Why does the axle need to be rotated in a turbine generator? Inside a turbine a wire rotates between the poles of a magnet, i.e. rotating inside the magnetic field, so that the field forces the electrons in the wire to move and generate current. But why does the conductor wire need to rotate between the two poles of the magnet? Why can't it generate current when the wire is stationary?
 A: You are having some misconceptions


*

*Wire(more pricisely axle) is not rotated between magnetic field in a turbine generator.Wire(more pricisely axle) is used to rotate an coil (present between magnetic fields) present in generator.

*Magnetic field itself can not force electrons in a conductor to move untill it is at rest.

*We need an moving conductor so that a force can be applied on electrons by magnetic field. (F=qv*B here q is charge on electron, v is velocity of conductor and B is magnetic field)

*A turbine and generator are two different things.

*Turbine just rotates that wire but to produce electric current you have to connect the ends of that wire ( better to say it axle not wire )to an generator.

*A generator converts that rotating mechanical energy into electrical energy 

*A generator have magnets not the turbine.
8.Axle ( you like the word wire) does not contain current.
Now why do you need to rotate that turbine is because generator requires mechanical energy 
How does it do it ?
As follows
According to faraday's law of electromagnetic induction current will be induced in the circuit (coil) if magnetic flux through the circuit(coil) changes with time .
     If you do not rotate the turbine then there will be no flux change and hence no emf or current induced.
Remember you can also change the flux by 
1.Keeping the circuit stationary and moving the magnets 
2. Changing the shape of coil (circuit) so that area changes
3.changing magnitude of magnetic field
4.many more
