A transformer with a turns ratio of 1:6 has 720 volts across 7200 ohms in the secondary. How much primary curr

Question

How much primary current is flowing? I figure about 0.01667 amps. I took 720volts/7,200 ohms to get 0.1. Then I divided it by 6, since the current ratio is the opposite of the voltage. Is this right?

Answer 1

correct.

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Answer 2

you gotta find the current in the secondary first... the question gives you the secondary resistance and enough info to find secondary voltage... use ohms law to find secondary current from there... once you have that use voltage(primary) over voltage(secondary) is equal to current(secondary) over current(primary) Vp/Vs = Is/Ip then just plug in yur numbers and solve for Ip...