Physics
How do you measure the time period of a given pendulum? Why do you note the time for more than one oscillation ?
Answer
To measure the time period of a given pendulum, we record the time for 20 or more oscillations and then divide the recorded time with the number of oscillations. Hence, we get the time period for one oscillation.
The time for more than one oscillation is noted, as the least count of stop watch is either 1s or 0.5s. It cannot record the time period in fraction such as 1.2s or 1.4s and so on.
Hence, it is made possible by noting the time t for 20 oscillations or more and then dividing it by the number of oscillations.
Related Questions
Name two factors on which the time period of a simple pendulum depends. Write the relation for the time period in terms of the above named factors.
Two simple pendulums A and B have lengths 1.0 m and 4.0 m respectively at a certain place. Which pendulum will make more oscillations in 1 minute? Explain your answer.
Draw a neat diagram of a simple pendulum. Show on it the effective length of the pendulum and its one oscillation.
State how does the time period of a simple pendulum depend on —
(a) length of pendulum,
(b) mass of bob,
(c) amplitude of oscillation and
(d) acceleration due to gravity.