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Charge & Current

Akoranga 11 Mahi Tuatahi

  1. What are some common carriers of charge?

Whakatika


Conductors

A conductor is a material through which charge can move freely.

Source

Source


Insulators

A material through which electrons cannot easily flow




Tūhura|Investigation

  1. Sharpen the pencil at both ends so the lead is exposed
  2. Connect the two wires to the DC red/black plugs and then to either end of the resistor
  3. Turn the voltage to 12V and switch on the power pack!
  4. Turn off the power pack and then do the same thing with the pencil

Current


\begin{aligned} & I = \frac{q}{t} \newline & \text{I = current measured in what?} \newline & \text{q = charge measure in what?} \newline & \text{t = time measured in what?} \end{aligned}


Pātai

  1. If $10A$ flows through a wire, how much charge passes a point in $5s$?
  2. A total charge of $0.12C$ passes a point in $5s$. What is the current?
  3. $0.02C$ of charge passed through a resistor in 1 minute. What was the current?
  4. If the current is $0.3A$, how much charge will pass a point in 10 minutes?

What Direction Does Current Flow?


Conventional Current



Conventional Current