This lesson I worked out where I was going wrong with my previous circuits. I wasn’t calculating my voltage. I hadn’t realised that with 4 LED’s all needing about 1.4 volts to light and a 9V battery that they might blow or need a resistor. I did some research on OHM’s law and found out OHM’s law is a way of describing the relationship between the voltage, resistance and current using maths. The formula for this law is:
V=RI
- V is the symbol for voltage
- I is the symbol for current
- R is the symbol for resistance
By the end of the lesson I worked out what resistor I needed:
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