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Young’s moduli of two wires A and B are in the ratio 7 : 4. Wire A is 2 m long and has radius R. Wire B is 1.5 m long and has radius 2 mm. If the two wires stretch by the same length for a given load, then the value of R is close to

(a)

1.3 mm

(b)

1.9 mm

(c)

1.5 mm

(d)

1.7 mm



Question ID - 51202 | SaraNextGen Top Answer

Young’s moduli of two wires A and B are in the ratio 7 : 4. Wire A is 2 m long and has radius R. Wire B is 1.5 m long and has radius 2 mm. If the two wires stretch by the same length for a given load, then the value of R is close to

(a)

1.3 mm

(b)

1.9 mm

(c)

1.5 mm

(d)

1.7 mm

1 Answer
127 votes
Answer Key / Explanation : (d) -

L =

 . rB

          =  = 1.7 mm

127 votes


127