The Digital Scholar

  PRACTICAL 8 To determine the value of 'g' by Atwood's Machine VIVA VOCE 1.  What is the purpose of conducting the Atwood's machine experiment?    Ans: The purpose is to determine the acceleration due to gravity (g) using the Atwood's machine setup. 2.  Describe the Atwood's machine setup.  Ans: The Atwood's machine consists of a pulley with a string passing over it. Two masses of different weights are suspended on either end of the string. 3. How does the Atwood's machine work?   Ans: When the masses are released, they experience a net force due to the difference in their weights. This causes an acceleration of the system. 4. What is the relationship between the masses and the acceleration in Atwood's machine?    Ans: According to Newton's second law, the acceleration of the system is directly proportional to the net force acting on it, which is the difference in weights of the masses. 5.  How will you measure the acceleration in the Atwood'

  PRACTICAL 7 Measure the force of limiting friction by rolling a roller on a horizontal plane VIVA VOCE 1.  What is the objective of this practical?    Ans: The objective is to measure the force of limiting friction by rolling a roller on a horizontal plane. 2. What equipment will you use for this experiment?    Ans: We will use a roller, a horizontal plane, weights, a spring balance, and a marker. 3.  How will you set up the experiment?    Ans: Place the roller on the horizontal plane and attach the spring balance to it. Add weights to the roller gradually until it starts to move. Mark the position where the roller begins to move. 4. What is limiting friction?    Ans: Limiting friction is the maximum force of friction that can be exerted between two surfaces before motion starts. 5.  How will you calculate the force of limiting friction?    Ans: The force of limiting friction will be equal to the weight applied to the roller when it just begins to move. 6.  Why is it important to mar

  PRACTICAL 6 Investigate the relationship between force of limiting friction and normal reaction to find the co-efficient of sliding friction between a wooden block and horizontal surface. VIVA VOCE 1. What is the objective of investigating the relationship between the force of limiting friction and the normal reaction?    - The objective is to determine the coefficient of sliding friction between a wooden block and a horizontal surface. 2. How do you set up the experiment to investigate this relationship?    - Place the wooden block on a horizontal surface and gradually increase the applied force until the block just starts to slide. Measure the normal reaction force and the applied force at this point. 3. What is the normal reaction force, and how is it related to the weight of the wooden block?    - The normal reaction force is the force exerted by the surface perpendicular to the contact surface. It is equal in magnitude and opposite in direction to the weight of the wooden block.

  PRACTICAL 5 To find the value of “g” by free fall method VIVA VOCE 1. What is the purpose of the free fall method in finding the value of "g"?    - The purpose is to experimentally determine the acceleration due to gravity, denoted by "g." 2. How do you set up the experiment for the free fall method?    - Drop a small object from a known height and measure the time it takes to fall using a stopwatch. 3. What precautions should be taken during the experiment to ensure accurate results?    - Ensure the experiment is conducted in a vacuum or an environment with minimal air resistance, use a precise stopwatch, and repeat the experiment multiple times to reduce errors. 4. How do you measure the height from which the object is dropped?    - Measure the height using a meter stick, ruler, or another measuring device with precision. 5. What is the equation used to calculate the acceleration due to gravity (g) using the free fall method?    - \( g = \frac{{2h}}{{t^2}} \),

  PRACTICAL 4 To find the acceleration of a ball rolling down an angle iron by drawing a graph between 2S and T2 VIVA VOCE 1. How do you set up the experiment to find the acceleration of a ball rolling down an angle iron? Ans: Place the angle iron on a smooth surface, ensuring it is securely fixed. Release the ball from the top of the angle iron and measure the time it takes to travel a known distance. 2. What is the purpose of drawing a graph between \( 2S \) and \( T^2 \)? Ans: The purpose is to determine the acceleration of the ball by analyzing the relationship between the square of the time taken (\( T^2 \)) and twice the distance traveled (\( 2S \)). 3. How do you measure the distance traveled by the ball (S)? Ans: Measure the horizontal distance covered by the ball from its starting point to its final position. 4. How do you measure the time taken by the ball (T)? Ans: Use a stopwatch or a similar device to measure the time it takes for the ball to travel the known distance alon

  PRACTICAL #3 To measure the thickness of a metal strip or a wire by using a screw gauge VIVA VOCE 1. How would you ensure the screw gauge is properly calibrated before beginning the measurements? Ans:  Calibrate the screw gauge by ensuring the zero mark aligns accurately with the reference point when no object is being measured. 2. What factors should be considered when selecting the appropriate screw gauge for measuring the thickness of a metal strip or wire? Ans: Choose a screw gauge with an appropriate range that can accommodate the thickness of the metal strip or wire. Consider the pitch and resolution of the screw gauge as well. 3. Can you describe the procedure for measuring the thickness of a metal strip or wire using a screw gauge? The procedure involves gently placing the metal strip or wire between the anvils of the screw gauge, carefully rotating the thimble until it makes light contact with the object, and then reading the measurement from the scale and thimble. 4. What p

  PRACTICAL 2: To measure the area of cross section by measuring diameter of a solid cylinder with Vernier Calipers. VIVA VOCE 1. How would you ensure that the solid cylinder is placed correctly between the jaws of the vernier calipers for accurate measurement? Ans: Ensuring the cylinder is perpendicular to the jaws and gently placing it between them ensures accurate placement. 2. What precautions should be taken to minimize errors while measuring the diameter of the cylinder with vernier calipers? Ans: Precautions include avoiding parallax error, ensuring proper alignment, and using a steady hand during measurement. 3. Can you explain how the vernier scale aids in obtaining more precise measurements compared to the main scale? Ans. The vernier scale provides finer divisions than the main scale, allowing for more precise readings. 4. Describe the procedure for reading the measurement of the diameter on the vernier calipers. Ans. To read the measurement, align the zero mark of the vern