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| Numerical 10 |
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| 10. A straight solenoid has 400 turns wound on a cylinder of radius 5cm and length 40cm. What is the magnetic field at the mid-point of solenoid when a current of 2A flows in it? |
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| Suggested solution: |
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| N = 400 L = 40cm = 0.4m I = 2A |
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| The magnetic field at the mid-point is |
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| = 2.438 x 10-3 T |
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Moving Charges and Magnetism
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