Question

Determine modulus of rigidity of material of wire by torsional pendulum

Answer 1

Answer:

PART 1: Determination of Rigidity modulus using Torsion pendulum alone. The radius of the suspension wire is measured using a screw gauge. The length of the suspension wire is adjusted to suitable values like 0.3m,0.4m,0.5m,.....0.9m,1m etc.

Answer 2

Young's modulus and shear modulus can both be measured using the Searle apparatus, the Maxwell needle method, and a torsional pendulum.

Explanation:

• A screw gauge is used to calculate the suspension wire's radius.
• Suitable values are set for the suspension wire's length.
• At the disc's bottom and the bracket's top, the test wire is cinched tightly.
• The cylindrical weights are removed, and the disc is then rotated and released.
• A stopwatch is used to measure the length of time required for a number to oscillate (let's say it's 20), and the result is the mean period of oscillation, or "T0."

• A rigid body suspended by a wire or thread makes up a torsional pendulum. Between =+ and =, the stiff body oscillates. Modeling suggests that the restoring torque is proportional to the angle: =.

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