Advertisements
Advertisements
प्रश्न
Two clocks A and B are shown in Figure 13.1. Clock A has an hour and a minute hand, whereas clock B has an hour hand, a minute hand as well as a second hand. Which of the following statement is correct for these clocks?
पर्याय
A time interval of 30 seconds can be measured by clock A.
A time interval of 30 seconds cannot be measured by clock B.
A Time interval of 5 minutes can be measured by both A and B.
The Time interval of 4 minutes 10 seconds can be measured by clock A.
उत्तर
A Time interval of 5 minutes can be measured by both A and B.
Explanation:
Clock A can not measure seconds as it has not a second hand. Clocks A and B both have minute hands, so a time interval of 5 minutes can be measured by both of them.
APPEARS IN
संबंधित प्रश्न
How is the time period of a simple pendulum affected, if at all, in the following situations:
- The length is made four times.
- The acceleration due to gravity is reduced to one-fourth.
Two simple pendulums A and B have lengths 1.0 m and 4.0 m, respectively, at a certain place. Which pendulum will make more oscillations in 1 min? Explain your answer.
State how does the time period of a simple pendulum depend on (a) length of pendulum, (b) mass of bob, (c) amplitude of oscillation and (d) acceleration due to gravity.
A simple pendulum completes 40 oscillations in one minute. Find its (a) Frequency and (b) Time period.
The frequency of sound is measured in ______.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
You can perform an interesting activity when you visit a park to ride a swing. You will require a watch. Make the swing oscillate without anyone sitting on it. Find its time period in the same way as you did for the pendulum. Make sure that there are no jerks in the motion of the swing. Ask one of your friends to sit on the swing. Push it once and let it swing naturally. Again measure its time period. Repeat the activity with different persons sitting on the swing. Compare the time period of the swing measured in different cases. What conclusions do you draw from this activity?
