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A toroidal solenoid with an air core has...

A toroidal solenoid with an air core has an average radius of 15 cm , area of cross-section `12 "cm"^(2)` and 1200 turns . Ignoring the field variation across the cross-section of the toroid the self-inductance of the toroid is

A

4.6 mH

B

6.9 mH

C

2.3mH

D

9.2 mH

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The correct Answer is:
c
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MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-2 (Objective problems (Analytical questions))
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  3. A toroidal solenoid with an air core has an average radius of 15 cm , ...

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  4. A circular iron, core supports N turns . If a current I produces a mag...

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  5. The self inductance of a toroid is :-

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  6. In Fig (a) and (b), two air-cored solenoids P and Q have been shows. T...

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  7. A small square loop of wire of side l is placed inside a large square ...

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  8. A player with 3 meter long iron rod runs toward east with a speed of ...

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  9. A 10-meter wire is kept in east-west direction. It is falling down wit...

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  10. A conducting rod of length 2l is rotating with constant angular speed ...

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  11. A conducting rod of 1m length rotating with a frequency of 50 rev/sec....

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  12. A semicircle loop PQ of radius 'R' is moved with velocity 'v' in trans...

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  13. A car moves up on a plane road. The induced emf in the axle connecting...

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  14. If an artificial satellite with metal surface is moving in the equator...

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  15. Which statement ios not correct :-

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  16. A metal aeroplane having a distance of 50 meter between the tips of it...

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  17. The loop shown moves with a velocity v in a uniform magnetic field of ...

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  18. A conducting wheel in which there are four rods of lengthe l as shown ...

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  19. A conducting rod rotates with a constant angular velocity 'omega' abou...

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  20. Two long parallel metallic wires with a resistance 'R' from a horizont...

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