Transformers

A transformer has:

• primary and secondary windings, both of which are considered inputs

• a primary winding used as an output and a secondary winding used as an input

• primary and secondary windings, both of which are considered outputs

• a primary winding used as an input and a secondary winding used as an output

Tags

NGSS.HS-PS3-3

A Transformer______________. Select ALL that apply.

• Converts DC to AC to smaller electrical devices.

• Steps up or down AC Voltages.

• Converts AC to DC to smaller electrical devices.

• Steps up or down DC Voltages.

Tags

NGSS.HS-PS3-3

Increasing the number of turns of wire on the secondary of a transformer will:

• decrease the secondary current

• increase the number of turns of wire on the primary

• increase the secondary current

• have no effect on the secondary current

Tags

NGSS.HS-PS2-5

The working principle of a transformer is

• Resistance

• Capacitance

• Self Induction

• Mutual Induction

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

In a step-down transformer:

• Both Current and Voltage decrease

• Both Current and Voltage increase

• Voltage decreases, Current increases

• Voltage increases, Current decreases

Which coil has more turns in a step-down transformer?

• Primary Coil

• Secondary Coil

• Both have an equal number of turns

The most suitable material for the core of a transformer is

• air

• plastic

• iron

• cardboard

Tags

NGSS.HS-PS2-5

The power IN a transformer should equal the power OUT of a transformer. Which formula represents this?

• V=IR

• P=VI

Tags

NGSS.HS-PS3-3

Core losses typically result in:

• heat

• cold

• frequency changes

• higher efficiencies

Tags

NGSS.HS-PS3-4

The primary loop is connected to the ______ while the secondary loop is connected to the _____.

• source, load

• load, source