NCERT Class 10 Science Chapter 13 Activity 13.9 Solution
In this article,
we will discuss activity
13.9 class 10 science
with a complete explanation with a conclusion.
After studying
this activity 13.9 Class 10 Science Chapter 13 Magnetic Effects of Electric Current,
you will be able to solve Questions based on this activity 13.9.
Activity 13.9 Class 10 Science Chapter 13
·
Take
two different coils of copper wire having a large number of turns(say 10 and 100
turns respectively). Insert them over a non-conducting cylindrical roll, as shown
in the figure. (You may use a thick paper roll for this purpose)
·
Connect
the coil-1, having a larger number of turns, in series with a battery and a plug key.
Also, connect the other coil -2 with a galvanometer as shown.
·
Plug
in the key. Observe the galvanometer. Is there a deflection in its needle? You
will observe that the needle of the galvanometer instantly jumps to one side
and just as quickly returns to zero, indicating a momentary current in coil-2.
·
Disconnect
coil-1 from the battery. You will observe that the needle momentarily moves but
to the opposite side. It means that now the current flows in the opposite
direction in coil-2.
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Activity 13.9 Class 10 Science Observation
Deflection in
the galvanometer connected to coil-2 occurs when current is
passed in coil-1.
When the battery is disconnected
from coil-1, then deflection
in the galvanometer
occurs in opposite direction to the previous one.
Activity 13.9 Class 10 Science Explanation
When we plug the key into the circuit, the current in coil-1
starts flowing and reaches from zero to maximum so the magnitude of the magnetic field in coil-2 changes, and the current is induced in the
coil-2 which is shown by the galvanometer.
When the battery is
disconnected from coil-1, the current becomes zero from the maximum, due to which the magnetic field associated with coil-2 changes, and current is induced in coil-2.
The direction of
induced current can be determined by Fleming’s Right-Hand
Rule.
The process by
which changing the magnetic field in a conductor induces a current in another conductor
is called Electromagnetic induction.
Activity 13.9 Class 10 Science Conclusion
Through activity 13.9, it is concluded that a potential difference is
induced in coil -2 whenever the current through coil-1 changes.
What is the cause of induced current in the coil?
Ans. – When the magnetic field associated with
the coil changes, an electro-motive force is produced which produced an induced
current.
Related Topics for you
1. Activity 13.1 Class 10 Science
2. Activity 13.8 Class 10 Science
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