Question

A wave travelling along a stretched string is represented by y = 3 cosp (100 t – x). Its wavelength is -

• A. 3 cm
• B. 100 cm
• C. 2 cm
• D. 5 cm

Answer 1

Answer: (C)

2 cm

Answer 2

Q y = 3 cos [100pt – 100px]

y = a cos [wt – kx]

\ k = 100p \$\frac{2\pi}{\lambda}$= 100p \ l = 2 cm