A wire along the -axis carries a current of in the negative -direction

PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A wire along the

x

-axis carries a current of

3.50\,\mathrm{A}

in the negative

x

-direction. Calculate the force, expressed in unit vectors, on a

1.00\,\mathrm{cm}

section of the wire exerted by these magnetic fields. (1)

\mathbf{B}=-(0.65\,\mathrm{T})\hat{\mathbf{j}}

(2)

\mathbf{B}=+(0.56\,\mathrm{T})\hat{\mathbf{k}}

(3)

\mathbf{B}=-(0.31\,\mathrm{T})\hat{\mathbf{i}}

(4)

\mathbf{B}=+(0.33\,\mathrm{T})\hat{\mathbf{i}}-(0.28\,\mathrm{T})\hat{\mathbf{k}}

(5)

\mathbf{B}=+(0.74\,\mathrm{T})\hat{\mathbf{j}}-(0.36\,\mathrm{T})\hat{\mathbf{k}}