19-06-2020

• Natuurkunde / Scheikunde
• Middelbare school
• vwo
• Leerjaar 2

Ohm's law

&

Power

(§12.3 t/m §12.5)

What have you learned about
electricity?
What have we covered.

Why is it important for us to talk about electricity?

Ohm's law

R=​I​​U​​

Ohm's law

• R: resistance(Ohm, Ω)
• U: potential difference (volts, V)
• I: current (ampere, A)

R=​I​​U​​

Ohm's law

R=​I​​U​​

Power

Power

Power

Power

• the amount of energy transferd per second.
• Joule per second.
• Unit: Watt

Power

P=I⋅U

Power

• P: Power (Watt, W — J/s)
• I: Current (Ampere, A)
• U: Potential difference (Volt, V)

P=I⋅U

Power

P=I⋅U

​S​​C​​

​C​​J​​

Power

P=I⋅U

​S​​C​​

​C​​J​​

​S​​J​​

The formula's we covered.

Ohm's law:

Power: 

P=I⋅U

R=​I​​U​​

Excerise

A Dutch socket has a potential difference of 230 V. If a current of 10 Ampere flows through the socket what is the power of the socket? 

Exercise — answer

A Dutch socket has a potential difference of 230 V. If a current of 10 Ampere flows through the socket what is the power of the socket? 

Answer