Generator harder to crank if there is current.

More current, more harder.

Whah?

What's current?

That's a measure of current.  What does that mean?

What gotta be happening to get charge / time interval?

Why does that make it harder to crank?

Why charge gotta be pushed?

What pushes charge?

Cranking a current thru a capacitor, cranking at constant rate, it gets easier and easier to turn the crank.  Why?

Why less current in the wire?

Why less field and less voltage?