ELECTROMAGNETIC BALANCE Description and Specifications for Lab Tenders
ELECTROMAGNETIC BALANCE.
ELECTROMAGNETIC BALANCE
The end of one of the two arms of this balance is equipped with
a rectangular turn of aluminium with base of 4 cm, immersed
in the field of a powerful permanent magnet. The other arm
is provided with two sliding masses that enable to reach the
equilibrium in rest conditions.
When some current crosses the circuit, a force F is generated
between magnetic field B and electric current I : its value is
determined by Ampère’s law:
F = B • l • I • sine α
where l is the length of the conductor and α is the angle
existing between the conductor and the magnetic fi eld. Thus it
is possible to verify that the intensity of this force is maximum
when α = 90°, and null when α = 0°.
Value I of electric current can be read on the ammeter included
in the equipment ; then induction B of the permanent magnet
can be determined.
Repeat this test by replacing the permanent magnet with a
solenoid. Thus the relation that gives the value of the magnetic
field inside a solenoid can be verified.
Balance sensitivity: 10 mg
Dimensions : 45 x17 x 22 cm.
COMPONENTS:
• 1 Balance elettromagnetica
• 1 permanent magnet
• 1 Solenoid
• 1 Set of weights of 200 g with fractions of gram
• 1 Heat sink resistor