An alternating voltage with a frequency of 50Hz has a period of?
A. 0.02s B. 0.05s C. 0.20s D. 0.50 s E. 50.00s Correct Answer: Option A – 0.02s
The period of a wave is 0.02 second. Calculate its wavelength if its speed is 330 ms-1.
A. 6.6m B. 5.0m C. 4.0m D. 3.3m E. 2.0m Correct Answer: Option A – 6.6mA sound note of frequency 250 Hz and wavelength 1.3m is produced at a point near a hill. If the echo of the sound is received 1 second later at the point, how far away is the hill from the point?
A. 131.3m B. 162.5m C. 248.7m D. 251.3m E. 325.0m. Correct Answer: Option B – 162.5m
Which of the following wave characteristics can be used to distinguish a transverse wave from a longitudinal wave?
A. Reflection B. Refraction C. Diffraction D. Polarization E. Interference Correct Answer: Option D – PolarizationProducts
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