Electric Power

Complete the table Voltage

(v)Current

(A)Resistance

(ohms)Power

(watt)

Kettle

Dryer(red)

Dryer(white)

Filter

Why do you have different powers for the dryer

( red - white )?

What is the definition of power?

2 -Power = voltage^2 /resistance

1 -Power = energy / time

3 -Power = current X voltage

4 -Power = current ^2 X resistance

Complete the table Voltage

(v)Current

(A)Resistance

(ohms)Power

(watt)

Kettle 220-240-------------1950

Dryer(red)

220-240---------------1700-2000

Dryer(white)

220-240---------------650

Filter 220-240---------------8.5

Complete the table Voltage

(v)Current

(A)Resistance

(ohms)Power

(watt)

Kettle 220-2408.86-8.121950

Dryer(red)

220-2407.7-8.31700-2000

Dryer(white)

220-2402.95-2.7650

Filter 220-2400.038-0.0358.5

Complete the table Voltage

(v)Current

(A)Resistance

(ohms)Power

(watt)

Kettle 220-2408.86-8.1224.81950

Dryer(red)

220-2407.7-8.328.51700-2000

Dryer(white)

220-2402.95-2.774.5650

Filter 220-2400.038-0.03557898.5

Qs.Q1 : if I = 2 A V = 5 v find P? =

Q2 : if P = 22 watt V = 15 v find I? =

Q3 : if I = 0.54mA R = 5 ohms find P? =

Q4 : if W = 33 J t= 3s find P? =

Q5 : if P = 220 watt t = 4min find W? =

Did you see this object ? And Where?

The fused plug

What is the function of fused?