generators and alternators

#1. An EMF is induced in a conductor rotating in a magnetic field by:

• Acapacitive reaction.
• Bthe reverse current relay.
• Celectro transmission.
• Delectro magnetic induction.

#2. Magnetic field strength is controlled by:

• Abattery bus bar current.
• Bcurrent in the field coil.
• Ccurrent in the armature.
• Dcurrent flow to the battery.

#3. If a conductor is placed in a magnetic field:

• Aan EMF is induced in the conductor.
• Ban EMF is induced in the conductor only when the conductor rotates.
• Cthe applied resistance assists the back EMF.
• Dan EMF is induced in the conductor only when the conductor is stationary.