If the 47th division of the circular scale coincides with the zero of the main scale of a screw gauge of least count 0.01 mm and having 50 circular divisions, what is it's zero error?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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We can find the diameter of a wire by wrapping it around a pencil and measuring the length of turns with the help of a meter scale. Is this approach more accurate than determining the diameter of the wire with the help of a screw gauge?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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The following figure shows the reading of a vernier caliper used for measuring the thickness of a metal sheet.
(i) Find the least count of the instrument.
(ii) Calculate the thickness of the metal sheet.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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What is meant by the pitch of a screw gauge? The pitch of a screw is 1 mm.
Find the reading of the instrument shown in the following figure.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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A screw thread has 20 threads in 1 cm and its circular scale has 50 divisions. Calculate its pitch and least count.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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The following diagrams (Fig. 5) show the use of a vernier caliper under three different situations. Study the diagrams carefully and note down the vernier readings in each case.
(a) Measuring the diameter of the rod
(b) Measuring Internal diameter of a cavity
(c) Measuring depth of a cavity
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Describe in steps, how would you use a vernier caliper to measure the length of a small rod?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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What is meant by zero error of a vernier caliper? How is it determined? Draw neat diagrams to explain it. How is it taken into account to get the correct measurement?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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What is meant by zero error of a vernier caliper? How is it determined? Draw neat diagrams to explain it. How is it taken into account to get the correct measurement?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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How will you record your observations while measuring the volume of an irregular solid by the displacement method using a cylinder?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Why does the velocity of a stone thrown vertically upwards decreases?
[3] Laws of Motion
Chapter: [3] Laws of Motion
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Two friends leave Delhi for Chandigarh in their cars. A starts at 5 am and moves with a constant speed of 30 km/h, whereas B starts at 6 am and moves with a constant speed of 40 kmh-1. Plot the distance-time graph for their motion and find at what time the two friends will meet and at what distance from Delhi.
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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A body moves along a straight road with a speed of 20 m/s and has a uniform acceleration of 5 m/s2. What will be its speed after 2 s?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Write down the type of motion of a body in each of the following distance time-graph.
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Define speed. What is its S.I. unit?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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What does the slope of a displacement-time graph represent?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Draw a displacement-time graph for a boy going to school with uniform velocity.
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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What does the slope of velocity-time graph represent?
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Draw a velocity-time graph for the free fall of a body under gravity starting from rest. Take g = 10m s-2
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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For uniform motion _________
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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