A single-phase step-down transformer has a primary winding of 2200 turns and a…
PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A single-phase step-down transformer has a primary winding of 2200 turns and a secondary winding of 110 turns. The primary is connected to a 230 V, 50 Hz alternating-current mains supply. The transformer may be assumed ideal.
(i) Find the secondary rms voltage on no-load.
(ii) When the secondary delivers 5.0 A to an external load, calculate the rms current in the primary winding.
(iii) Determine the electrical power delivered to the load in watts.