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A long, straight wire carries a current ...

A long, straight wire carries a current along the z-axis. One can find two points in the x-y plane such that

A

Only i & ii are true

B

Only ii & iii are true

C

Only ii, iii & iv are true

D

Only iii & iv are true

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The correct Answer is:
C
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AAKASH SERIES-MOVING CHARGES AND MAGNETISM-EXERCISE-IA
  1. Two wires carrying

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  2. A square loop, carrying a steady current I, is placed in a horizontal ...

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  3. A long, straight wire carries a current along the z-axis. One can find...

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  4. A loosely wound helix made of stiff metal wire is mounted vertically w...

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  5. A current carrying loop in a uniform magnetic field will experience to...

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  6. Two very long, straight, parallel wires carry steady currents I and -I...

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  7. A rigid circular loop of radius r and mass m lies in the x-y plane...

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  8. A current carrying circular coil, suspended freely in a uniform extern...

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  9. A current loop in a magnetic field

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  10. A square loop ABCD, carrying a current I(2) is placed near and coplan...

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  11. In the above question, the acceleration of the rim will be?

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  12. A circular coil of n turns and area of crosssection A , carrying a cur...

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  13. A moving coil type of galvanometer is based upon the principle that a ...

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  14. The relation between voltage sensitivity (sigma(y)) and current sensit...

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  15. The best method to increase the sensitivity of a moving coil galvanome...

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  16. A conducting wire of given length is used to prepare the 'coil' of a m...

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  17. In a moving coil galvanometer a radial magnetic field is obtained with...

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  18. When a current is passed in moving coil galvanometer, the coil gets de...

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  19. The current that must flow through the coil of a galvanometre so as to...

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  20. To double the torque acting on a coil of n-turns, when placed in a mag...

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