Question

Mention any two factors, on which the strength of magnetic field of a straight current-conductor depends.
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Answer 1

Answer:

Greater the current in the conductor, stronger will be the magnetic field will be produced. Strength of the magnetic field is inversely proportional to the distance from the wire. Greater the distance from the current carrying conductor, weaker will be the magnetic field.

Answer 2

(1) Magnetic field due to straight conductor at a point

$B= \frac{μ _{o}I }{2\pi \: d }$

So, magnetic field depends on the current flowing and distance (d) of that point.

(2)Magnetic field due to solenoid

$\huge\mathtt {{B= \frac{μNi}{l} }}$

So, the magnetic field depends on the current flowing, the number of turns in solenoid and length of the solenoid