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Give two methods by which friction is re...

Give two methods by which friction is reduced in the wheels of the car.

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BINA LIBRARY-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT-EXERCISE
  1. An inductor of reactance 10Ω and resistance 10Ω are connected in serie...

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  2. A capacitor and resistor are connected in series with an ac source. If...

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  3. Give two methods by which friction is reduced in the wheels of the car...

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  4. A source of alternating emf of 220 V and 50 Hz is connected in series ...

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  5. A rectangular coil having 60 turns and area of 0.4m^2 is held at rig...

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  6. sinusoidal voltage V = 200 sin 314 t is applied to a resistor of 10Ω. ...

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  7. A 3muF capacitor is connected to a 220V, 50 Hz a.c. source. Calculate ...

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  8. A capacitor of 50µF, a resistor of 102 and an inductor L are in series...

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  9. The turns-ratio of a step up transformer is 1:10 and a current of 1.5 ...

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  10. Calculate current drawn by the primary of a transformer, which steps d...

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  11. When current changes from 3A to 2A in one millisecond a coil produces ...

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  12. The co-efficient of mutual inductance when magnetic flux changes by 2 ...

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  13. The mutual inductance of an induction coil is 5H. In the primary coil ...

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  14. A coil of wire of radius r has 600 turns and a self inductance of 108 ...

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  15. The average power dissipation in a pure capacitor in ac circuit is

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  16. The average power dissipation on a pure inductor L in an ac circuit is

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  17. An oscillator circuit consists of an inductance of 0.5 mH and capacito...

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  18. A transformer has 2100 tums in primary and 4200 turns in secondary. An...

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  19. A dynamo acts as a

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  20. Lenz's law is a consequence of the law of conservation of

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