A step down transformer has N_s to N_p ratio of 20 : 1. If 8V are developed across 0.4 secondary, the primary current will be

MHT CET 2022 Physics question

A step down transformer has to ratio of 20 : 1. If 8V are developed across 0.4 secondary, the primary current will be

(A)1ACorrect
(B)0.5 A
(C)4 A
(D)2 A

Answer: (A)

Solution

Secondary current . For an ideal transformer . A step-down transformer has fewer secondary turns, so (the ratio of 20 : 1 refers to the turns ratio, primary to secondary),

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Question ID VK-093908