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Ohms Law
(DC Current)
Voltage (volts) Power (watts)
Current (amps) = -------------------- = -----------------
Resistance (ohms) Voltage (volts)
Power (watts)
Current (amps) = Square root of --------------------
Resistance (ohms)
Voltage (volts) =
Current (amps) x Resistance (ohms)
Voltage (volts) =
Power (watts) / Current (amps)
Voltage (volts) =
Square root of Power (watts) x Resistance (ohms)
Power (watts) =
Current (amps)2 x Resistance (ohms)
Power (watts) =
Voltage (volts) x Current (amps)
Power (watts) =
Voltage (volts)2 / Resistance (ohms)
Resistance (ohms) =
Voltage (volts) / Current (amps)
Resistance (ohms) =
Power (watts) / Current (amps)2
Ohms Law
(AC Current)
Voltage (volts)
Current (amps) = --------------------
Impedance (ohms)
Voltage (volts) =
Current (amps) x Impedence (ohms)
Impedence (ohms) =
Voltage (volts) / Current (amps)
Frequency and
Wavelength
Frequency (kilohertz)
= 300,000 / wavelength (metres)
Frequency (megahertz)
= 300 / wavelength (metres)
Wavelength (metres) =
300,000 / frequency (kilohertz)
Wavelength (metres) =
300 / frequency (megahertz)
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