Physics WAEC

A transformer with 55500 turns in its primary is used between a 240V a. c supply and a 120V kettle. Calculate the number of turns in the secondary
A transformer with 55500 turns in its primary is used between a 240V a. c supply and a 120V kettle. Calculate the number of turns in the secondaryA transformer with 55500 turns in its primary is used between a 240V a. c supply and a 120V kettle. Calculate the number of turns in the secondary

A. 11000
B. 2750
C. 460
D. 232
E. 10

Correct Answer:

Option B = 2750

Explanation

Ep/Es = np/ns
240/120 = 5500/ns

=> ns = 2750

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