Lesson 9

Section 3 — Electricity in the home
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Section 3 — Electricity in the home

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Section 3 — Electricity in the home
This lesson
  • Recap
  • Electricity in the house
  • Kilowatt hour
  • Power

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Recap

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What type of circuit is used for in group in a fusebox?

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What type of circuit is used for in group in a fusebox?

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Voltage & number of coils
UsUp=NsNp
Up :voltage primary coil
Us : Voltage secondary coil
Np : Number of turns primary coil
Ns: Number of turns secondary coil
UpNs=UsNp

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Electric socket
Potential difference (voltage) 
= 230 Volt

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Learning objectives section 3

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Kilowatt hour
E=Pt
E=1kW1h
E=1kWh

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Kilowatt hour
E=Pt
E=1kW1h
E=1kWh
E=Pt
E=1000W3600s
E=3.6106J=3.6MJ

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Exercise
(In kWh)
E=Pt

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Exercise
(In kWh)

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Calculating the total power over a group

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P=UI

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P=UI
SJ=CJSC

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P=UI
SJ=CJSC

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Calculating the total power of a group?
Ptot=P1+P2+P3+...

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Calculating the total power of a group?
Ptot=P1+P2+P3+...
Ptot=UtotItot

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Calculating the total power of a group?
Ptot=UtotItot

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Calculating the total power of a group?
Ptot=UtotItot
Utot=U1=U2=U3=...

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Calculating the total power of a group?
Ptot=UtotItot
Utot=U1=U2=U3=...
Itot=I1+I2+I3+...

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Calculating the total power of a group?
Ptot=UtotItot
Utot=U1=U2=U3=...
Itot=I1+I2+I3+...
Ptot=Utot(I1+I2+I3+...)

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Calculating the total power of a group?
Ptot=UtotItot
Utot=U1=U2=U3=...
Itot=I1+I2+I3+...
Ptot=Utot(I1+I2+I3+...)

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Homework
Section 3 — Exercise 

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