A wire of mass carries a current of towards increasing in the form

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A wire of mass

100\text{ g}

carries a current of

2\text{ A}

towards increasing

x

in the form

y=x^2

, where

-2\text{ m}\leq x\leq2\text{ m}

. This wire is placed in a magnetic field

\mathbf{B}=-0.02\hat{\mathbf{k}}\text{ T}

. The acceleration of the wire in

\text{m}/\text{s}^2

is (a)

-1.6\hat{\mathbf{j}}

(b)

-3.2\hat{\mathbf{j}}

(c)

1.6\hat{\mathbf{j}}

(d) zero

Related theory

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