A. 20000 to 30000 hertz
B. 10 to 20 hertz
C. 2000 to 4000 hertz
D. 6000 to 8000 hertz
A. increases
B. decreases
C. remains unchanged
D. may increase or decrease
A. 1.61 ms-1
B. 61.0 ms-1
C. 0.61 ms-1
D. 2.00 ms-1
A. they are transverse waves
B. they are stationary waves
C. they require material medium for propagation
D. they do not have enough energy
A. refraction
B. polarization
C. interference
D. diffraction
A. decreases
B. increases
C. remains the same
D. any of above
A. decreases
B. increases
C. remains unchanged
D. becomes zero
A. matter waves
B. electromagnetic waves
C. carrier waves
D. mechanical waves
A. Dopplers effect
B. Interference of waves
C. Beats phenomena
D. All of these
A. Number of loops
B. Tension in the string
C. Point where string is plucked
D. both A and C