## What are magnetic fields, Physics

Assignment Help:

What are Magnetic Fields?

Like electric and gravitational fields, a magnetic field is a construct which helps you determine the force on a pole due to a magnet generating the field. The force drops off as you move away from the magnet just as for gravitational and electric fields. The arrows of the field indicate the direction that a north pole would be pushed. The density of field lines is proportional to the strength of the magnetic field: the more lines the stronger the field, and the fewer lines, the weaker the field. Sometimes we speak of the density of field lines as the magnetic flux, which is the quantity of field lines passing through normal to a surface area. More flux means a stronger field, and less flux means a weaker field.

There is a weak magnetic field around the Earth which we use for direction every time we use a compass (a small magnet which will line up with the Earth's magnetic field lines).

#### Illustrate what is ntu in thermodynamics, Q. Illustrate what is ntu in ther...

Q. Illustrate what is ntu in thermodynamics? Answer:- The ntu is nothing but number of transfer units it is one of the method utilized to find the heat transfer of hot and

#### What is addition reaction, When atoms (or) group of atoms are added, to for...

When atoms (or) group of atoms are added, to form more saturated compound it is known as addition reaction.

#### Free body diagram, illustrate the situation. the child is on the slide

illustrate the situation. the child is on the slide

#### Beryllium copper alloy, Beryllium copper alloy: It is obtained by alloying...

Beryllium copper alloy: It is obtained by alloying copper and beryllium. These alloys containing beryllium up to 2.75% can be produced in the form of sheet, rod, wire and tube. Be

#### Experiment of a wooden ring stand, A wooden ring stand The bottom for t...

A wooden ring stand The bottom for this ring stand is made from a piece of wood 40 cm long, 15 cm wide and 1 cm thick. A whole 1 cm in diameter is bored by the centre of the ba

#### 1 coulumb charges, 1 Coulumb Charges: 1 coulumb charge is that amount o...

1 Coulumb Charges: 1 coulumb charge is that amount of charge which when placed 1 m from an identical charge in vacuum which repels it with a force of 8.99 × 109 N.

#### What do you mean by additive nature of charges, Q. What do you mean by addi...

Q. What do you mean by additive nature of charges? Give an example. Additive nature of charge The entire electric charge of a system is equal to the algebraic sum of electric

#### Define electric field lines for infinite sheet of +iv charge, For an infini...

For an infinite sheet of positive charge, the electric field lines: a) Run parallel to the sheet of charge b) Are perpendicular to the sheet of charge and point in toward

#### Plane and convex mirrors, (a) You have studied that plane and convex mirror...

(a) You have studied that plane and convex mirrors produce virtual images of objects. Can they generate real image under some circumstances? Explain. (b) A virtual image we a

#### Low resistivity materials, Low resistivity materials: The conducting mater...

Low resistivity materials: The conducting materials having resistivity between 10 -8 to 10 -6 ohm-m come under this category and are used in house wiring, as conductors for powe