Физика_10 сынып_Қосымша 3

Transformers

Transformers are used to ________   ____ or step down ______. They only work on AC because an ________ current in the primary coil causes a constantly alternating _________ _______. This will  “__________” an alternating current in the secondary coil.

Words: alternating, magnetic field, induce, step up, voltage

__________________________________________________________________

Transmission of electrical power

If electricity companies transmitted electricity at 220 volts through overhead power lines there would be too much _________ loss by the time electricity reaches our homes.  This is because the current is __________.  To overcome this they use devices called transformers to “step up” the voltage onto the power lines.  They then “________ _______” the voltage at the end of the power lines before it reaches our homes.  This way the voltage is ________ and the current and power loss are both _________.

Transformers

Transformers are used to ________   ____ or step down _________. They only work on AC because an ________ current in the primary coil causes a constantly alternating _________ _______. This will  “__________” an alternating current in the secondary coil.

Words: alternating, magnetic field, induce, step up, voltage

__________________________________________________________________

Transmission of electrical power

If electricity companies transmitted electricity at 220 volts through overhead power lines there would be too much _________ loss by the time electricity reaches our homes.  This is because the current is __________.  To overcome this they use devices called transformers to “step up” the voltage onto the power lines.  They then “________ _______” the voltage at the end of the power lines before it reaches our homes.  This way the voltage is ________ and the current and power loss are both _________.

Words – step down, high, power, low, high