Week 12 - Telecommunication and Networks - Power Supply

What is a power supply in an electronic device?

• A part that stores energy in a magnetic field, like an inductor — not a power supply itself

• A device that provides electrical energy to at least one electric load

• A switch that cuts off current, which is a different component (e.g., a breaker)

• A ring-shaped core, such as a toroid, used in transformers but not a power supply

Why do some devices need a regulation system?

• To make them smaller — size is unrelated to voltage regulation

• To turn them on and off — that’s the job of switches or controllers

• To keep the voltage constant, or near constant — ensuring safe and stable operation

• To block unwanted signals — that’s typically handled by filters, not regulation systems

What shape can an inductor be?

• Only round, like a circle or sphere — incorrect, inductors can have multiple shapes

• Round or square — inductors come in various shapes depending on design needs

• Only square, with four straight lines of the same length — also incorrect

• Only a ring with a hole — describes a toroidal inductor, but not the only type

What controls transistor switching in modern devices?

• • A hard switch

• • A filter

• • A linear power supply

• • A microprocessor

What does a voltage inverter do differently from a switching supply?

• It takes low voltage and turns it into high voltage — a key function of inverters, especially DC to AC or step-up types

• It moves from "off" to "on" to save energy — describes how a switching supply operates

• It uses a linear regulator — unrelated to inverters; linear regulators are a different type of power control

• It blocks dirt from the circuit — not a function of either device

Match the term to its definition

• • Toroid

• • Provides electrical energy to at least o

• • Inductor

• • Stores energy in its magnetic field

• • Power supply

• • To gather together

• Congregated

• In the shape of a ring with a circular hole in the center

Match the part to where you find it

• • Electrolytic capacitors

• • After the AC line in a switching supply

• • Filter

• • Near the power supply area

• • Microprocessor

• • Controlling transistor switching

• • Hard switch

• • In some older AC devices

• Match the power supply type to its feature

• • Voltage inverter

• • Uses a linear regulator to set voltage

• • Linear power supply

• • Takes low voltage and turns it into high voltage

• • Switching supply

• • Moves back and forth from "off" to "on"

Match the term to its description

• • Filter

• • Lets some things pass through while blocking others

• • Square

• • D) Made up of four straight lines of the same length

• • Round

• • In the shape of a circle or sphere

• • Regulation system

• • Makes sure voltage is constant, or near constant

10. Put the steps of electricity flow in a switching supply in the correct order

• • Reaches the electrolytic filter capacitors

• • Comes from the AC line

• • Passes through many parts

• • B) Travels through a line filter