What happens to the magnetic field if the leads (polarity is swapped)?
Why was the bulb eliminated once the circuit was working properly?
How did you determine the polarity of the electromagnet?
Is there a difference between the magnetic field created by the bar magnet, and this electromagnet?
Can the compass differentiate between a ferrite magnets and electromagnets.
Explain a couple advantages of an electromagnet over a ferrite magnet.
For this electromagnet, should the magnetic fields be different or the same for the two different (horizontal, vertical) electromagnet orientation?
Please explain in detail, please
What happens to the magnetic field if the leads (polarity is
swapped)?
Ans. When polarity of the coil is changed by swapping the leads the
direction of magnetic field becomes reverse to its original
direction with the magnitude remaining constant. This happens
becuase chaging polarity
changes the direction of current in the coil causing the direction
of magnetic field to reverse as magnetic field direction depends on
the directino fo the current.
Why was the bulb eliminated once the circuit was working
properly?
Ans. The blub is used to check the flow of electrons (irrespective
of direction), so once the circuit is working properly (i.e.
current flow in the circuit) has been established, we dont need
bulb for visual confimation
of the activity of circuit. Also, adding a bulb adds extra
resistance to the circuit, which changes with time as bulb begins
to get hooter when current pases through it.
How did you determine the polarity of the electromagnet?
Ans. Polarity of an electro magenet can be determied by a
preexisting callibrated permanent magnet. Bringing borth pole of
the magnet to one side of the electromagent, the repulsion or the
attraction will tell us about the
polarity of the electromagnet.
Is there a difference between the magnetic field created by the
bar magnet, and this electromagnet?
Ans. Technically there is no difference in the magnetic field
generated due to an electromagnet and a bar magnet, except that a
bar magnet has fixed magnetic field where as in case of an
electromagnet
one can adjust direction as well as magnitude of magnetic
field.
Can the compass differentiate between a ferrite magnets and
electromagnets.
Ans. A compass can differentiate between ferrite magnetis and
electromagnets. To do this, we switch off current supply to
electromagnet, which removes its magnetic properties and now
compass will move only under the influence
of ferrite magnet but will not move under the influence of
electromagent as there is no current in electromagnet.
Explain a couple advantages of an electromagnet over a ferrite
magnet.
Ans Advantage os electromagnet over ferrite magnet :
A. Controllable direction and magnitude of magnetic field
B. No upper limit to the maximum value of magnetic field that can
be generated by electromagnet, where as ferrite magnet has to be
manufactured to be of such a big size to be able to prpoduce large
magnetic fields
For this electromagnet, should the magnetic fields be different
or the same for the two different (horizontal, vertical)
electromagnet orientation?
Ans. The magnetif fields whould be different for the different
configurations as horizontal and vertical magnets have different
poles facing different directino and hence the magnetic field is
also different
What happens to the magnetic field if the leads (polarity is swapped)? Why was the bulb...
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(a) Which part of an atom is positively charged, and which part is negatively charged? (b) How does the charge of an electron compare with the charge of another electron? (c) How does the charge of an electron compare with the charge of a proton? Can charge be created or destroyed? How does that answer relate to the conservation of charge? How is electric charge similar to mass? How are they different? What are two ways electric charge can be...