Question 1

Which of the following cannot be used for measurement of time?

(a) A leaking tap

(b) Simple pendulum

(c) Shadow of an object during the day

(d) Blinking of eyes

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Solution

Blinking of eyes can be different for different people and it is not a periodic phenomenon. Hence we cannot measure time using blinking of eyes.

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Q. Which of these can only measure time interval and not the time of day?

(a) sand clock
(b) sundial
(c) pendulum clock
(d) quartz clock

Number of times our eyes blink in a day = 28,800

Number of times our eyes blink in a year = ?

Q. Which one of these is not used for measuring time?

(a) Pendulum
(b) Hour glass
(c) Meter scale
(d) Sundial

Question 1

Which of the following does not show water shortage?
(a) Taps running dry
(b) Long queues for getting water
(c) Marches and protests for demand of water
(d) A family gets three buckets of water per person per day

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Measurement of Time

Standard VII Physics

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Question 1 Which of the following cannot be used for measurement of time? (a) A leaking tap (b) Simple pendulum (c) Shadow of an object during the day (d) Blinking of eyes

Blinking of eyes can be different for different people and it is not a periodic phenomenon. Hence we cannot measure time using blinking of eyes.

Question 1

Which of the following cannot be used for measurement of time?

(a) A leaking tap

(b) Simple pendulum

(c) Shadow of an object during the day

(d) Blinking of eyes