IB HL Physics Magnetic flux

A tutorial sheet on magnetic flux is given below.

1. Define magnetic flux density.
2. Define magnetic flux.
3. Define one tesla.
4. Define one weber.
5. Can the magnetic flux through a coil be increased by increasing the number of turns in the coil?
6. The equation giving the magnetic flux through an area is ϕ = BAcosθ. How is the angle θ defined?
7. Define magnetic flux linkage.
8. Several properties of the magnetic flux are given below. Which are correct and how could these be improved? a) magnetic flux is the amount of magnetic field crossing an area, b) magnetic flux is the number of magnetic field lines crossing an area, c) magnetic flux through a plane area is the product of the area and the sum of all of the perpendicular B components crossing it, d) the magnetic flux through any closed surface is always zero.

IB Physics Why is the magnetic force perpendicular to the current?

Why does the magnetic force on a current push perpendicular to the conductor? The magnetic field direction around a straight wire carrying a current in a uniform external magnetic field is shown below. The current is flowing out of the page and the uniform magnetic field direction is to the right. The diagram shows the resultant magnetic field found by adding the magnetic field created by the current and the uniform magnetic field. Magnetic field lines can be thought of as exerting a tension along their length and a pressure perpendicular to their length, like elastic bands. What does the diagram suggest about the direction of the magnetic force acting on the current? Upwards, in agreement with the right hand palm rule.