Relative Potential
Relative potential is the voltage of one point in a circuit with respect to that at another point (usually called…
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Duality between Series and Parallel Circuits.
There are certain peculiar pattern of relationship between series and parallel circuits. For example, in a series circuit, current is…
Example 3 (Worked Example on Equivalent Resistance)
In the circuit in figure 1 below, find the value of supply voltage V so that the 20Ω resistor can…
Example 2 (Worked Example on Equivalent Resistant).
Two resistors of values 1kΩ and 4kΩ are connected in series across a constant voltage supply of 100V. A voltmeter…
Example 1 (Worked Example on Equivalent Resistance)
Find the equivalent resistance of the circuit given in figure 1 below (a) between the following points (i) A and…
Equivalent Resistance
The equivalent resistance of a circuit (or network) between its any two points (or terminals) is given by that single…
Varistor (Nonlinear Resistor)
A varistor is a voltage-dependent metal-oxide material whose resistance decreases sharply with increasing voltage. The relationship between the current flowing…
Non-linear Resistors
Those elements whose V-I curves are not straight lines are called non-linear elements because their resistances are nor-linear resistances. Their…
Conductors, Insulators and Semiconductors
Conductors Atoms of a group of elements called metals are held together by a form of bonding. The type…
Electrons and Protons
Electrons The behaviour of electric circuit is to a very large extent dependent on the behaviour of electrons which…
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