Physics Class 9 Practical 16 Important Viva Questions with Answers (helical spring )

PRACTICAL 16

To study the relationship between load and extension (Helical spring) by drawing a graph.

VIVA VOCE

 

Q1: What is the aim of the experiment?

A1:The aim of the experiment is to study the relationship between load and extension in a helical spring by drawing a graph.

Q2: What is Hooke's Law?

A2:Hooke's Law states that the extension of a spring is directly proportional to the load applied to it, provided the elastic limit is not exceeded.

Q3: How do you calculate the spring constant (k)?

A3:The spring constant (k) is calculated using the formula \( k = \frac{F}{x} \), where \( F \) is the load applied and \( x \) is the extension produced.

Q4: What is the elastic limit?

A4:The elastic limit is the maximum load that a spring can bear without undergoing permanent deformation.

Q5: Describe the procedure of the experiment briefly.

A5:The procedure involves hanging the helical spring vertically, adding known weights incrementally, measuring the corresponding extensions, and recording the data. The load versus extension graph is then plotted.

Q6: What type of graph do you expect from this experiment?

A6: A straight-line graph passing through the origin, idicating a linear relationship between load and extension.

Q7: How do you ensure accuracy in your measurements?

A7: Accuracy can be ensured by using precise instruments, taking multiple readings for each load, and avoiding parallax errors while reading the scale.

Q8: What does the slope of the load-extension graph represent?

A8: The slope of the load-extension graph represents the spring constant (k).

Q9: Why is it important not to exceed the elastic limit during the experiment?

A9: Exceeding the elastic limit can cause permanent deformation to the spring, making Hooke's Law no longer applicable and leading to inaccurate results.

Q10: How would you identify if the spring has been permanently deformed?

A10: Permanent deformation can be identified if the spring does not return to its original length after the load is removed or if the load-extension graph deviates from a straight line.

Q11: What are the potential sources of error in this experiment?**

A11: Potential sources of error include inaccurate measurements of load and extension, parallax error, non-uniform spring material, and not accounting for the initial tension in the spring.

Q12: How can you minimize these errors?

A12 Errors can be minimized by calibrating the measuring instruments, taking multiple readings and averaging them, ensuring proper alignment of the spring, and handling the spring gently to avoid any initial tension or damage.

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