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A current balance is a device to measure...

A current balance is a device to measure magnetic forces. It is constructed from two parallel coils, each with an average radius of 12.5 cm. The lower coil rests on a balance, it has 20 turns and carries a constant current of 4.0 A. The upper coil, suspended 0.314 cm above the lower coil, has 50 turns and a current that can be varied. The reading of the balance changes as the. magnetic force on the lower coil changes. What current is needed in the upper coil to exert a force of 1.0 N on the bottom coil?

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MODERN PUBLICATION-FORCE ON A CURRENT-EXERCISE
  1. A current balance is a device to measure magnetic forces. It is constr...

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  2. When is the force experienced by a current carrying conductor placed i...

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  3. Find the force acting on a current carrying conductor placed in an uni...

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  4. When is the force experienced by a current carrying conductor placed i...

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  5. When is the force experienced by a current carrying conductor placed i...

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  6. Derive an expression for the torque acting on a rectangular current ca...

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  7. Write the expression for the magnitude of force per unit length betwee...

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  8. Two parallel wires carrying currents in the same direction attract eac...

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  9. Define an ampere in terms of the force between current carrying conduc...

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  10. WHat is the direction of force between two parallel conductors carryin...

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  11. Two long straight parallel conductors 'a' and 'b', carrying steady cur...

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  12. Prove that the parallel conductors of infinite length, carry current i...

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  13. WHat is the direction of force between two parallel conductors carryin...

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  14. Write the expression for the magnitude of force per unit length betwee...

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  15. WHat is the direction of force between two parallel conductors carryin...

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  16. Derive an expression for the torque acting on a rectangular current ca...

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  17. Derive an expression for the torque acting on a rectangular current ca...

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  18. Derive an expression for the torque acting on a rectangular current ca...

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  19. A rectangular loop of metallic wire is of length a and breadth b and c...

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  20. Derive an expression for the torque acting on a rectangular current ca...

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  21. Derive an expression for the torque acting on a rectangular current ca...

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