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A straight wire of mass 200g and length ...

A straight wire of mass 200g and length 1.5m carries a current of 2A. To suspend it in a air by a uniform horizontal magnetic field, value of required magnetic field is…. T

A

`6.5`

B

`0.45`

C

`0.65`

D

`4.5`

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The correct Answer is:
B
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KUMAR PRAKASHAN-ELECTROMAGNETIC WAVES-BOARD.S QUESTION PAPER MARCH - 2020 (PART - A)
  1. Kichhoff's junction role represents…….

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  2. Two resistors when connected in series net resistance is 5 Omega and w...

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  3. A straight wire of mass 200g and length 1.5m carries a current of 2A. ...

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  4. Unit of Bohr magneton is …..

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  5. Current sensivity of galvanometer in inversely proportional to……

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  6. Frequency of cyclotron is independent of …….

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  7. A circular coil of a wire containing 100 turns each of radius 2cm carr...

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  8. Which one of the following represent Curie's law?

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  9. At the place, on the surface of the earth, ratio of horizontal and ver...

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  10. Meissner effect is observed in………substances.

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  11. Dimensional formula of mutual inductance is …….

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  12. The magnitude of the induced emf is equal to the time rate of change o...

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  13. Which one of the following is an equation of magnetic energy density?

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  14. A 15 mu F capacitor is connected to a 220V, 50Hz a.c source Value of c...

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  15. Electric quantity …………is equivalent to mechanical quantity, force cons...

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  16. In L-C capacitor oscillator at………. Time energy in capacitor and energy...

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  17. A power transmission line feeds input power at 3300V to a step down tr...

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  18. Dimension of 1/(mue) is same as dimension of…….

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  19. Frequency of FM radio band is from…….

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  20. To destroy cancer cells……. Are used.

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