Question #5700042

Physics exam revision help?

I am trying to work out this past exam question could anyone help,thanks. A 75 W high intensity lamp has a resistance of 12 ohms when burning. The lamp’s power comes from the secondary of a small transformer, the primary of which is connected to a 120 V circuit. What is the ratio of the number of turns on the secondary winding? What is the minimum current through the primary when the lamp is on

2013-04-26 13:48:35

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