What are the rules for drawing lines of magnetic flux?

The properties of magnetic field lines can be summarized by these rules: The direction of the magnetic field is tangent to the field line at any point in space. A small compass will point in the direction of the field line. The strength of the field is proportional to the closeness of the lines.

What does magnetic flux depend on?

The magnetic flux through a surface—when the magnetic field is variable—relies on splitting the surface into small surface elements, over which the magnetic field can be considered to be locally constant. The total flux is then a formal summation of these surface elements (see surface integration).

What are the two basic rules of magnetism?

This demonstrates two of the laws of magnetism. These laws are stated: Like poles repel each other. Unlike poles attract each other.

What must a magnet always have?

What must a magnet always have? All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction.

What are the 3 rules of magnets?

These are for (1) long, straight wires, (2) free moving charges in magnetic fields, and (3) the solenoid rule – which are loops of current. Calling these “rules” is the right name. They are not laws of nature, but conventions of humankind.

What are the 4 laws of magnetism?

The operation of electric motors is governed by various laws of electricity and magnetism, including Faraday’s law of induction, Ampère’s circuital law, Lenz’ law, and the Lorentz force.

What is magnetic flux in physics class 12?

Magnetic flux: The total number of magnetic field lines passing through a given area normal to it is called magnetic flux. Mathematically it is represented by ϕ and defined as the dot product of magnetic field vector and area vector i.e. given by. ϕ=→B. →A.

How to determine the magnetic flux?

The magnetic flux value depends on the magnetic field direction and it is a vector quantity. Θ = Angle between the magnetic field and normal to the surface. The Dimension of a rectangular loop is 0.50m and 0.60m. B and θ are 0.02T and 45° respectively. Determine the magnetic flux through the surface.

Why is the net magnetic flux through a closed surface zero?

This means that the net magnetic flux through such a closed surface is always zero and therefore all the magnetic field lines going into the closed surface are exactly balanced by field lines coming out. This fact is useful for simplifying magnetic field problems.

What is the magnetic flux of a curl?

Magnetic flux. From the definition of the magnetic vector potential A and the fundamental theorem of the curl the magnetic flux may also be defined as: where the line integral is taken over the boundary of the surface S, which is denoted ∂ S .

What happens to the flux as the loop slides through it?

At point 2 the external field is INTO the page. This magnetic field passes through the loop and is the source of magnetic flux through the coil. As the loop slides by position 1, the flux through the loop is INCREASING and it is Pointing OUT OF THE PAGE.