1. Find the all-day efficiency of a transformer having maximum efficiency of 96% at 30-kVA load at UPF. If during the day the transformer is loaded as follows: 12 hours....... ...5 kW at 0.6 p.f. lagging ......24 kW at 0.8 p.f. 6 hours... agging 6 hours...... ..at no-load.

Q: A 50 kVA transformer has an efficiency of 98% at full load,0.8 p.f. and 97% at half full-load, 0.8…

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Q: A 50 Hz, 1-phase transformer has a turn ratio of 6. The resistances are 0.9 ohm and 0.03 ohm and…

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Q: A 2000-kVA, 6,600/400-V, 3-phase transformer is delta-connected on the high voltage side and…

A: Given Data: Transformer rating : 2000-kVA, 6,600/400-V, 3-phase Full load pf = 0.8 Short circuit…

Q: 1- A single-phase power system is shown in Figure below. The power source feeds a 100- kVA 14/2.4-kV…

A: Given single phase power system shown  Transformer is100 KVA 14/2.4-kvThe load on the transformer…

Q: In a 100 kVA, 1100/220 V, 50 Hz single-phase transformer with 2000 turns on the high-voltage side,…

A: The solution is given below.

Q: A 400-kVA transformer has a primary winding resistance of 12 and a secondary winding resistance of…

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Q: Q:A 50 Hz, single phase transformer has a tums ratio of 6.The resistances are 0.9 2 and 0.03 Q and…

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Q: Single phase 10 kVA, 480 V / 120 V to feed a 120 V load from a 600 V source conventional transformer…

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Q: A 20 kVA, 2000/200-V, 50 Hz transformer has a high voltage winding resistance of 0.2 2 and a leakage…

A: Resistance: It is a property of a material that resists the flow of the current.   This is denoted…

Q: In a 440 V, 50 c/s transformer, the total iron loss is 2500 W. When the supplied p.d. is 220 V at 25…

A: Please refer the attached images for the complete answer.. Please upvote if you like this answer.

Q: ing is proportional to the current in that winding because (a) Ohm's law applies to magnetic…

A: In a transformer the leakage flux of each winding is proportional to the current in that winding…

Maximum power transfer theorem

A resistive load will consume maximum power from a network when the load resistance is equal to the resistance of the network as viewed from the open-circuit terminals, with all energy sources removed leaving only the internal resistances. Physicist Moritz von Jacobi introduced the maximum power transfer theorem in 1940. Therefore, this theorem is also known as Jacobi's law.