The potential difference of 120 volts and 12 volts is 108 volts.
The potential difference has to be 12 Volts since the light bulb will use 12 Volts (or Joules per Coulomb!) of energy. Voltage has to be 0 when it reaches the negative electrode of the battery, so you know that the 12 Volts have to have been consumed by the bulb!
"Power (/Watts) = Current (/amps) * Potential Difference (/volts)" Therefore, power = 7 * 12 = 84 W
The voltage of 120 volts is more common that the lower voltage of 12 volts.
Ohms are used to measure resistance, and volts are used to measure potential difference -two completely-different quantities. You might as well be asking, "How many kilometres are there in 12 degrees Celsius?"
6 amps.
160 amps at 12v.
160 amps at 12v.
12 Volts DC
Given R=? I=12 ampere V=120 Volts equation I=V divided R Solution; R=12 ampere 120 Volts answer (10)
Potential is measured in volts. The potential at any point is always measured with respect to another point, such as (but not necessarily) earth. So, if the potential at point A measures, say, +12 V with respect to earth, and the potential at point B measures, say, -12 V with respect to earth, then the potential difference between points A and B is +12 V - (-12 V), or 24 volts.
An automobile cigarette lighter uses 12 Volts DC. A typical 120 Volt circuit would destroy the 12 volt lighter.
The amp hours capacity of a battery remains the same whether it is connected to a 12-volt DC load or a 120-volt AC inverter. So, the battery would still have 100 amp hours regardless of the inverter voltage.