Q: When a simple pendulum is taken from the Equator to the Pole, its period of oscillation will :

Time period of simple pendulum is given by \$T =2\pi\sqrt{\dfrac{l}{g}}\$where \$l\$ is the length of the pendulum and \$g\$ is the acceleration due to gravity.We know that \$g_{pole}> g_{equator}\$\$\implies \ T_{pole}<T_{equator}\$Thus time period of simple pendulum decreases when it is taken from equator to pole.

Q: How much time does the bob of a seconds pendulum take to move from one extreme to the other extreme of its oscillation ?

Time period of second's pendulum is 2s hence the time taken from one extreme to another is half of the time period.\$\dfrac{2}{2} = 1 s\$

Q: Which of the following does not express a time interval?

The correct answer is option (d) Time of the first bell in the school.

Q: Which of the following physical quantities has same unit in all the three system of units?

\$LENGTH\$ \$MASS\$ \$TIME\$ \$M.K.S\$ Meter killogram sec \$C.G.S\$ Centi meter gram sec \$S.I.\$ meter killogram sec The unit of time (i.e. second) is the same in all the three systems of units.

Q: A simple pendulum is set into vibrations. The bob of the pendulum comes to rest after some time due to

Air friction causes the oscillating pendulum to damp and thus eventually it comes to rest after some time.

Q: How do you measure the time period of a given pendulum? Why do you note the time for more than one oscillation ?

Time period is the time taken by the body to complete one oscillation and it is noted more than once to get accurate reading from averaging of all the observed values.

Q: Interval between two events is called

Interval between two events is known as Duration. For example : A work start at 10 AM and it ends 12 AM. Duration of work will be 2 hr.

Q: Which one of the following can not be used for measurement of time ?

"A leaking tap" is the answer because we cannot estimate when will the drop fall.where as⇒ simple pendulum shows time by its to and fro motion.⇒ in olden days the time is estimated by the shadow of an object⇒ blinking of eyes is rarely seen which blinks by time unless by reflex actions

Q: Precise measurements of physical quantities are a need of science. For example, to as certain the speed of an aircraft, one must have an accurate method to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. Think of different examples in modern science where precise measurements of length, time, mass etc. are needed. Also, wherever you can, give a quantitative idea of the precision needed.

Precise measurement of physical quantity is truly needed.For example, 1) Ultra-shot laser pulses (time interval 1015 s) are used to measure time intervals in several physical and chemical processes.2) X-ray spectroscopy is used to determine the inter-atomic separation or inter-planer spacing. 3) The development of mass spectrometer helps to measure mass of atom precisely.

Question 1

When a simple pendulum is taken from the Equator to the Pole, its period of oscillation will :

Accepted Answer

Time period of simple pendulum is given by   $T =2\pi\sqrt{\dfrac{l}{g}}$where  $l$ is the length of the pendulum and $g$ is the acceleration due to gravity.We know that $g_{pole}> g_{equator}$$\implies \ T_{pole}<T_{equator}$Thus time period of simple pendulum decreases when it is taken from equator to pole.

Question 2

How much time does the bob of a seconds pendulum take to move from one extreme to the other extreme of its oscillation ?

Accepted Answer

Time period of second's pendulum is 2s hence the time taken from one extreme to another is half of the time period.$\dfrac{2}{2} = 1  s$

Question 3

What is simple pendulum ? Find an expression for the time period and frequency of a simple pendulum.

Accepted Answer

Toppr Ask Answer

Question 4

Which of the following does not express a time interval?

Accepted Answer

The correct answer is option (d) Time of the first bell in the school.

Question 5

Which of the following physical quantities has same unit in all the three system of units?

Accepted Answer

$LENGTH$ $MASS$ $TIME$ $M.K.S$ Meter killogram sec $C.G.S$ Centi meter  gram sec $S.I.$ meter killogram sec The unit of time (i.e. second) is the same in all the three systems of units.

Question 6

A simple pendulum is set into vibrations. The bob of the pendulum comes to rest after some time due to

Accepted Answer

Air friction causes the oscillating pendulum to damp and thus eventually it comes to rest after some time.

Question 7

How do you measure the time period of a given pendulum? Why do you note the time for more than one oscillation ?

Accepted Answer

Time period is the time taken by the body to complete one oscillation and it is noted more than once to get accurate reading from averaging of all the observed values.

Question 8

Interval between two events is called

Accepted Answer

Interval between two events is known as Duration. For example : A work start at 10 AM and it ends  12 AM. Duration of work will be 2 hr.

Question 9

Which one of the following can not be used for measurement of time ?

Accepted Answer

&#34;A leaking tap&#34; is the answer because we cannot estimate when will the drop fall.where as&#8658; simple pendulum shows time by its to and fro motion.&#8658; in olden days  the time is estimated by the shadow of an object&#8658; blinking of eyes is rarely seen which blinks by time unless by reflex actions

Question 10

Precise measurements of physical quantities are a need of science. For example, to as certain the speed of an aircraft, one must have an accurate method to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. Think of different examples in modern science where precise measurements of length, time, mass etc. are needed. Also, wherever you can, give a quantitative idea of the precision needed.

Accepted Answer

Precise measurement of physical quantity is truly needed.For example, 1) Ultra-shot laser pulses (time interval  1015 s) are used to measure time intervals in several physical and chemical processes.2) X-ray spectroscopy is used to determine the inter-atomic separation or inter-planer spacing. 3) The development of mass spectrometer helps to measure mass of atom precisely.

Measurement of time using Simple Pendulum

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Measurement of Time by a Simple Pendulum

Concept of Time - Simple Pendulum.

Measuring Short Intervals of Time

QUICK SUMMARY WITH STORIES

Working of a simple pendulum

Time period of simple pendulum

Measurement of Time- Basic and other units

Seconds Pendulum