Magnetism worksheet featuring exercises on magnetic fields and compass needle directions.

Here’s the complete solution to your Magnetism Worksheet, with clear explanations and instructions for drawing the magnetic fields and compass needles.

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## 🔹 Problem 1: Draw a magnetic field for each of the following examples

➤ A) Two bar magnets placed side-by-side, both with N on left and S on right

Setup:
```
[ N ———— S ] [ N ———— S ]
```

Magnetic Field Lines:
- Magnetic field lines emerge from the North pole and enter the South pole.
- Between the two magnets, since like poles face each other (S of first magnet faces N of second), they repel.
- So, field lines will bend away from each other in the gap between the magnets.

How to draw:
1. Draw curved lines starting at the N pole of each magnet, looping around and ending at its own S pole.
2. In the space between the two magnets, draw field lines that curve outward (away from the center), showing repulsion.
3. Do not let field lines cross.

✔ *Visual Tip:* Imagine pushing two same ends of magnets together — the field lines “push apart” in the middle.

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➤ B) Three magnets: horizontal N-S, horizontal S-N, and vertical N (top)

Setup:
```
[ N ———— S ] [ S ———— N ]
|
[ N ]
|
(bottom is S — implied)
```

This arrangement has:
- Left magnet: N on left, S on right → field flows left to right
- Right magnet: S on left, N on right → field flows right to left (opposite direction)
- Vertical magnet: N on top → field flows downward (to S at bottom)

Interaction:
- The left magnet’s S pole faces the right magnet’s S pole → repulsion between them.
- The vertical magnet’s N pole is below the gap → it will attract the S pole of the left magnet and repel the N pole of the right magnet.

How to draw:
1. For left magnet: field lines go from N (left) → S (right).
2. For right magnet: field lines go from N (right) → S (left) — so opposite direction.
3. Between left and right magnets: field lines bulge outward due to repulsion between S poles.
4. For vertical magnet: field lines go from top (N) down to bottom (S). Near the gap, some field lines may curve toward the S pole of the left magnet or away from the N pole of the right magnet.

✔ *Tip:* Use arrows on field lines to show direction (N → S).

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## 🔹 Problem 2: Draw compass needles (arrows) showing direction they point

Compass needles align with the magnetic field lines. The North end of the needle points in the direction of the field line at that location.

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➤ a) Compasses on either side of a single bar magnet (N on left, S on right)

Setup:
```
○ —— [ N ———— S ] —— ○
```

Left compass:
- Located near the N pole of the magnet.
- Magnetic field lines emerge from N pole, so they point away from the magnet to the left.
- Therefore, the compass needle’s North end points left (away from magnet).

Right compass:
- Located near the S pole of the magnet.
- Magnetic field lines enter the S pole, so they point toward the magnet from the right.
- Therefore, the compass needle’s North end points right (toward magnet).

✔ Draw:
- Left compass: arrow pointing ← (North end left)
- Right compass: arrow pointing → (North end right)

---

➤ b) Compasses around a U-shaped (horseshoe) magnet

Setup:
```
○
|
○ —— [ N
|
S ] —— ○
|
○
```

In a horseshoe magnet:
- Field lines go from N pole → S pole, curving through the air gap.
- Outside the magnet, field lines loop from N to S.

Top compass:
- Above the magnet, field lines go from N (left) to S (right), curving over the top.
- So field direction is roughly → (rightward).
- Needle: North end points →.

Bottom compass:
- Below the magnet, field lines also go from N to S, but curving underneath.
- Direction is still roughly → (rightward).
- Needle: North end points →.

Left compass:
- To the left of N pole → field lines are emerging from N, so pointing ← away from magnet.
- Needle: North end points ←.

Right compass:
- To the right of S pole → field lines are entering S, so pointing → toward magnet.
- Needle: North end points →.

✔ Draw:
- Top compass: →
- Bottom compass: →
- Left compass: ←
- Right compass: →

*(Note: If compasses are very close to poles, needle may be nearly perpendicular to the magnet; if farther, more aligned with field curvature.)*

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## ✔ Final Answer Summary:

Problem 1:

- A) Field lines curve outward between magnets (repulsion), each magnet’s field loops from N to S.
- B) Field lines show repulsion between adjacent S poles, and vertical magnet’s field interacts accordingly.

Problem 2:

- a) Left compass: ← ; Right compass: →
- b) Top: → ; Bottom: → ; Left: ← ; Right: →

---

📌 Remember:
> 🧭 Compass North points along the magnetic field line direction (from N to S outside the magnet).

Let me know if you’d like a hand-drawn sketch version or printable answer sheet!