Which rule is used to find the direction of field produced by a solenoid?

Explanation

To determine the direction of the magnetic field produced by a solenoid, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Solenoid**: A solenoid is essentially a coil of wire that is wound in a helical shape. When an electric current passes through the wire, it generates a magnetic field.

2. **Identify the Direction of Current**: Determine the direction of the current flowing through the solenoid. For example, let’s assume the current flows from the bottom to the top of the solenoid.

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