Why do the pendulum clocks go slow in summer and fast in winter?

• A

  The length of the pendulum used in clocks decreases in summer and hence T increases whereas in winter, the length of the pendulum decreases, so T decreases. T increases means clock goes slow.

• B

  The length of the pendulum used in clocks increases in summer and hence T decreases whereas in winter, the length of the pendulum decreases, so T decreases. T increases means clock goes slow.

• C

  The length of the pendulum used in clocks increases in summer and hence T increases whereas in winter, the length of the pendulum increases, so T decreases. T increases means clock goes slow.

• D

  The length of the pendulum used in clocks increases in summer and hence T increases whereas in winter, the length of the pendulum decreases, so T decreases. T increases means clock goes slow.