Physics: Magnetism and Electromagnetism

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

True

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

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

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

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

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

<p>False</p> Signup and view all the answers

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

<p>True</p> Signup and view all the answers

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

<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

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

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

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

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

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

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

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

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

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

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

<p>True</p> Signup and view all the answers

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

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

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

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

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

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

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

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

<p>True</p> Signup and view all the answers

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