W=V x A Watts equal volts times amps.
Current = voltage divided by resistance
Ohm's law can be used to find the current, voltage or resistance in a electrical circuit. The formula is V=IR where 'V' is the Voltage measured in Volts (V), 'I' is the current measured in Amperes (A) And 'R' is the resistance, measured in Ohms (Ω)
It is used in Science: Energy and Power.
Light Emitting Diodes (LED) solid state devices are current dependant. LED have ratings for the max current allowed to the LED device. A typical current allowed to a LED is 20ma. Ohms Law is used to determine the resistance required to limit the current to your desired current. The formula is used in this manner: E=12VOLTS the desired current is I = 20ma. R = E/I = 600 ohms. Where E=2 volts dc and I=20ma R= E/I = 100 Ohms.
Ohms measure electrical resistance. The resistance in ohms is the voltage divided by the current.
Ohms are the unit of resistance you find in Ohms LAw which says Volts = Amps x Ohms. You can get a voltage drop across a resistance, but would have to know what current is being used and you would have a potentiometer in effect. You are not "converting 12V" to 10V, your are essentially loosing two volts through a resistor.
ohms is a measure of resistance(R) in a circuit. Watts is a measure of the power(P), in this case lets assume it is the power used by the resistive element (lamp, heater etc). Power(watts)=Current(Amps)x Current(amps) x Resistance(ohms) or Resistance (ohms)=Power(W)/(current x current)
Amps, or amperes, are a measure of electrical current; ohms are a measure of electrical resistance. Both are widely used in physics.
Your question is incomplete. What you meant to say is "What is the voltage drop of a 1.2K Ohm resistance?" (an Ohm is a unit of measurement, a resistor or resistance is measured in ohms.) The answer is, it depends on the current flowing through the circuit. Use the formula V=IR where V is the voltage, I is the current in amps, and R is the resistance in ohms.
Ohm's Law: Resistance is voltage divided by current 110 volts divided by 0.4 amperes is 275 ohms.
Ohms are used to measure electric resistance.
It is a passive electrical device with a resistive value of 1000 ohms, used for limiting current or dropping voltage.
They are the three components that are used in Ohms law. Knowing any two will lead to the calculation of the third.