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What is the turn ratio of an ideal transformer?
The turn ratio of an ideal transformer is equal to the ratio of voltages, ie. Np/Ns = Vp/Vs
Derive the EMF equation of single phase transformer.
The E.M.F. equation of a single phase transformer is given by E = 4.44fNφ, where E is the induced electromotive force (EMF), f is the frequency of the alternating current, N is the number of turns in the primary winding, and φ is the magnetic flux.
Why are laminated steel cores used in transformers?
Laminated steel cores made of silicon steel sheets are used to reduce eddy current losses in the core during magnetic field reversals.
What is the advantage of a shell type transformer over a core type?
Shell type transformer has less leakage flux, lower eddy current losses, and higher efficiency compared to core type transformer.
Explain the construction and working of a single-phase transformer?
A single-phase transformer consists of two windings, primary and secondary, wound around a magnetic core, typically made of laminated silicon steel to reduce energy losses. When an alternating current flows through the primary winding, it creates a varying magnetic flux in the core. This flux passes through the secondary winding, inducing a voltage based on the ratio of turns in the primary to the secondary. The transformer thus converts the input voltage to a higher or lower output voltage without changing the frequency.