Question

Calc
calculate the magnetic field strength when a current of 3a flows in a wire 2.5m long and produce a force of 15n

Answer 1

Answer:

2 is the correct answers

Explanation:

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Answer 2

Answer:

The magnetic field strength is 2N/Am

Explanation:

Given that,

Magnitude of current which flows in wire is $i=3A$

Length of the wire is $l=2.5m$

The force produced due to magnetic field is $F=15N$

Now we are required to find the magnetic field strength(B) which can be found using Lorentz Law.

It states that the force generated on a current carrying wire placed in an magnetic field is the product of its length,current and magnetic field strength.Therefore we write

$F=Bil$

Substituting the known values in above relation,we get

$15=B\times3\times2.5= > B=2N/Am$

Therefore,the magnetic field strength is found to be 2N/Am

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