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A wheel with 100 metallic spokes each 1 m long is rotated with a speed of 120 `"rev"/"min"` in a plane normal to the horizontal component of earth's magnetic field `H_E` at a place. If `H_E` = 0.4 G at the place, what is the induced emf between the axle and the rim of the wheel ? Note that 1G=`10^(-4)` T

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The correct Answer is:
`epsilon=25.12xx10^(-5)` V
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KUMAR PRAKASHAN-ELECTROMAGNETIC INDUCTION-Section B (Numerical) Textual Illustrations
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  2. Refer to figure the arm PQ of the rectangular conductor is moved from ...

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  5. Kamla peddles a stationary bicycle. The pedals of the bicycle are atta...

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  6. A square loop of side 10 cm and resistance 0.5 Omega is placed vertica...

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  7. A square loop of side 10 cm and resistance 0.5 Omega is placed vertica...

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  8. A circular coil of radius 10 cm, 500 turns and resistance 2Omega is pl...

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  9. A circular coil of radius 20 cm, 500 turns and resistance 4Omega is p...

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  10. A wheel of radius r having conducting rim and n no. of conducting spok...

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  11. One metallic ring of radius 2 m has a conducting rod connected between...

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  12. One metallic ring of radius 1 m has a conducting rod connected between...

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  13. A wheel with 100 metallic spokes each 1 m long is rotated with a speed...

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  14. A wheel with 10 metallic spokes each 1 m long is rotated with a speed ...

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  15. One U shaped conducting frame is placed in a plane perpendicular to un...

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  16. As shown in the figure, a conducting rod of length I, mass m and resis...

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  17. One extremely small and another extremely big square frames are coplan...

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  18. One toroid has 1.5 xx 10^4 turns and its axis forms a circle of radius...

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  19. Kamla peddles a stationary bicycle. The pedals of the bicycle are atta...

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  20. Kamla peddles a stationary bicycle. The pedals of the bicycle are atta...

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