engineering recuitment JSSC JE Mock Test 2023 Electrical Machines Transformer Ideal Transformer

An ideal transformer has N1 = 100 turns and N2 = 200 turns with a mutual flux of ϕm(t) = -0.05 (t2 – 2t). The induced emf of secondary is

1
5(t - 1)V
2
10(t – 1)V
3
5(t2 - 1)V
4
20(t - 1)V
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