Download Ohm’s Law and Electrical Power

OHM’S LAW
“Provided the physical conditions, such as
temperature, are kept constant, the resistance
is constant over a wide range of applied
potential differences, and therefore the
potential difference is directly proportional to
the current flowing.”
𝑽 = 𝑰𝑹
OHMIC DEVICES (OHMIC CONDUCTORS)
• Those devices which obey the linear
relationship of Ohm’s Law at all potential
differences
• Temperature of this device will NOT
change due to the heating effect of the
current as voltage changes
• No device is truly completely Ohmic—it’s
an ideal resistor
•Most devices would be considered
Non-Ohmic
Non-Ohmic vs. Ohmic devices—Current vs. Voltage