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In searle's apparatus we have two wires....

In searle's apparatus we have two wires. During experiment we study the extension in one wire the use of second wire is

A

to support the apparatus because it is heavy and may not break sigle wire

B

to compensate the changes in length caused by changes in temperature of atmosphere during experimentation

C

to keep the apparatus in level so that extension is measured accurately

D

all the three above

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • If we use very thin and long wire, then

    A
    Sensitivity `(("output")/("input")=(DeltaX)/(DeltaW))` of experiment increases
    B
    Young's modulus will remain unchanged
    C
    Wire may break or yield during loading.
    D
    All of the above

  • Using Searle's apparatus while determining the Young's modulus of a wire, a girl is taking measurements of different parameters : Length of the wire, L, is 30 cm, which is measured with a millimeter scale , diameter of the wire, d, is 1 mm, which is measured with a screw gauge. (Least count of the screw gause is 0.01 mm, least count of the spherometer attached to the apparatus frame is 0.005 mm, spherometer attached to the apparatus frame is 0.005 mm , spherometer measured the extension e of the wire , W is the weight of the loads.) The load versus extension graph should be (if the extension is in elastic limit)

    A
    straight line
    B
    curved line
    C
    broken line
    D
    any of the above

  • Using Searle's apparatus while determining the Young's modulus of a wire, a girl is taking measurements of different parameters : Length of the wire, L, is 30 cm, which is measured with a millimeter scale , diameter of the wire, d, is 1 mm, which is measured with a screw gauge. (Least count of the screw gause is 0.01 mm, least count of the spherometer attached to the apparatus frame is 0.005 mm, spherometer attached to the apparatus frame is 0.005 mm , spherometer measured the extension e of the wire , W is the weight of the loads.) The parameter that should be measured more carefully is

    A
    load on the hanger
    B
    length of the wire
    C
    diameter of the wire
    D
    extension of the wire

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    Using Searle's apparatus while determining the Young's modulus of a wire, a girl is taking measurements of different parameters : Length of the wire, L, is 30 cm, which is measured with a millimeter scale , diameter of the wire, d, is 1 mm, which is measured with a screw gauge. (Least count of the screw gause is 0.01 mm, least count of the spherometer attached to the apparatus frame is 0.005 mm, spherometer attached to the apparatus frame is 0.005 mm , spherometer measured the extension e of the wire , W is the weight of the loads.) The maximum fractional error in the measurement of Y is

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