30. A large ripple tank with a vibrator working at a frequency of 30 Hz produces 25 complete waves in a distance of 50 cm. The velocity of the wave is:
(A) 53 cms-1(B) 60 cms-1(C) 750 cms-1(D) 1500 cms-1
29. Waves transfer:
(A) Energy(B) Frequency(C) Wavelength(D) Velocity
29. Waves transfer: Read More »
28. Which of the following devices can be used to produce both a transverse and longitudinal wave?
(A) A string(B) Ripple tank(C) A helical spring (slinky)(D) A tuning fork
27. IF the mass of the bob of a pendulum is increased a factor of 3, the period of the pendulum’s motion will:
(A) By increased by a factor of 2(B) Remain same(C) Be decreased by a factor of 2(D) Be decreased by a factor of 4
26. Which of the following is an example of simple harmonic motion?
(A) Motion of a simple pendulum(B) The motion of ceiling fan(C) The spinning of the earth on its axis(D) A bouncing ball on a floor
26. Which of the following is an example of simple harmonic motion? Read More »
25. The refraction of waves occurs due the change in their?
(A) Wavelength(B) Frequency(C) Speed(D) Time period
25. The refraction of waves occurs due the change in their? Read More »
24. Crests of waves in a ripple tank behave like convex lens and:
(A) Appear as dark fringes(B) Appear as coloured fringes(C) Converge the light(D) Diverge the light
24. Crests of waves in a ripple tank behave like convex lens and: Read More »
23. In ripple tank the troughs of waves appear on white paper is?
(A) Bright lines(B) Dark lines(C) Color lines(D) None of these
23. In ripple tank the troughs of waves appear on white paper is? Read More »
22. When water waves enters the region of shallow their waves length?
(A) Decrease(B) Increase(C) Zero(D) Remain same
22. When water waves enters the region of shallow their waves length? Read More »
21. Which wave cannot pass through vacuum?
(A) Sound waves(B) Radio waves(C) T.V waves(D) Light waves
21. Which wave cannot pass through vacuum? Read More »