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Voltmeters:
Voltmeters are used to measure emf's and more commonly potential differences. The two probes of the meter are therefore connected to the two points between which the potential difference is required.
If the potential at A with respect to B is required, the red lead is connected to point A, the black lead point B.If the potential at B with respect to A is required, the red lead is connected to point B, the black lead point A.If the potential between a point and Earth or ground is required. The red lead is connected to the point and the black lead is connected to ground or Earth.
A current transformer has two turns on the primary winding and a secondary winding of 260 turns. The secondary winding is connected to an ammeter with a resistance of 0.2.The
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Characteristics of resistance:- Similar amount of current passed by each resistance i.e. I = I1 = I2 = I3 = I4 ........ The sum of potential difference across individual res
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