An clectromagnetic scale consists of a small coil with N=220 turns mounted on one end of a balance beam and placed between the poles of an clectromagnet as shown in the figure. The radius of the coil is 0.6 cm and the length of the arm OA of the balance beam is 35 cm. When there is no current in the coil, the beam is horizontal. On passing a current of 26 mA through the coil, the equilibrium is restored by putting a mass of 82 mg on the balance pan A. Find the magnetic field in the region of the coil. S.
An clectromagnetic scale consists of a small coil with N=220 turns mounted on one end of a balance beam and placed between the poles of an clectromagnet as shown in the figure. The radius of the coil is 0.6 cm and the length of the arm OA of the balance beam is 35 cm. When there is no current in the coil, the beam is horizontal. On passing a current of 26 mA through the coil, the equilibrium is restored by putting a mass of 82 mg on the balance pan A. Find the magnetic field in the region of the coil. S.
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Transcribed Image Text:An electromagnetic scale consists of a small coil with N 220 turns mounted on one end of a
balance beam and placed between the poles of an electromagnet as shown in the figure. The
adius of the coil is 0.6 cm and the length of the arm OA of the balance beam is 35 cm.
When there is no current in the coil, the beam is horizontal, On passing a current of 26 mA
through the coil, the equilibrium is restored by putting a mass of 82 mg on the balance pan A.
Find the magnetie field in the region of the coil.
S.
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