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Q. A twelve-slit strobe disc is rotated at the max stopping frequency for a vibrating object. The strobe is rotated at 4.0 Hz.
(a) Evaluate the period of the vibrating object?
(b) If every second slit is covered with tape, how fast could the strobe now have to be rotated to "stop" the same object?
give applications of resonance
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what is zener diode?
What are lens aberrations? Give reasons for them. Illustrate the working of a simple microscope and give a mathematical expression for its magnifying power.
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