Question on: WAEC Physics - 2008
A transformer is required to supply 12 Vrms to operate a toy train set from a 240 Vrms. 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 Option: A
(\frac{E_s}{E_p} = \frac{N_s}{N_p} = \frac{240}{12} \frac{100}{N_p})
Np = 5
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