What are Magnetic Effects of Electric Current? Notes For Class 10 Science

1
Magnetic Effects of Electric Current Notes For
Class 10 Science
2
Magnetic Effects of Electric Current Notes For
Class 10 Science

• We have discussed the last article
  about Electromagnet In this article, we will
  study the topic Magnetic field, Magnetic Field
  Lines, Properties of magnetic field
  lines and What is the solenoid? from Chapter
  13 Magnetic effect of Electric current out
  of Class 10 Science.
•  Hans Christian Oersted (1777-1851)
• He showed that electricity and magnetism are
  related to each other. On the basis of his
  research radio and television were invented. In
  his honor, the unit of magnetic field is termed
  as Oersted.
• Experiment of Oersted

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Magnetic Effects of Electric Current Notes For
Class 10 Science

• Above figure illustrate the experiment of Oersted
  where on passing the current through the copper
  wire the compass wire near the compass gets
  deflected. If we reverse the direction of the
  current similar needle will deflect in opposite
  direction. If the direction of current is
  reversed the needle will be at rest. This happens
  because electricity and magnetism are related to
  each other.
• Magnetic field
• The region surrounding a magnet is called
  magnetic field.
• It is a vector quantity which has both direction
  and magnitude.
• Compass Needle
• It is a small bar magnet
• The ends of the needle are towards north pole and
  south pole of the ends pointing towards south
  pole of a earth.
• Magnetic Field Lines

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Magnetic Effects of Electric Current Notes For
Class 10 Science

•    t refers to the tangent to the magnetic field
  line.
• The tangent is at the point which gives the
  direction of the magnetic field at that point.
• It is also referred to the path along which a
  hypothetical free north pole tend to move towards
  the south pole.
• Properties of magnetic field lines
• The direction of magnetic field lines is
  indicated with the arrow which is outside the
  magnet and is always from north pole to south
  pole.
• Its strength is expressed with the closeness of
  magnetic field lines.
• Magnetic field lines have closed curves.
• No two lines of the magnetic field are
  intersected to each other. If they intersect then
  compass needle will show two directions of the
  field which is not possible.

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Magnetic Effects of Electric Current Notes For
Class 10 Science

• Magnetic field due to Current carrying conductor
• The above diagram illustrates the current
  carrying conductor due to the magnetic field.
• As we can see copper wire is placed parallel to
  the compass needle. When the direction of current
  reversed, the deflection in the needle gets
  reversed.
• Magnetic field due to the current through a
  straight conductor

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Magnetic Effects of Electric Current Notes For
Class 10 Science

• As we can see in the above diagram, the electric
  current is flowing from south to north direction
  and current carrying conductor is suspended
  vertically. The direction of a magnetic field
  will be anticlockwise.
• And if the current is flowing from north to south
  direction the magnetic field will be
  anti-clockwise.
• The current has a magnetic field in the form of
  concentric circles when current is carrying a
  straight conductor. The current is shown with
  magnetic field lines.
• Magnetic Field due to a current through a
  circular loop

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Magnetic Effects of Electric Current Notes For
Class 10 Science

• In the above figure wire carrying a current give
  rise to the magnetic field. Here we will apply
  the right-hand thumb rule to find the direction
  of, the magnetic field at every section of a
  wire,4
• What is the solenoid?
• It is a coil of many circular turns of insulated
  copper wire wrapped closely in the shape of a
  cylinder.
• Magnetic Field due to the current through a
  solenoid
• We will use a right-hand thumb rule and draw a
  pattern of magnetic field lines around a current
  carrying solenoid.
• One end of a solenoid will behave like a magnetic
  north pole of a solenoid and other rend behave
  like a south pole of a solenoid.
• The field inside the solenoid is the parallel
  starlight lines which imply that the magnetic
  field is the same at all the points in a
  solenoid.

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Magnetic Effects of Electric Current Notes For
Class 10 Science

• Right-Hand Thumb Rule
• This rule is also known as Maxwells corkscrew
  rule.
• The right-hand thumb rule is used to find the
  direction of the magnetic field in which current
  carrying a conductor.
• Hold a straight wire such that thumb points
  towards the direction of current and your folded
  finger around the thumb show the direction of
  magnetic field.
• Check out another online article for Class 10
  Science Electricity
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