Cdeo 608E

If the voltage of the primary coil in a transformer is twice that of the voltage in the secondary coil, then the current in the secondary coil is ____ that of the primary coil.   Question 4 options:   four times   twice as much   the same as   1/2 as much   1/4 as much   None of the other responses are correct.

The spool is a transformer. It consists of two windings of copper wire, "the primary coil 1, the secondary coil 2." The primary coil is composed of 220 turns of wire. The secondary coil is composed of 120 turns of wire. (1) The secondary coil terminals are connected to a light bulb. Nothing happens. The primary coil is connected to a AC power supply. What do you observe about the light bulb (2) a) Explain why a changing voltage (across the primary coil) creates a changing magnetic field around the transformer. b) Explain why the changing magnetic field around the transformer, induces a changing voltage in the secondary coil. (3) The experimenter brings a heavy cast iron bolt towards the transformer. Why does the heavy iron bolt appear to get “sucked in” to the central hole in the transformer? b) What do you observe about the light bulb? c) How can you explain this?

Two resistors of resistance R1and R2 are placed in series across a battery with voltage V, such that a current I=V/(R1+R2) flows around the circuit. If a coil with inductance L is then placed inparallel withR1, what is the new currentIa long time after the coil has been added? Give your final answer.