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A steel wire of length 1 m and diameter ...

A steel wire of length 1 m and diameter 0.2mm is elongated by 1mm due to a weight of 3.14kg. The Young's modulus of steel wire is

A

a)`9.8 xx 10^9 N/m^2`

B

b)`9.8 xx 10^10 N/m^2`

C

c)`9.8 xx 10^11 N/m^2`

D

d)`9.8 xx 10^12 N/m^2`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • If the wire of length 50cm elongater by 0.1 mm the strain is

    A
    a)0.1
    B
    b)0.002
    C
    c)0.0002
    D
    d)`2X10^-5`

  • A steel wire of diameter 1 mm and length 2 m is stretched by a force of 2kg .wt , what is the increase in the length of wire ? (Y = 2 xx 10^11 N/m^2,g = 9.8m/s^2)

    A
    a)`25 xx 10^(-5)m`
    B
    b)`2.5 xx 10^(-5) cm`
    C
    c)`2.5 xx 10^(-5) m`
    D
    d)`25 xx 10^(-5) cm`

  • A copper wire of length 1m and radius 1mm is joined in series with an iron wire of length 2m through the wires. The ratio of current densities in the copper and iron wires is

    A
    18:1
    B
    9:1
    C
    1:2
    D
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