Oscillation time of the seconds pendulum

The correct option is 2 seconds.

Key Points

• Seconds' Pendulum: A pendulum whose period is precise two seconds.
  • One second for swing in one direction and one second for return swing.
  • The frequency of the seconds' pendulum is 1/2 Hz.
  • Mostly used in clocks for the second measurement.
  • The period of oscillation of the second pendulum is 2 seconds

Additional Information

Simple Pendulum:

• An ideal simple pendulum consists of a heavy point mass body (bob) suspended by a weightless, inextensible, and perfectly flexible string from rigid support about which it is free to oscillate.
• For a simple pendulum, the time period of swing of a pendulum depends on the length of the string and acceleration due to gravity.

\(T = 2\;{\rm{\Pi }}\sqrt {\frac{{\rm{l}}}{{\rm{g}}}} \)

The above formula is only valid for small angular displacements.

Where, T = Time period of oscillation, l = length of the pendulum, and g = gravitational acceleration

• The force which acts to bring a body to its mean position/equilibrium position is called a restoring force.