Which of the following statements is/are correct.
a. | Motion of a kink in a longitudinal spring produced by displacing one end of the spring sideways is transverse and longitudinal, both. |
b. | Waves produced in a cylinder containing a liquid by moving its piston back and forth is longitudinal. |
c. | Waves produced by a motorboat sailing in water are transverse and longitudinal, both. |
d. | Ultrasonic waves in air produced by a vibrating quartz crystal are longitudinal. |
1. (a), (b) and (d)
2. (b) and (d)
3. (a), (c) and (d)
4. All are correct
Which of the following functions of time represent/s periodic motion? [ω is any positive constant]
(a) sinωt + cosωt
(b) sinωt + cos2ωt + sin4ωt
(c) e–ωt
(d) log(ωt)
(e) sin2ωt
1. (a)
2. (a), (b) and (d)
3. (a), (b) and (e)
4. All