# 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
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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