Question

If the length and Time period of an oscillating pendulum have errors of 2% and 4 % respectively, then the error in the measurement of acceleration due to gravity is _____.​

Answer 1

Answer:

7% is your answer.

If the length and Time period of an oscillating pendulum have errors of 2% and 4 % respectively, then the error in the measurement of acceleration due to gravity is 7%.

Hope this helps.

Answer 2

Explanation:

Correct option is

C

0.8 %

Number of oscillations n=20

Time taken =25 s

∴ Time period of oscillation T=

20

25

=1.25 s

Given :

Error in time for 20 oscillations, ΔT=0.2 s

Hence error in time for 1 oscilations, ΔT

′

=

n

0.2

= s

∴ Percentage error =

T

ΔT

×100=

20×1.25

0.2

×100=0.8 %