Review of Resistors in Series and Parallel (Solved exercises and theory)
Summary of the theory on the main characteristics of series and parallel circuits.
Behavior of electric current in series and parallel circuits.
Calculations of equivalent resistor and potential difference for two or more resistors.
1) A lamp was designed to operate with nominal values of 60 W and 120 V. It is desired to connect this lamp to a potential difference of 220 V. What is the value of the electrical resistance of the resistor that must be connected in series with this lamp?
2) Consider the following circuit and determine:
The equivalent electrical resistance.
The intensity of the electric current in each resistor.
The potential difference across each of the resistors.
3) Three resistors with resistances R1 = 60 Ω, R2 = 30 Ω, and R3 = 20 Ω are connected in parallel and subjected to a potential difference of 120 V. Determine:
a) the equivalent resistance of the association.
b) the current intensity in each resistor.
c) the voltage across each resistor
4) In the circuit shown in the figure below, what is the current intensity i?
a) 3 A b) 5 A c) 6 A d) 7 A e) 8 A
5) Determine the current intensities i1 and i2 and the potential difference across each resistor.