Magnetic Field

To solve the problem, we need to find the length of the conductor moving in a magnetic field, which induces an emf. We are given:
- Speed
- Magnetic field
- Induced emf

1. Understanding the Formula:
The emf induced in a straight conductor moving perpendicular to a magnetic field is given by:


where:
- is the induced emf
- is the magnetic field
- is the length of the conductor
- is the velocity

2. Substituting the Given Values:

3. Solving for :

Final Answer:

The length of the conductor is .

To solve the problem, we need to understand the basic properties of magnetic lines of force (also called magnetic field lines).

1. Properties of Magnetic Field Lines:
- Magnetic lines of force represent the direction of the magnetic field at different points.
- They originate from the north pole and terminate at the south pole of a magnet.
- At any point in space, the tangent to the magnetic line gives the direction of the magnetic field.

2. Key Rule:
Magnetic field lines never intersect each other. If they did, it would imply that the magnetic field has two directions at the point of intersection, which is not possible.

Final Answer:
Magnetic lines of force