Two magnetic poles one of which is three times as strong as the other exert on each other, a force equal to $3 \times 10^{- 3}$ when separated by a distance of $10 c m$ . The strength of the each pole is

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Let m1-3m2F-x3BC-04-x3C0-m1m2r2-10-x2212-7-xD7-3m22-0-1-2-3-xD7-10-x2212-3N-x21D2-3m22-300-x2234-m2-10-xA0-Am-m1-30-xA0-Am

Two magnetic poles one of which is three times as strong as the other exert on each other, a force equal to $3 \times 10^{- 3}$ when separated by a distance of $10 c m$ . The strength of the each pole is

$5 A m, 15 A m$
$30 A m, 10 A m$
$20 A m, 60 A m$
$50 A m, 150 A m$

Let $m_{1} = 3 m_{2}$
$F = \frac{μ_{0}}{4 π} \frac{m_{1} m_{2}}{r^{2}} = 10^{- 7} \times 3 m_{2}^{2} / (0.1)^{2} = 3 \times 10^{- 3} N$
$\Rightarrow 3 m_{2}^{2} = 300$
$∴ m_{2} = 10 A m, m_{1} = 30 A m$

Two magnetic poles one of which is three times as strong as the other exert on each other, a force equal to 3×10−3 when separated by a distance of 10 cm. The strength of the each pole is5 Am,15 Am30 Am,10 Am20 Am,60 Am50 Am,150 Am

Let m1=3m2F=μ04πm1m2r2=10−7×3m22/(0.1)2=3×10−3N⇒3m22=300∴m2=10 Am,m1=30 Am

Two magnetic poles one of which is three times as strong as the other exert on each other, a force equal to $3 \times 10^{- 3}$ when separated by a distance of $10 c m$ . The strength of the each pole is

$5 A m, 15 A m$
$30 A m, 10 A m$
$20 A m, 60 A m$
$50 A m, 150 A m$

Let $m_{1} = 3 m_{2}$
$F = \frac{μ_{0}}{4 π} \frac{m_{1} m_{2}}{r^{2}} = 10^{- 7} \times 3 m_{2}^{2} / (0.1)^{2} = 3 \times 10^{- 3} N$
$\Rightarrow 3 m_{2}^{2} = 300$
$∴ m_{2} = 10 A m, m_{1} = 30 A m$