What are Magnetic Effects of Electric Current? Notes For Class 10 Science - PowerPoint PPT Presentation

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

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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. The magnetic effect of electric current is known as electromagnetic effect. – PowerPoint PPT presentation

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Title: 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

3
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

4
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.

5
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

6
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

7
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.

8
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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