.
