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#1 | Analogy b/w Electrostatics & Magnetostatics

(Physics) > Magnetism and Matter

Related Practice Questions :

A magnet of magnetic moment 20 C.G.S. units is freely suspended in a uniform magnetic field of intensity 0.3 C.G.S. units. The amount of work done in deflecting it by an angle of ${30}^{o}$ in C.G.S. units is

(a) 6

(b) $3\sqrt{3}$

(c) $3(2-\sqrt{3})$

(d) 3

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The magnetic field due to a short magnet at a point on its axis at distance X cm from the middle point of the magnet is 200 Gauss. The magnetic field at a point on the neutral axis at a distance X cm from the middle of the magnet is

(a) 100 Gauss (b) 400 Gauss

(c) 50 Gauss (d) 200 Gauss

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A magnet of magnetic moment $50\hat{i}A-{m}^{2}$ is placed along the *x*-axis in a magnetic field $\overrightarrow{B}=(0.5\hat{i}+3.0\hat{j})T$. The torque acting on the magnet is

(a) 175 $\hat{k}$ N-m

(b) 150 $\hat{k}$

(c) 75 $\hat{k}$ N-m

(d) 25$\sqrt{37}$ $\hat{k}$ N-m

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