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Welcome to Physics Jeopardy
Chapter 18
Final Jeopardy QuestionFinal Jeopardy Question
Magnetic fields
100
Electro magnetic InductionMotor
Transformers
500
400
300
200
100 100 100 100
200 200 200 200
300 300 300300
400 400 400 400
500 500 500500
Right HandRules
Back
Magnetic Fields100 pts
If two magnets are attracted to one anther
their poles must be?
Opposite
Back
Magnetic field 100 ptsAnswer
Back
Magnetic field 200 pts
Can a magnet ever have a single pole?
Why or why not?
No, Poles are regions of strong magnetism on each end of the magnet, the magnetic field lines are continuous
Back
Magnetic field 200 pts
What kind of material is a lodestone made of?
Back
Magnetic field 300 pts
Ferromagnetic
Back
Magnetic Field 300 pts
Back
Magnetic Field 400pts
What causes a nail to become a temporary magnet?
The domains of the nail align themselves
with a permanent magnet.
Back
Magnetic Field 400 pts Answer
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 rule100pts
X
Determine the magnetic field of the wire with a current going into the page.
Clockwise
Back
Right Hand Rule100 pts
Back
Right hand Rule200 pts
A current flows west to east in a wire. Determine the direction a compass will pointabove the wire.
Back
Right Hand Rule200ptsAnswer
South
Back
Right Hand Rule300 pts
+
What is the direction of the magnetic field
Of the above electromagnet?
Back
Right Hand Rule 300 pts
NSS
S N
Back
The direction that the force has on a current carrying wire is ___ the external magnetic field
Right Hand Rule 400
Perpendicular
Back
Right Hand Rule400 ptsAnswer
12.The force exerted on a current carrying
wire depends on ___ &___& ___
Back
Right Hand Rule500 pts
Back
Right and Rule500 ptsAnswer
F= BILMagnetic field, Current, Length of wire
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Motor 100 pts
The speed of a motor can be increasedby increasing the _____?
Back
Motor100 ptsAnswer
Current
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Motor200pts
What is the principle behind the electric motor?
Back
A current carrying conductor placed perpendicular to a magnetic field will experience a force
Motor200ptsAnswer
Back
Motor300pts
What are the essential parts to a motor?
Back
Motor300ptsAnswer
Armature, Split rings, magnetic field, brushes
Back
A motor that rotates clockwise hasa magnetic field going from left to rightWhat are the poles on the red and blue bobbins as they rotate?
Red and Blue top – North Red and Blue bottom - South
Back
Back
Why must the coils be wound in opposite directions around the armature?
The polarity of the two electromagnets must be opposite.
Back
Back
ElectromagneticInduction 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
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Electromagnetic
Induction
300pts What does EMF depend on?
Back
B Magnetic fieldv Velocity l Length of wire
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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
What is the difference between generators and motors?
Back
Motor converts electricity to mechanical energyGenerators 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
Back
The split rings and brushes
A device consisting of a coil that is mechanically rotated in a stationary magnetic field is called? Back
Back
Generator
Back
In a transformer the primary coil is connected to the _________ and the secondary coil is connected to the __________
Back
Primary ->Power supplySecondary -> load
Back
A step up transformer has a primary coil of 800turnsand is connected to a 120 V source. How many turnsWould be needed in the secondary coil to supply 60 V.
Back
400 Coils
When was the internet developed?
Back
1960’s
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