Physics Past Questions and Answers

Which of the following instruments has a pure tone?

The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz?

Which of the following statements supports the assumption that light travels in straight lines?

When the length I of a piece of wire under constant tension is varied, the relationship of the frequency of the vibration f\(\alpha\)/ is

If an object is placed in front of two mirrors inclined at 90^o, how many images will be formed?