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A straight wire of length l can slide o...

A straight wire of length l can slide on two parallel plastic rails kept in a horizontal plane with a separation d. The coefficient of friction between the wire and the rails is `mu`. If the wire carries a current I, what minimum magnetic field should exist in the space in order to slide the wire on the rails.

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The minimum magnatic force of the body
` mumg = iBL`
` B= (mumg)/(il) .
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HC VERMA ENGLISH-MAGNETIC FIELD-Exercises
  1. Two metal strips, each of length, each of length l, are clamped paral...

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  2. A matel wire PQ of mass 10g lies at rest on two horizontal metal rails...

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  3. A straight wire of length l can slide on two parallel plastic rails k...

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  4. A circular loop of radius a, carrying a current I, is placed in a tow ...

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  5. A ring of radius 0.1m is made out of thin metallic wire of area of cro...

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  6. The magnetic field existing in a region is given by vecB =B0(1+(x)/(l)...

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  7. A conducting wire of length l, lying normal to a magnetic field B, mo...

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  8. A currrent I is passed through a silver strip of width d and area of...

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  9. A particle having a charge of 2.0X10^(-8) C and a mass of 2.0X10^(-10...

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  10. A proton describes a circle of radius 1 cm in a magnetic field of stre...

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  11. An electron having a kinetic energy of 100eV circulates in a path of r...

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  12. Protons having kinetic energy K emerge from an accelerator as a narrow...

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  13. A charged particle is accelerated thrught a potential difference of 12...

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  14. Doubly ionized helium ions are projected with a speed of 10kms^(-1) in...

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  15. A proton is projected with a velocity of 3X10^6 m s ^(-1) perpendicula...

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  16. (a) An electron moves along a circle of radius 1m in a perpendicular m...

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  17. A particle of mass m and positive charge q, moving with a uniform velo...

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  18. A charged particle (q, m) enters perpendicular in a uniform magnetic f...

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  19. A narrow beam of singley charged carbon ions, moving at a constant ve...

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  20. Fe^+ ions are accelerated through a potential difference of 500 V and ...

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