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The magnetic field at a distance r from ...

The magnetic field at a distance r from a long wire carrying current is 0.6 tesla. The magnetic field at a distance 2r is

A

0.6 tesla

B

0.3 tesla

C

1.2 tesla

D

2.4 tesla

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CHETANA PUBLICATION-Magnetic Fields due to Electric Current-Exercise
  1. If 'R' is the radius of dees and B the magnitude of the magnetic field...

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  2. A conductor of length '1' and carrying current "I" kept in uniform mag...

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  3. The magnetic field at a distance r from a long wire carrying current i...

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  4. A cyclotron is a device which is generally used to

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  5. In a cyclotron, the applied magnetic field

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  6. The electric field used in a cyclotron to accelerate charged particles...

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  7. In cyclotron, time period of revolution inside the dees is

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  8. Maximum kinetic energy of the positive iron in the Cyclotron is

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  9. Cyclotron is a device by which

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  10. In side hollow dees of cyclotron, charge particles are under the influ...

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  11. Charged particle in motion will produce

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  12. A solenoid is 2 m long and 3 cm in diameter. It has 1000 turns and car...

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  13. A long horizontal overhead high tension wire, fixed in east-west direc...

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  14. A solenoid of length 1.5 m and diameter 4 cm has 10 turns per meter. A...

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  15. A very long solenoid has 8400 winding and a length of 7m. If the field...

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  16. A toroid with a circular cross-section has a current I in its winding....

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  17. Cyclotron can not accelerate

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  18. If a particle of charge q is moving with a velocity v in a direction o...

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  19. A conductor of length lm and carrying current of 1A is placed at an an...

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  20. The maximum force acting on a straight conductor of length 15 cm place...

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