Pick out the correct combination for a step-up transformer.(a) k Vp, Is > Ip, Ns > Np(b) k > 1; Vs > Vp, Is Np(c) k > 1; Vs > Vp, Is > Ip, Ns > Np(d) k Ip, Ns > NpThis question was addressed to me during an interview.I would like to ask this question from Alternating Current topic in portion Alternating Current of Physics – Class 12

Pick out the correct combination for a step-up transformer.(a) k < 1;

1.	Pick out the correct combination for a step-up transformer.(a) k < 1; Vs > Vp, Is > Ip, Ns > Np(b) k > 1; Vs > Vp, Is < Ip, Ns > Np(c) k > 1; Vs > Vp, Is > Ip, Ns > Np(d) k < 1; Vs < Vp, Is > Ip, Ns > NpThis question was addressed to me during an interview.I would like to ask this question from Alternating Current topic in portion Alternating Current of Physics – Class 12
Answer» Correct option is (b) k > 1; VS > Vp, Is < Ip, NS > NP The explanation: For a step-up transformer, the voltage at the second terminal is greater than the primary terminal, i.e. ➔ Vs > Vp. Similarly, the current in the secondary coil is lesser than that current flowing the primary coil, i.e. ➔ Is < Ip. ALSO, the number of turns in the secondary winding is greater than that in the primary winding, i.e. ➔ Ns > Np. So the transformation RATIO will be greater than 1. So, the correct combination is given as: k > 1; Vs > Vp, Is < Ip, Ns > Np

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