SPM 3.1: How to draw Magnetic field Pattern?

Lets continue our discussion, the next objectives u must to know how to draw the :

i. magnetic field pattern due to current in a straight wire. ( How?)
- its simple, just follow a rule called Right Hand Thumb Rule
Look at both of this figure 3.12;

figure 3.12

We can also represent the line of magnetic fields in straight wire as shown in figure 3.13

figure 3.13

ii. Then u must know to draw magnetic field pattern in a coil
..to draw this check yr txt book or any reference book on the diagram. This kind of questions dah lama tak keluar SPM. The pattern should look like in the figure below. Ask your cikgu sekolah or tuition to teach u drawing this.
Things to be observed;
-What happen to the pattern if we reverse the batttery terminal?
- What happen if we increase amount of curent??


iii. U must Learn how to draw magnetic field pattern in a solenoid
This is another important field pattern to draw, it seems to be famous in trial or SPM exam.