Question

There are 3.3V passing through an orange power supply cable, and there are 0.025 ohms of resistance in the orange wire. How much power is supplied to the orange wire by the power supply?

Answer 1

Using ohm's law that voltage = current x resistance then 3.3volts =x amps x 0.025 ohms then amps = 3.3/0.025= 132 amps. Amps or amperes is the unit of current and 1 amp will flow through 1 ohm under pressure of 1 volt in 1 second.

Answer 2

Power is calculated using the following rule:
Power = voltage x current
From Ohm's law:
Voltage = current x resistance ............> current = voltage / resistance
Therefore, the rule of power can be written as:
power = voltage x (voltage / resistance)
power = (voltage^2) / resistance

From the givens, we have voltage = 3.3 volts and resistance = 0.025 ohms.
Substitute in the equation to get the power as follows:
power = (3.3 ^2) / 0/025
power = 435.6 watt