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?
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?
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