* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Jeopardy Review (PowerPoint)
History of electrochemistry wikipedia , lookup
Magnetorotational instability wikipedia , lookup
Electric motor wikipedia , lookup
History of electromagnetic theory wikipedia , lookup
Maxwell's equations wikipedia , lookup
Electricity wikipedia , lookup
Induction heater wikipedia , lookup
Electromotive force wikipedia , lookup
Magnetic field wikipedia , lookup
Neutron magnetic moment wikipedia , lookup
Magnetic nanoparticles wikipedia , lookup
Magnetic monopole wikipedia , lookup
Friction-plate electromagnetic couplings wikipedia , lookup
Hall effect wikipedia , lookup
Magnetometer wikipedia , lookup
Induction motor wikipedia , lookup
Earth's magnetic field wikipedia , lookup
Electromagnetism wikipedia , lookup
Electric machine wikipedia , lookup
Superconducting magnet wikipedia , lookup
Scanning SQUID microscope wikipedia , lookup
Magnetic core wikipedia , lookup
Superconductivity wikipedia , lookup
Lorentz force wikipedia , lookup
Galvanometer wikipedia , lookup
Faraday paradox wikipedia , lookup
Multiferroics wikipedia , lookup
Eddy current wikipedia , lookup
Magnetoreception wikipedia , lookup
Magnetohydrodynamics wikipedia , lookup
Force between magnets wikipedia , lookup
Magnetochemistry wikipedia , lookup
Welcome to Physics Jeopardy Magnetic fields Right Hand Rules Motor Electro magnetic Induction Transformers 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 Final Jeopardy Question Magnetic Fields 100 pts If two magnets are attracted to one anther their poles must be? Back Magnetic field 100 pts Answer Opposite Back Magnetic field 200 pts Can a magnet ever have a single pole? Why or why not? Back Magnetic field 200 pts No, Poles are regions of strong magnetism on each end of the magnet, the magnetic field lines are continuous Back Magnetic field 300 pts What kind of material is a lodestone made of? Back Magnetic Field 300 pts Ferromagnetic Back Magnetic Field 400pts What causes a nail to become a temporary magnet? Back Magnetic Field 400 pts Answer The domains of the nail align themselves with a permanent magnet. Back Magnetic Field 500 pts What does a magnetic domain refer to? Back Magnetic Field 500pts Answer Small magnetic regions caused from electron spin Back Right hand rule 100pts X Determine the magnetic field of the wire with a current going into the page. Back Right Hand Rule 100 pts Clockwise Back Right hand Rule 200 pts A current flows west to east in a wire. Determine the direction a compass will point above the wire. Back Right Hand Rule 200pts Answer South Back Right Hand Rule 300 pts + What is the direction of the magnetic field Of the above electromagnet? Back Right Hand Rule 300 pts S S S Back N N Right Hand Rule 400 The direction that the force has on a current carrying wire is ___ the external magnetic field Back Right Hand Rule 400 pts Answer Perpendicular Back Right Hand Rule 500 pts 12.The force exerted on a current carrying wire depends on ___ &___& ___ Back Right and Rule 500 pts Answer F= BIL Magnetic field, Current, Length of wire Back Motor 100 pts The speed of a motor can be increased by increasing the _____? Back Motor 100 pts Answer Current Back Motor 200pts What is the principle behind the electric motor? Back Motor 200pts Answer A current carrying conductor placed perpendicular to a magnetic field will experience a force Back Motor 300pts What are the essential parts to a motor? Back Motor 300pts Answer Armature, Split rings, magnetic field, brushes Back A motor that rotates clockwise has a magnetic field going from left to right What are the poles on the red and blue bobbins as they rotate? Back Red and Blue top – North Red and Blue bottom - South Back Why must the coils be wound in opposite directions around the armature? Back The polarity of the two electromagnets must be opposite. Back Electromagnetic Induction 100pts What is the force on a 120 cm long wire perpendicular to a external magnetic field of .500 T with a current of 4.00 amps moving through the wire? Back 2.4 N Back Electromagnetic Induction 200pts How can a electric current be generated in a wire without a battery? Back Moved perpendicular across a magnetic field Back Electromagnetic Induction 300pts What does EMF depend on? Back B v l Magnetic field Velocity Length of wire Back Electromagnetic Induction 400pts The Max Emf will be induced in a wire moving in a magnetic field when the wire moves Back Perpendicular to the magnetic field lines Back Electromagnetic Induction 500pts What is the EMF for a .6m long wire is moved at right angles to the lines of force of a magnetic field whose strength is 0.3T at a speed of 2.0m/s The induced EMF in the wire is Back .36 V Back What is the difference between generators and motors? Back Motor converts electricity to mechanical energy Generators converts mechanical energy to electrical energy Back What parts of a DC generator convert the AC in the armature to the DC in the external circuit? Back The split rings and brushes Back A device consisting of a coil that is mechanically rotated in a stationary magnetic field is called? Back Generator Back In a transformer the primary coil is connected to the _________ and the secondary coil is connected to the __________ Back Primary ->Power supply Secondary -> load Back A step up transformer has a primary coil of 800turns and is connected to a 120 V source. How many turns Would be needed in the secondary coil to supply 60 V. Back 400 Coils Back When was the internet developed? Back 1960’s Back