A transformer is required to supply 12 Vrms to operate a toy train set from...

WAEC 2008

A transformer is required to supply 12 V_rms to operate a toy train set from a 240 V_rms. If the number of turns in the in the secondary coil is 100, calculate the number of turns required in the primary coil

A. 5
B. 12
C. 2000
D. 2400

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Correct Answer: Option A

Explanation

\(\frac{E_s}{E_p} = \frac{N_s}{N_p} = \frac{240}{12} \frac{100}{N_p}\)

N_p = 5

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A transformer is required to supply 12 Vrms to operate a toy train set from...

Correct Answer: Option A

Explanation

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