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A circular coil of radius r carries a current I . It produces magnetic fields `B_(1)` at the centre of the coil and `B_(2)` at an axial point at a distance r from the centre. The ratio of `B_(1)` and `B_(2)` is

A

`sqrt2:1`

B

`2:1`

C

`2sqrt2:1`

D

`4:1`

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CHHAYA PUBLICATION-ELECTROMAGNETISM -EXERCISE
  1. Which one of the following relations expresses Biot-Savart law ?

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  2. If we double the radius of a current carrying coil keeping the current...

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  3. A circular coil of radius r carries a current I . It produces magnetic...

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  4. In the given figure a conductor is carrying a current I. The magnitude...

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  5. Ratio of magnetic fields at the centre of a current carrying coil of r...

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  6. Two wires PQ and QR carry equal currents I. One end of each wire exten...

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  7. A vertical straight conductor carries a current vertically upwards. A ...

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  8. Magnitude of magnetic field at the point P in arrangement shown in the...

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  9. The magnetic field at the point of intersection of diagonals of a squa...

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  10. A circular coil of radius R carries an electric current i. The magneti...

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  11. The magnetic field B within a solenoid of length L with N turns and ca...

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  12. In a current carrying long solenoid, the field produced inside the sol...

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  13. A charged particle enters a magnetic field vec(B) perpendicularly with...

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  14. The radius of the circular path described by a charged particle in a m...

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  15. The magnitude of an electric field along x-axis is 1V.m^(-1) and in th...

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  16. A beam of protons projected along positive x-axis experiences a force,...

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  17. A moving electron and a moving proton enter a uniform magnetic field i...

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  18. An alpha- particle and a proton having the same momentum enter a regio...

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  19. A uniform electric field and a uniform magnetic field are acting along...

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  20. A particle of charge q moves with a velocity vecv=ahati+bhatj in magne...

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