.. The primary resistance of a 440/1 10-V transformer is 0.5 Q and the secondary resistance is 0.04 n. When 440 V is applied to the primary and secondary is left open-circuited, 200 W is drawn from the supply. Find the secondary current which will give maximum efficiency and cakulate this efficiency for a load having unity power factor. [53 A ; 93.58%]

what is the answer for peak to peak ripple and dc output voltage? please answer in 4 decimal places thank you

The primary resistance of a 440/110-V transformer is 0.5 ohms and the secondary resistance is 0.04 ohms. When 440 V is applied to the primary and secondary is left open-circuited, 200 W is drawn from the supply. Find the secondary current which will give maximum efficiency and calculate this efficiency for a load having unity power factor.

The equivalent resistance of the primary of a transformer having K = 6 and R1 = 0.2 ohm when referred to secondary becomes.......ohm. Group of answer choices  0.004 7.2  0.72 0.0055

primary of a certain transformer takes 1 a at a power factor of 0.4 when it is connected acrossa 200-v, 50-hz supply and the secondary is on open circuit. the number of turns on the primary istwice that on the secondary. a load taking 50 a at a lagging power factor of 0.8 is now connectedacross the secondary. what is now the value of primary current ?

The efficiency of a transformer at load 0.8 p.f. Lag is -- at load 0.8 p.f. Lead * equal less than more than none of these

You have been assigned to select a transformer to supply a peak power of 100 kW to a load that draws peak power only a very small percentage of the time and draws very little power the rest of the time. Two transformers, A and B, are both suitable. While both transformers have the same efficiency at peak load, most of the loss in A is due to core loss, and most of the loss in B is due to the resistances of the coils. From the standpoint of operating costs, which transformer is better? Why?

A 100 Kva transformer has 400 turns on the primary and 80 turns on the secondary. The primary and secondary resistances are 0.3 ohm and 0.01 ohm respectively , and the corresponding leakage reactances are 1.1 ohms and 0.035 ohm respectively. The supply voltage is 2200 V. The % VR and the secondary terminal voltage for full load 0.8 pf leading are: -1.44 and 330.29 V O 1.54 and 4467.7 V -1.54 and 446.77 V

Find the primary current (i1) in the following ideal transformer

A 5KVA ideal transformer supplied with 120V RMS and connected to a 1kQ load draws 2A RMS of current on the secondary. What load must be connected in order to draw full power? 1kQ 2.5kQ 8000 3.50