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Electromagnetism
Page 5
Questions (3,771)
How do electromagnets cause a maglev train to levitate above the track? (1 point)
Responses Magnets in the track and magnets in
1 answer
asked by
Water
91 views
Students build four electromagnets and test them by picking up metal tacks. Here are their partial results.
12 coils 4 tacks 24
1 answer
asked by
Water
103 views
Which of the following factors would decrease the magnetic field strength of an electromagnet?(1 point)
Responses using an iron
4 answers
asked by
Water
87 views
When two charged particles are moving toward each other, their velocities decrease until they eventually come to a stop. What
1 answer
asked by
Water
92 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
1 answer
asked by
T
109 views
An electromagnet is a coil of wire with a current running through it. This creates an electromagnetic field. An additional
1 answer
asked by
oh em gee wow
77 views
Which of the following directly affects the strength of an electromagnet?
a Length of core, type of force b Type of force, number
1 answer
asked by
kali
87 views
Which can produce a magnetic field?
a. moving water b. insulators with conductors c. an electric current d. a solid state
17 answers
asked by
christinaqz
97 views
An electron is limited to travel at speeds less than c. Does this put an upper limit on the momentum of an electron? If so, what
1 answer
asked by
Marie
88 views
Which factors directly affect the magnetic force produced by an electromagnet
1 answer
asked by
DeeDee
114 views
How come the more turns a coil gets the more magnetic it gets?
11 answers
asked by
Caleb Pans
84 views
Avery is experimenting with a simple circuit. She measures the current in the circuit three different times with a different
1 answer
asked by
T
108 views
Use the table to answer the question.
| Electromagnet |Current Intensity | Number of Turns |
1 answer
asked by
ray
89 views
Which of the following is NOT a way you can strengthen an electromagnet?
a Increasing the voltage of a battery b Using thicker
1 answer
asked by
no name
61 views
11 a) A straight piece of conducting wire, 20 cm long, lies at 70°
a magnetic field of 1.8 × 10−5 T. A current, I, is allowed
1 answer
asked by
Fuad faji jemal
76 views
Which statement below best describes the electrical force between the two charged objects.
a Object A is negatively charged and
1 answer
asked by
no name
266 views
Which of the following will decrease the electrical force between two charges? (Select all that apply)
a increasing the distance
1 answer
asked by
no name
193 views
A student wishes to make the magnetic force exerted by the electromagnet shown below greater.
image
23 answers
asked by
s
157 views
What must an object gain or lose to become electrically charged?
a electrons b protons c nucleus d neutrons
1 answer
asked by
kali
70 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
1 answer
asked by
kali
191 views
16. An electron moves with a speed of 8.0 x 106 m/s along the +x-axis. It enters a region where
there is a magnetic field of 2.5
1 answer
asked by
dfxdt
70 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
1 answer
asked by
LUNE
82 views
Which of the following choices of path allow you to use Ampère’s law to find B(r).
1. The path must pass through the point
4 answers
asked by
Spencer
1,708 views
A proton moving eastward with a velocity of 5.0 km/s enters a magnetic field of 0.20 T pointing northward. What is the magnitude
1 answer
asked by
ant
127 views
A particle with a mass of 6.64x10^-27 kg and a charge of +3.2x10^-19 C is accelerated from rest through a potential difference
4 answers
asked by
Anonymous
2,610 views
An infinite line charge of uniform linear charge density lambda = -2.5 micro Coulombs lies parallel to the y axis at x = 0 m. A
6 answers
asked by
aaron b.
3,110 views
An electromagnetic wave is produced by:
A. an accelerating charged particle or changing magnetic fields B. an accelerating
3 answers
asked by
sophie
852 views
When an electron is displaced in a semiconductor, the hole that's left behind is
A. incapable of carrying a charge. B. considered
3 answers
asked by
Anonymous
981 views
Which of the following best
describes eddy current? A. The induced emf in a circuit is directly proportional to the rate of
2 answers
asked anonymously
123 views
the motor effect that results from the interaction of the magnetic field around a current carrying conductor and a bar magnet
1 answer
asked by
Mbewenhle
85 views
How do electromagnets cause a maglev train to levitate above the track? (1 point) Magnets in the track and magnets in the bottom
1 answer
asked by
roar
206 views
Students build four electromagnets and test them by picking up metal tacks. Here are their partial results. 12 coils 4 tacks 24
1 answer
asked by
roar
106 views
what is the principle of magnetism
1 answer
asked by
Mbewenhle
70 views
A magnetic field is created by a charged particle that is
* 1 point balanced. motionless. moving. unbalanced.
11 answers
asked by
k
64 views
Which of the following directly affects the strength of an electromagnet?
a Number of coils, amount of current b Length of core,
1 answer
asked by
no name
62 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
1 answer
asked by
social studies
104 views
What do you need to create an electromagnet?
1. Current, Coil, Conductor 2. Coulomb, Coil, Charge 3. Conductor, Coil, Core 4.
1 answer
asked by
asjdhwuei
66 views
does a compass use an electromagnet
4 answers
asked by
asjdhwuei
61 views
Which of these doesn't usually use an electromagnet?
1. A compass 2. A speaker 3. A school bell
1 answer
asked by
asjdhwuei
70 views
An electromagnet can be made stronger by...
1 answer
asked by
asjdhwuei
58 views
How can we increase the strength of an electromagnet?
1 answer
asked by
asjdhwuei
77 views
A current of 21A is passed
through a 20m length of two conducting wire placed 125cm apart. Determine the force of attraction
2 answers
asked anonymously
105 views
41. Calculate the force acting on
an electron of charge 1.6 x 10-19C placed in an electric field intensity 108Vm−1 . A. 1.6 x
2 answers
asked anonymously
63 views
Calculate the cut off wavelength for a TE2,1 wave propagating through a coaxial cable that have the following parametric values:
1 answer
asked by
Thapelo
108 views
Fill in the blank.
For the magnetic field created around a current carrying wire in an electromagnet, the _________ the current,
4 answers
asked by
Bella
71 views
There are 2 objects, one with a +2 charge and one with a -2 charge. If we increase the distance between the two objects, what
1 answer
asked by
Bella
63 views
which of the following statements about field lines is true?
a. field lines are always perpendicular to the surface of the object
4 answers
asked by
oyebodegoldencity
95 views
the attractive or repulsive interaction between two charged particles
1 answer
asked by
social studies
78 views
the region around an object that exerts a force on other charged objects
1 answer
asked by
social studies
107 views
the attractive or repulsive interaction between two charged particles
1 answer
asked by
social studies
56 views
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