FIXED RESISTOR

Fixed resistors

are a type of resistor that has a fixed resistance value which does not change.

Fixed Resistors

They are key components in various electronic circuits and systems, performing a range of critical functions to ensure their stable operation.

FIXED RESISTORS

Its main purpose is to limit the amount of electrical current flowing through a circuit.

FIXED RESISTORS

T OR F
By introducing this into the circuit, they prevent an overload of current which could potentially damage other components or even cause a fire.

FIXED RESISTORS

They help regulate the electrical charge, keeping the overall system safe and operational.

false, common

T OR F
Fixed resistors are uncommon in electronics, used in almost every device that requires control of electrical current

fixed resistors

They can be found in everything from simple household appliances to complex scientific instruments and industrial machinery

1. voltage regulation’

2. current limiting

2 main application of fixed resistors

voltage regulation

application of fixed resistors.
in a series circuit, fixed resistors can be used to distribute voltage among different components. By precisely controlling the resistance value, the voltage drop across each component can be set according to the needs of the system.

current limiting

• Limit the amount of current flowing through a circuit.

• This is essential for protecting sensitive components from excessive currents.

what application of fixed resistors?

Fixed resistors

They play an integral role in the world of electronics, helping to maintain the stability and safety of various electrical systems.

false, available

t or f
Fixed resistors are not available in different resistance values, power ratings, and tolerance levels.

Resistance value

This is the amount of resistance the resistor provides to the flow of current, expressed in ohms.

Power rating

This is measured in watts, indicates the maximum amount of power the resistor can safely dissipate as heat.

tolerance

This specifies the variation in resistance that a resistor may have from its nominal value, expressed as a percentage.

COLOR CODING

is a method used to indicate the resistive value, tolerance, and temperature coefficient of resistors with low wattage rating because of their small size.

COLOR BANDS

are used because they can be easily and cheaply printed on a small electronic component.

TRUE

T OR F
The bands are read from left to right

tolerance

This is the percentage of error between the actual measured resistive value and the stated value. This is due to the manufacturing process, and it is expressed as a percentage of its preferred value

Kirchhoff’s First Rule – Junction Rule

what rule?

the algebraic sum of the currents is zero.

Kirchhoff’s First Rule – Junction Rule

There is no accumulation of charges at any point, that is, the sum of the currents entering any junction is equal to the sum of the currents leaving the junction.

Kirchhoff’s Second Rule – Loop Rule

what rule?

the algebraic sum of the IR (voltage) drops is equal to the algebraic sum of the EMFs.

Kirchhoff’s Second Rule – Loop Rule

WHAT RULE?

In a closed loop, whatever energy is supplied by a voltage source, the energy must be transferred into other forms by the devices in the loop, since there are no other ways in which energy can be transferred into or out of the circuit.

true

T OR F
In Loop Rule, you must identify a closed loop and decide in which direction to go around it, clockwise or counterclockwise.

false, positive

t or f
The voltage is negative if the direction of the loop is going in the direction of the conventional current

true

t or f
tif the direction of the loop is going in the opposite direction of the conventional current, voltage is negative.

R-C Circuits

This is an electrical circuit that is made up of the passive circuit components of a resistor (R) and a capacitor (C) and is powered by a voltage or current source

R-C Circuits

is made up of a resistance R in ohms and a capacitance C in Farads.

1. capacitor

2. resistor

The —— stores energy and a ——- connected with it controls the capacitor’s charging and discharging.

resistor-capacitor combination

A ——— (sometimes called an RC filter or RC network) is a resistor-capacitor circuit.