1.

During summer, the time period of the pendulum of a clock changes to 2.02 s from 2 s. The clock runsA. slow by 14.4 minutes per dayB. fast by 14.4 minutes per dayC. slow by 28.8 minutes per dayD. fast by 28.8 minutes per day

Answer» Correct Answer - A
In one oscillation pendulum loses time 0.02 s.
`therefore` In day `((86400)/(2))`oscillation loses time is,
`((86400)/(2))xx0.02=864s`
`=(864)/(60)=14.4min`.


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