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Simple Buzzer
Basic working principle of simple buzzer is electromagnetism.
Material required:
Copper wire (insulated and bare Ended), insulated wire for connection, low-voltage
Power supply or Battery, Hacksaw blade or metal strip, nail or screw
Description: Wind the copper wire around
the nail or screw (about 150 – 200 turns) fixed on base. This will form an
electromagnet. Fix the Hacksaw blade or metal strip on base in such a that the other
end of the blade will remain 2-3 mm above the nail or screw. Connect one end
of electromagnet wire with battery. Connect the other terminal of battery with
fixed end of blade. Another end of electromagnet wire is connected in such a way that it touches the top of the
blade. In this way buzzer sound is produced.
Different Models:
Shive Wave Machine
The wave machine is a very simple device used to demonstrate the transverse waves. John N. Shive invented the Shive wave machine (also known as the Shive wave generator).
Material required: Rods, Metal wire, stand etc.Description: The wave machine consists of a set of horizontal rods connected at the center by thin metal wires. When you move the rod on the end, it transmits energy to the other rods through the wire. This machine produces moving transverse waves.
Different Models:
Tag :
Classical mechanics,
wave,
Standing Waves on a String / Ring
A standing wave also called stationary wave is a wave that
remains in a constant position.
Material required: Mechanical
Vibrator, string, Small weight, pulley, etc
Description: A heavy string is attached at one end to the vibrating mechanism, whereas the other end passes over a pulley and has a weight attached to provide tension in the string. By adjusting the frequency or adjusting the tension in the string, a variety of standing wave patterns are generated. These standing wave modes arise from the combination of reflection and interference. All standing wave patterns have nodes and antinodes. The antinodes result from the constructive interference (maximum displacement) of the two waves while Nodes result from the destructive interference (no displacement) of the two waves.
One can also create standing wave on circular ring.
Note: Length of the string is multiple of half the
wavelength. In case of ring circumference of ring equal to odd number of half
wavelengths.
Different Models:
Tag :
Classical mechanics,
wave,
