Why should a solenoid tend to contract when a current passes through it?

Explanation

To understand why a solenoid tends to contract when a current passes through it, we can break down the explanation into several steps:

### Step 1: Understanding the Structure of a Solenoid
A solenoid is essentially a coil of wire, often wound in a helical shape. When no current is flowing, the solenoid has a certain length and shape.

**Hint:** Visualize the solenoid as a spring made of wire, with coils that can move closer together or farther apart.

### Step 2: Current Flow in the Solenoid
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