YOUNG'S MODULUS APPARATUS – SEARLE'S PATTERN

The Young's Modulus Apparatus – Searle's Pattern is designed for accurate determination of the Young's modulus of metallic wires by measuring their extension under an applied load. The apparatus employs the standard Searle's method, where the extension of the experimental wire is measured relative to a reference system.

The unit consists of two rigid iron frames, each provided with a ceiling bracket and self-centering chuck for securely holding the wires. One frame is fitted with a precision micrometer screw for measuring the extension. The micrometer provides a fine measurement resolution of 0.01 mm and incorporates a 0–10 mm main scale.

A sensitive spirit level is pivoted at one end to one of the frames, while its other end rests on the point of the micrometer screw mounted on the second frame. This arrangement enables small changes in the length of the test wire to be detected and measured accurately.

Specifications:

• Item: Young's Modulus Apparatus
• Pattern: Searle's Pattern
• Application: Determination of Young's Modulus
• Frames: Two rigid iron frames
• Mounting: Ceiling brackets provided
• Wire Holding: Self-centering chucks
• Micrometer: Precision micrometer screw
• Micrometer Least Count:0.01 mm
• Main Scale Range:0–10 mm
• Level: Sensitive spirit level
• Level Arrangement: Pivoted on one frame and supported by micrometer point on the other
• Measurement: Small extension in the test wire
• Principle: Measurement of strain produced by an applied load
• Suitable For: Physics practical laboratories, schools, colleges and universities

Educational Use:
The apparatus enables students to experimentally determine Young's modulus by studying the relationship between the applied load and the resulting extension of a wire.