These galvanometers are of d’Arsonval type having a moving coil suspended between the pieces of a permanent magnet. When an alternating current is passed through the moving coil, an alternating deflecting torque is produced which makes the coil vibrate with a frequency equal to the frequency of the current passing. On account of inertia of
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It consists of a single loop of thin phosphorbronze strip which forms the moving system. It is called a vibrator loop. The vibrator loop is situated in the field of a permanent magnet but when high sensitivities are required, highly saturated electromagnets are used. The vibrator loop is formed by passing the strip over an
Duddell’s Oscillograph Element – Pedagogy Zone Read More »
1. Define a transformer. A transformer is a static device which change the alternating voltage form one level to another. 2. What is staggering in the construction of transformers? In transformer, the joints in the alternate layers are staggered in order to avoid the presence of narrow gaps right through the cross section of the
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