Physics: Magnetism and Electromagnetism
33 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the ability of a magnet to attract materials that are magnetic in nature?

It has the ability to attract materials that are magnetic in nature.

Magnets only exist in pairs.

True (A)

What is the area around a magnet from which magnetic forces can be detected?

A magnetic field is the area around a magnet from which magnetic forces can be detected.

What is a magnetic field produced by an electric current?

<p>An electromagnet is a magnetic field produced by an electric current.</p> Signup and view all the answers

What is a coil of live wire that acts as a magnet?

<p>A solenoid is a coil of live wire that acts as a magnet.</p> Signup and view all the answers

What did Hans Christian Oersted demonstrate?

<p>Hans Christian Oersted demonstrated that a current-carrying wire caused a nearby magnetized needle to deflect.</p> Signup and view all the answers

What is the flow of electric charge past a point on an electric circuit?

<p>Electric current is the flow of electric charge past a point on an electric circuit.</p> Signup and view all the answers

Conventional current flow is from negative to positive terminal.

<p>False (B)</p> Signup and view all the answers

What did Michael Faraday demonstrate?

<p>Michael Faraday demonstrated the converse effect of magnetic fields.</p> Signup and view all the answers

Magnetic fields can be used to produce voltage in a close circuit.

<p>True (A)</p> Signup and view all the answers

What is current produced by changing a magnetic field?

<p>Induced current is current produced by changing a magnetic field.</p> Signup and view all the answers

What is the difference in a coil due to the changes in magnetic flux through it?

<p>Induced EMF (Electromotive Force) is the difference in a coil due to the changes in magnetic flux through it.</p> Signup and view all the answers

What is a length series of circles?

<p>A coil is a length series of circles.</p> Signup and view all the answers

What is used to measure small amounts of electric current?

<p>A galvanometer is used to measure small amounts of electric current.</p> Signup and view all the answers

What is used to measure voltage?

<p>A voltmeter is used to measure voltage.</p> Signup and view all the answers

What is used to measure resistance?

<p>An ohmmeter is used to measure resistance.</p> Signup and view all the answers

What is a device used for increasing or decreasing a voltage?

<p>A transformer is a device used for increasing or decreasing a voltage.</p> Signup and view all the answers

What converts mechanical energy into electrical energy?

<p>A generator converts mechanical energy into electrical energy.</p> Signup and view all the answers

What converts electrical energy into mechanical energy?

<p>An electric motor converts electrical energy into mechanical energy.</p> Signup and view all the answers

What is a large number of turns of insulated copper wire?

<p>A armature coil is a large number of turns of insulated copper wire.</p> Signup and view all the answers

What contributed in developing equations that showed the relationship between electricity and magnetism?

<p>James Clerk Maxwell contributed in developing equations that showed the relationship between electricity and magnetism.</p> Signup and view all the answers

What is an electromagnetic wave produced by?

<p>An electromagnetic wave is produced by a vibrating charge.</p> Signup and view all the answers

The speed of electromagnetic waves in a vacuum is always the same as the speed of light.

<p>True (A)</p> Signup and view all the answers

What did Michael Faraday show evidence of?

<p>Michael Faraday showed experimental evidence on how does parallel wires behave like a magnet.</p> Signup and view all the answers

What has the longest wavelength?

<p>Radio waves have the longest wavelength.</p> Signup and view all the answers

What has a smaller wavelength than radio waves?

<p>Microwaves have a smaller wavelength than radio waves.</p> Signup and view all the answers

What is used in RADAR?

<p>Microwaves are used in RADAR.</p> Signup and view all the answers

What can humans see?

<p>Humans can see visible light.</p> Signup and view all the answers

What can cause damage to living cells?

<p>Ultraviolet light can cause damage to living cells.</p> Signup and view all the answers

What is used for sterilization?

<p>Ultraviolet light can be used for sterilization.</p> Signup and view all the answers

What carries the most energy and has the shorter wavelength?

<p>Gamma rays carry the most energy and have the shorter wavelength.</p> Signup and view all the answers

Gamma rays can kill living cells.

<p>True (A)</p> Signup and view all the answers

What is the most dangerous wavelength?

<p>Gamma rays have the most dangerous wavelength.</p> Signup and view all the answers

Flashcards

Magnet

An object that attracts magnetic materials.

Magnetic Field

The area around a magnet where magnetic forces are felt.

Electromagnet

A magnet created by an electric current.

Solenoid

A coil of wire that acts as a magnet when current flows through it.

Signup and view all the flashcards

Oersted's Experiment

Showed a current-carrying wire affects a compass needle.

Signup and view all the flashcards

Electric Current

Flow of electric charge.

Signup and view all the flashcards

Conventional Current

Positive to negative terminal.

Signup and view all the flashcards

Faraday's Law

Changing magnetic fields create voltage.

Signup and view all the flashcards

Voltmeter

Measures voltage.

Signup and view all the flashcards

Transformer

Changes voltage in circuits.

Signup and view all the flashcards

Generator

Converts mechanical energy to electrical energy.

Signup and view all the flashcards

Electric Motor

Converts electrical energy to mechanical energy.

Signup and view all the flashcards

Electromagnetic Waves

Waves of vibrating electric and magnetic fields.

Signup and view all the flashcards

Radio Waves

Electromagnetic waves with the longest wavelength.

Signup and view all the flashcards

Microwaves

Electromagnetic waves shorter than radio waves.

Signup and view all the flashcards

Visible Light

Electromagnetic waves that humans can see.

Signup and view all the flashcards

UV Light

Electromagnetic waves that can harm living cells.

Signup and view all the flashcards

Induced Current

Current produced by changing magnetic field.

Signup and view all the flashcards

Induced EMF

Voltage difference in a coil due to magnetic flux change.

Signup and view all the flashcards

Coil

A collection of wire loops.

Signup and view all the flashcards

Galvanometer

Measures small electric currents.

Signup and view all the flashcards

Study Notes

Magnets

  • Magnets attract materials that are magnetic
  • Magnets always occur in pairs (north and south poles)
  • Like poles repel, unlike poles attract

Magnetic Field

  • Area around a magnet where magnetic forces can be detected

Electromagnet

  • Magnetic field produced by electric current

Solenoid

  • Coil of wire that acts as a magnet

Hans Christian Oersted

  • Demonstrated that a current-carrying wire causes a nearby magnetized needle to deflect

Electric Current

  • Electric charge flowing through a circuit

Conventional Current Flow

  • Positive to negative terminal
  • (Electron Flow: negative to positive terminal)

Michael Faraday

  • Demonstrated the converse effect: magnetic fields can be used to produce voltage in a closed circuit
  • Experimentally showed how parallel wires behave like magnets

Electromagnetic Waves

  • Produced by vibrating charges
  • Speed in a vacuum is constant and is the same as the speed of light

Radio Waves

  • Longest wavelength

Microwaves

  • Shorter wavelength than radio waves
  • Used in radar

Infrared

  • Shorter wavelength than microwaves

Visible Light

  • Can be seen by humans

Ultraviolet Light

  • Can damage living cells
  • Used for sterilization

X-Rays

  • Carry more energy and have a shorter wavelength than ultraviolet light
  • Can damage living cells

Gamma Rays

  • Carry most energy and have the shortest wavelength
  • Most dangerous; can kill living cells
  • Used in cancer treatment

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Description

Explore the fascinating concepts of magnetism and electromagnetism with this quiz. Learn about magnetic fields, electromagnets, and the contributions of early scientists like Hans Christian Oersted and Michael Faraday. Test your understanding of how electric currents relate to magnetic activities.

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser