Physics

Physics

Problem

35. Two long, parallel wires, fixed in space, carry currents

I_{1}

and

I_{2}

. The force of attraction has magnitude

F

. What currents will give an attractive force of magnitude 4F? (A)

2 \mathrm{I}_{1}

and

1 / 2 \mathrm{I}_{2}

(B)

\frac{1}{2} \mathrm{I}_{1}

and

1 / 2 \mathrm{I}_{2}

(C)

2 \mathrm{I}_{1}

and

2 \mathrm{I}_{2}

(D)

4 \mathrm{I}_{1}

and

4 \mathrm{I}_{2}

(A)

2 \mathrm{I}_{1}

and

1 / 2 \mathrm{I}_{2}

(B)

\frac{1}{2} \mathrm{I}_{1}

and

1 / 2 \mathrm{I}_{2}

(C)

2 \mathrm{I}_{1}

and

2 \mathrm{I}_{2}

(D)

4 \mathrm{I}_{1}

and

4 \mathrm{I}_{2}

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