Tuesday, February 16, 2010
RESISTANCE
-The components in a circuit resists the flow of electrons thus, the current does not flow easily in a circuit.
-The resistive force is called the resistance (R) of an object.
-The resistance of a component is the ration of the potential difference across it to the current flowing through it.
-S.I unit for resistance is ohm (Ω)
Varying Resistance in an electric circuit
Fixed Resistors
-Specially made resistors of a specific value.

Variable resistor (Rheostats)
-Used to vary the current flowing in a circuit, by the varying resistance.
-Used to vary the current flowing in a circuit, by the varying resistance.

4:35 PM