Electric circuits and networks: Basic Introduction to electric circuits, Resistance & Resistivity, Capacitors, Inductors, DC circuit theorems and AC circuits.
Resistors perform two basic functions in a circuit: they limit current flow and set voltage levels within a circuit.
We have various kinds of resistors e.g. fixed resistors, variable resistors, digitally adjustable resistors, photoresistors, fusible resistors, etc.
Generally, resistors can … Read more
Let’s consider a signal turn coil rotating freely at a constant angular velocity symmetrically between the poles of a magnet as illustrated below:
The ends of the loop are terminated in … Read more
In resistive elements the current and voltage are in phase.
The laws that determine the currents and voltage drops in DC networks:
In addition to the above laws, we have several circuit theorems used to solve problems … Read more
Resistors perform two basic functions in electronics:
These two Resistor features of current limiting and voltage setting are implemented in various ways in electronics as listed below:
Inductance is the property of a circuit whereby there is an emf induced into the circuit by the change of flux linkages produced by a current change. When the emf is induced in the same circuit as … Read more
A capacitor is an electrical device that is used to store electrical energy. A capacitor consists of two metal plates separated by an insulator called a dielectric. It stores electricity in the form of an excess … Read more
The figure below shows three resistors R1, R2, and R3 connected end to end i.e. in series with a battery source of V volts.
Since the circuit is closed, a … Read more
We know that a current passing through a resistance has a heating effect, the magnitude of which we measure in watts, that is power is given by
This shows that power (or heat) dissipated in a resistance is proportional to … Read more
The resistance of an electrical conductor depends on 4 factors, namely:
The resistance, R, is directly proportional to length L … Read more
