Chapter 10 Transformer Basics

What does a transformer do?

• changes the color of electricity

• makes electricity stronger or weaker

• stores electricity

• increases the power of stations

What does a transformer change?

• the speed of electricity

• the direction of electricity

• the amount of voltage in electricity

• the color of electricity

What   are   the   two   main   parts   of   a   transformer?

• copper wire and metal box

• primary coil and secondary coil

• power source and ground

• power coil and neutral coil

  Which   part   of   the   transformer   takes   in   electricity?

• primary coil

• secondary coil

• neutral coil

• grounding coil

What   happens   when   a   transformer   increases   the   voltage?

• the current stays the same

• the current gets bigger

• the current gets smaller

• the electricity gets stored

What   does   the   secondary   coil   in   a   transformer   do?

• receives electricity and sends it out at a different voltage

• protects the transformer from damage

• increases the current

• reduces the voltage to zero

  What   is   true   about   how   well   a   transformer   works?

• a transformer should waste a lot of energy

• a good transformer wastes less energy

• the more energy a transformer wastes, the better it works

• efficiency doesn't matter in a transformer

What   type   of   transformer   is   most   often   used   at   power   stations?

• step-up transformer

• step-down transformer

• constant-current transformer

• control transformer

What   is   the   main   job   of   a   step-up   transformer?

• reduces voltage for home use

• increases voltage for long-distance transmission

• changes the flow direction of electricity

• controls the speed of electricity

  What   kind   of   transformer   is   used   to   make   electricity   safe   for   use   in   homes?

• step-up transformer

• step-down transformer

• constant-current transformer

• potential transformer