A coil carrying a heavy current and having large number of turns mounted in a $N-S$ vertical plane and $a$ current flows in clockwise direction. A small magnetic needle at its cente will have its north pole in
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(b) When the plane of coil is in $\mathrm{N}$ $-S$ vertical plane and current is passed in clockwise direction, the magnetic field at the centre of coil due to current is directed East to West. Earth's magnetic fleld is south to North.
since the magnetic needle will be in the direction of resultant magnetic field, which will be in the $west-north$ direction.
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