On which principle is electricity generated in a power plant?

Explain the Right-Hand Thumb Rule and the Maxwell's Corkscrew Rule to determine the direction of the magnetic field due to a current-carrying conductor.

When is the force experienced by a current-carrying conductor placed in a magnetic field the largest?

Explain with the help of a labelled diagram the distribution of magnetic field due to a current through a circular loop. Why is it that if a current-carrying coil has $n$ turns,the field produced at any point is $n$ times as large as that produced by a single turn?

Why does a magnetic compass needle pointing North and South in the absence of a nearby magnet get deflected when a bar magnet or a current carrying loop is brought near it? Describe some salient features of magnetic lines of field concept.

State the direction of the magnetic field in the following case: