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
TELL US , if you have any answer