An ideal transformer has a turn ratio

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

An ideal transformer has a turn ratio Np:Ns=10:1N_p:N_s = 10:1. If a 5 Ω5\,\Omega resistor is connected across the secondary, the resistance as seen from the primary side is (a) 50 Ω50\,\Omega (b) 5 Ω5\,\Omega (c) 500 Ω500\,\Omega (d) 100 Ω100\,\Omega

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