Which statement describes a DC generator property?

Which statement describes a DC generator property?

• A. Produces AC voltage
• B. Converts AC to DC
• C. Low voltage at low RPM
• D. Load through brushes

Answer: (D)

The key idea is how a DC generator delivers current to the outside circuit. The armature windings rotate and generate current, but the external circuit sees a direct current because the commutator and brushes direct the current in one direction as the machine spins. The brushes are the contact points that transfer this current from the rotating commutator to the stationary load, so the load is connected through the brushes. That’s why this property is correct: the load is carried out through the brushes to obtain DC. The other statements don’t describe how a DC generator provides its output: it doesn’t produce AC at the terminals, it isn’t converting external AC to DC, and while voltage does vary with speed, the defining characteristic is the brush-and-commutator path delivering DC.

The key idea is how a DC generator delivers current to the outside circuit. The armature windings rotate and generate current, but the external circuit sees a direct current because the commutator and brushes direct the current in one direction as the machine spins. The brushes are the contact points that transfer this current from the rotating commutator to the stationary load, so the load is connected through the brushes.

That’s why this property is correct: the load is carried out through the brushes to obtain DC. The other statements don’t describe how a DC generator provides its output: it doesn’t produce AC at the terminals, it isn’t converting external AC to DC, and while voltage does vary with speed, the defining characteristic is the brush-and-commutator path delivering DC.