A house is supplied with a 240V a.c mains. To operate a door bell rated at 8v, a transformer is used if the number of turns in the primary coil of the transformer is 900. calculate the number of turns in the secondary coil of the transformer
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
Correct Answer: Option A
Explanation:
\(\frac{E_p}{E_s} = \frac{n_p}{n_s}\)
ns = 30
\(\frac{E_p}{E_s} = \frac{n_p}{n_s}\)
ns = 30