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A ceiling fan is rotating with a speed 50 rpm in a region where the magnitude & direction of terrestrialmagnetic field is 02 T, 30º N. If length of a blade of the fan is 40 cm, find the potential difference acrossthe ends of each blade. Mention at which end of the blade the electrons will be accumulated ó at theend connected with the fan or at the furthest end from the fan ? |
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Answer» Answer: DIAMETER =2R=120cm=120×10 −2 m Rpm=1500 Revolution PER second = 60 1500
=25 Angular velocity w=25×2π=50πrad/s a) Force =mrw 2
=1×10 −3 ×60×10 −3 ×2500pi 2
=14.8N b) The fan exerts this force on the particle. c) By NEWTON's third law the particle ALSO exert 14.8N of force on the blade along its surface. |
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