A long straight wire carries a current along the ‘z’ axis. One can find two points in the planeperpendicular to the conductor such thati) The magnetic fields are equalii) The direction of the magnetic fields are perpendiculariii) Magnitudes of the magnetic fields are equal iv) The field at one point is opposite to that at the other point

# A long straight wire carries a current along the 'z' axis. One can find two points in the planeperpendicular to the conductor such thati) The magnetic fields are equalii) The direction of the magnetic fields are perpendiculariii) Magnitudes of the magnetic fields are equal iv) The field at one point is opposite to that at the other point

1. A

Only i & ii are true

2. B

Only ii & iii are true

3. C

Only ii, iii & iv are true

4. D

Only iii & iv are true

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### Solution:

We can observe around a current carrying conductor

i) the direction of magnetic field are perpendicular to each other and magnitudes may be equal  also we can find the field at one point is opposite to that at the other point as shown in figure.

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