A) \[3\times {{10}^{-3}}N-m\]
B) \[1.5\times {{10}^{-3}}N-m\]
C) \[1.5\times {{10}^{-2}}N-m\]
D) \[3\times {{10}^{-2}}N-m\]
Correct Answer: C
Solution :
| [c] Given, \[N=2000,A=1.5\times {{10}^{-4}}{{m}^{2}}\] |
| \[i=2.0AB=5\times {{10}^{-2}}T,\] |
| and \[\theta ={{30}^{o}}\] |
| Torque \[\tau =NiBA\sin \theta \] |
| \[=2000\times 2\times 5\times {{10}^{-2}}\times 1.5\times {{10}^{-4}}\times \sin {{30}^{o}}\] |
| \[=2000\times 50\times {{10}^{-6}}\times \frac{1}{2}\] |
| \[=1.5\times {{10}^{-2}}Nm\] |
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