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Standard XII

Physics

Need for Intensity

Two blocks ea...

Question

Two blocks each having a mass of $3.2 k g$ are connected by a wire CD and the system is suspended from the ceiling by another wire AB. The linear density of wire AB is $10 g m / m$ and that of CD is $8 g m / m$ . The speed of transverse pulse in AB is

63 m / s

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49 m / s

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42 m / s

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80 m / s

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Solution

The correct option is B $80 m / s$
Tension $T = 2 (3.2) \times 9$
$∴$ velocity $v = \sqrt{\frac{T}{μ}} = \sqrt{\frac{6.4 \times 10}{10 \times 10^{- 3}}}$
$\sqrt{6.4 \times 10^{3}} = 80 m s^{- 1}$
for the part AB both blocks will produce Tension

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Two blocks each having a mass of 3.2kg are connected by a wire CD and the system is suspended from the ceiling by another wire AB. The linear density of wire AB is 10gm/m and that of CD is 8gm/m. The speed of transverse pulse in AB is

The correct option is B 80m/sTension T=2(3.2)×9∴ velocity v=√Tμ=√6.4×1010×10−3√6.4×103=80 ms−1for the part AB both blocks will produce Tension

Two blocks each having a mass of $3.2 k g$ are connected by a wire CD and the system is suspended from the ceiling by another wire AB. The linear density of wire AB is $10 g m / m$ and that of CD is $8 g m / m$ . The speed of transverse pulse in AB is

The correct option is B $80 m / s$
Tension $T = 2 (3.2) \times 9$
$∴$ velocity $v = \sqrt{\frac{T}{μ}} = \sqrt{\frac{6.4 \times 10}{10 \times 10^{- 3}}}$
$\sqrt{6.4 \times 10^{3}} = 80 m s^{- 1}$
for the part AB both blocks will produce Tension