Unit 3 Exam Review

What is the turns ratio for a transformer having 50 primary turns and 5,000 secondary turns?

Device for converting 3-phase current?

American household current frequency?

Ohm's Law is represented as?

True or false: Transformers use DC efficiently.

Unit of electric current?

The efficiency of a transformer is affected by (select all that apply)

Purpose of grounding?

What affects electromagnetic field magnitude?

What is a material's ability to attract iron called?

True or false: Diodes allow bidirectional flow.

What is a closed pathway of wires called?

Unit of electrical charges (SI)?

Single-phase full-wave rectified current has:

What does a step-up transformer increase?

Property that impedes electron flow?

Which device opens a circuit?

What is the voltage by a transformer receiving 110V and 10 turns in the primary side and 50 turns in the secondary?

Glass is a good conductor?

Study of stationary electric charges?

movement of some electrons of an uncharged metallic object as it is brought into the electric field of a charged object

Autotransformer uses self-induction?

With mutual induction, to induce voltage in the secondary coil, there must be:

Purpose of step-down transformer?

Which of the following is explained as the flow of electrons along a conductor?

If a current of 0.5 A flows through a conductor and has a resistance of 12 ohms, the voltage will be:

True or false: Rheostat is an adjustable resistor.

What stores charge momentarily?

What allows electron movement?

True or false: Ripple affects x-ray consistency.

What does a step-up transformer do?

What does a diode allow?

True or false: A battery produces AC.

What converts mechanical to electrical energy?