How can I draw a series circuit?

Hint: A circuit can contain many components and the components can be
connected in series or parallel combination. In series combination, the components are connected one after the other while in parallel combination; the components are connected between two common points.

Complete answer:
A circuit contains a battery, switch, other appliances like resistors, capacitors, galvanometers, ammeters, voltmeters etc.
The appliances can be connected in two types of combination; the series combination or the parallel combination.
In a series combination, the appliances are connected one after the other having only one point in common. A series combination of resistors in a circuit is shown below

In a series combination, the current flowing through all the components is the same but the potential difference is different. The equivalent resistance in a series combination is calculated as –
$R={{R}_{1}}+{{R}_{2}}$
Here, $R$ is the equivalent resistance.
In a series combination, the equivalent is the sum of resistances and the equivalent resistance is greater than the greatest resistance.
Therefore, in a series circuit, the components are connected one after the other with only one point in common.
Additional Information: In a parallel circuit, the resistances are connected as shown in the figure below-

In parallel combination the potential drop on each resistance is the same but the current flowing through each is different. The equivalent resistance is given by-
$\dfrac{1}{R}=\dfrac{1}{{{R}_{1}}}+\dfrac{1}{{{R}_{2}}}$

Note:
The resultant combination of capacitors is analogous to the resistors. The ohm’s law gives us the relation between current, potential drop and resistance in a circuit. According to the ohm’s law, the resistance is directly proportional to the potential drop but inversely proportional to the current in the circuit.