Two different wire A and B of same cross sectional area are joined to form a composite wire of length 1.5m of which wire A is 0.6 m and the rest is wi

Question

Two different wire A and B of same cross sectional area are joined to form a composite wire of length 1.5m of which wire A is 0.6 m and the rest is wi

Two different wire A and B of same cross sectional area are joined to form a composite wire of length 1.5m of which wire A is 0.6 m and the rest is wire B. The densities of A and B are in the ratio 1:4 when the joint in the wire is a node , then the number of loops formed in A and B are in the ratio
A. `2:3`
B. `3:2`
C. `1:2`
D. `1:3`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
`l_1=0.6, l_2 = 0.9 , rho_1/rho_2 = 1/4 , P_1/P_2 = ?`
`n_1 = n_2`
`P_1l_1 sqrt(T/rho_1) = P_2/l_2sqrt(T/rho_2)`
`P_1/P_2 = l_1/l_2 sqrt(rho_1/rho_2`
`=(0.6)/(0.9) xx sqrt(1/4) = 2/3xx1/2 = 1/3`

4 views Answered 2023-02-05 15:29