(a) Given that the current in the primary winding is 650 A and the turns ratio is 260:2 = 130:1, the current in the secondary winding (and thus the ammeter) can be calculated as follows:
Secondary current = Primary current / Turns ratio
Secondary current = 650 A / 130
Secondary current = 5 A
Therefore, the reading on the ammeter is 5 A.
(b) The potential difference across the ammeter can be calculated using Ohm's Law:
Potential difference = Current x Resistance
Potential difference = 5 A x 0.2 Ω
Potential difference = 1 V
Therefore, the potential difference across the ammeter is 1 V.
(c) The total load in VA on the secondary winding can be calculated by considering both the resistance of the secondary winding and the resistance of the ammeter:
Total load = (Secondary current)^2 x Total resistance
Total load = (5 A)^2 x (0.3 Ω + 0.2 Ω)
Total load = 25 A^2 x 0.5 Ω
Total load = 125 VA
Therefore, the total load on the secondary winding is 125 VA.
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 Ω, the resistance of the secondary winding is 0.3 Ω. If the
current in the primary winding is 650 A, determine (a) the reading on the
ammeter, (b) the potential difference across the ammeter, and (c) the total
load in VA on the secondary
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