Which factors affect the strength of a magnetic field around a current-carrying wire? check all that apply. 1. the type of metal of the wire 2. the amount of the current 3. the direction of the current 4. the temperature of the wire 5. the distance of the wire.

Explanation:

The strength of magnetic field around a current carrying wire is given by :

Where

is magnetic permeability

I is the current flowing in wire

r is radial distance

So, the factors on which the strength of magnetic field around a current carrying wire depend are :

(1) Type of metal of the wire. The magnetic permeability depend on the availability of unpaired electron in metals.

(2) The amount of current. Magnetic field strength depend directly on the current flowing.

(3) The direction of current. When the current is in upward direction, the magnetic field will be in anticlockwise direction.

(4) The distance of wire. There is an inverse relationship between the magnetic field strength and distance.

scientific laws are the result of testing theories and proving them to be facts.