Electricity - Transporting electrical energy

16 important questions on Electricity - Transporting electrical energy

What is energy loss?

Electrical energy that is lost during transport because of a proportion of the energy that get converted into heat.

What can you do to limit energy losses?

Use the highest voltage possible.

What is mains voltage?

Effective voltage of 230 V
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What is a frequency?

The number of times per second that the wave patern of the voltage repeats.

What happens if the positive and negative terminals are swapped?

The polarity of the voltage changes  from positive to negative .

What is an effective voltage?

The average value of alternating voltage.

What is a transformer?

A device that can convert  an alternating voltaga  into a higher or lower alternating voltage using two coils and a soft iron core.

What is primary coil?

The part of a transformer that the elctrical energy from the mains goes into.

What is secondary coil?

The part of a transformer that provides electrical energy to an appliance.

What is an electro magnet?

An electrical component such as a coil that behaves like a  magnet when an electric current is passed through it.

What is the ideal transformer?

It is an imaginary in which no electrical energy is lost: the power consumption is the same as the output.

What are the numbers of turns in the primary and secondary coil called?

NpNs

What has happened if Ns > Np?

The voltage has been transformed upwards

What has happened if Ns < Np?

The volatge has been transformed downwards.

What is the rule when the voltages and the number for terms are in the same ratio?

Up / Us = Np / Ns

What is the formula if the power drawn by the primary coil of and idear transformer, is the same as the power supplied by the secondary coil?

Pp = Ps or Up * Ip = Us * Is

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