NCERT Class 10 Science Chapter 13 Activity 13.8 Solution
In this article,
we will discuss activity
13.8 class 10 science
with a complete explanation with a conclusion.
After studying
this activity 13.8 Class 10 Science Chapter 13 Magnetic Effects of Electric Current,
you will be able to solve Questions based on this activity 13.8.
Activity 13.8 Class 10 Science Chapter 13
·
Take
a coil of wire AB having a large number of turns.
·
Connect
the ends of the coil to a galvanometer as shown in the figure.
·
Take
a strong bar magnet and move its north pole towards the end B of the coil. Do you
find any change in the galvanometer needle?
·
There
is momentary deflection in the needle of the galvanometer, say to the right. This
indicates the presence of a current in the coil AB. The deflection becomes zero
the moment the motion of the magnet stops.
·
Now
withdraw the north pole of the magnet away from the coil. Now the galvanometer
is deflected towards the left, showing that the current is now set up in the
direction opposite to the first.
·
Place
the magnet stationary at a point near the coil, keeping its north pole towards
the end B of the coil. We see that the galvanometer needle deflects towards the
right when the coil is moved towards the north pole of the magnet. Similarly, the
needle moves towards the left when the coil is moved away.
·
When
the coil is kept stationary with respect to the magnet, the deflection of the galvanometer
drops to zero. What do you conclude from this activity?
.webp "Activity 13.8 Class 10 Science Chapter 13")
Activity 13.8 Class 10 Science Observation
There is
deflection seen in the galvanometer when there is relative motion between coil and
magnet, when relative motion stops, there is no deflection in the galvanometer.
Activity 13.8 Class 10 Science Explanation
When the north
pole of the bar magnet is moved towards the end B of the stationary coil, an
electric current is induced in the coil, and deflection towards the right is seen in
the galvanometer needle.
When the bar
magnet is kept stationary near the stationary coil, there is no deflection in the galvanometer because there is no current is induced in the coil.
When the N pole
of the
bar magnet is moved away from
the stationary coil, the galvanometer needle deflects towards the left because
there is a current is induced in the coil.
Now the bar
magnet is kept stationary and the coil is moved towards the magnet, the galvanometer needle deflects towards the right.
When the coil is
moved away from the stationary coil, the galvanometer needle deflects towards the left.
When there is no motion between a bar magnet and coil, there is no deflection because no current is induced in the coil.
A galvanometer is an instrument that detects the presence of electric current in a circuit.
Activity 13.8 Class 10 Science Conclusion
Through activity 13.8, it is concluded that whenever there is relative
motion between coil and magnet, there is induced current in the coil.
Related Topics for you
1. Activity 13.9 Class 10 Science
2. Activity 13.7 Class 10 Science
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