KnowledgeBoat Logo
|

Physics

Assertion (A) : A pendulum clock goes slow (i.e., the time period of oscillation increases) when it is taken to mines.

Reason (R) : This is due to increase in the value of acceleration due to gravity g.

  1. both A and R are true and R is the correct explanation of A
  2. both A and R are true and R is not the correct explanation of A
  3. assertion is false but reason is true
  4. assertion is true but reason is false

Measurements

2 Likes

Answer

assertion is true but reason is false

Explanation

Assertion (A) is true because inside mines, the value of acceleration due to gravity (g) decreases because you are closer to the Earth's center.

As,

For a simple pendulum :

T=2πlg\text T=2\text π\sqrt {\dfrac {\text l}{\text g}} ​ If g decreases, T increases — the pendulum swings more slowly, so the clock loses time and goes slow.

Reason (R) is false because actually, in mines, g decreases, not increases.

Answered By

1 Like

Related Questions