Buzzer in Vacuum
For use on pump plate not less than 15 cm. diameters Electric Bell operating on 4-6 volts AC/DC, suspended on rubber cord in bell jar. Fine coiled wire connections to terminals mounted in rubber bung sealing the jar
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Tuning Fork Electrical
0 out of 5(0)Mounted on sturdy streamlined base with provision for horizontal or vertical use, fork is manufactured from selected steel. Prong is 10 x 25 x 300 mm. accurate frequency adjustment, vibrations rate 60 per second. Electromagnet can work on 6 Volts. The amplitude of vibration can vary by sliding the electromagnet inside the prongs.
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Resonance Apparatus
0 out of 5(0)It consists of a tube 100cm long, 25mm dia mounted on a stand which is fitted with leveling screws. The lower end of the rubber tubing provided is connected to the 500ml glass reservoir which slides on a metal rod and can be raised or lowered for adjusting the length of column of air. It is used to measure the velocity of sound waves in air at room temperature by using a tuning fork.
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Tuning Fork Pair on box (Beats Apparatus)
0 out of 5(0)It comprises two tuning forks each of frequency 426 Hz on two separate resonance boxes. One fork is fitted with adjustable loading mass. When both forks are sounded together, a clearly audible beat is produced. Rate of beats depends on difference in frequencies. This difference can be increased by changing the loading mass.
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