Physics, SSC-Punjab Class 10. This chapter is split into 33 topics and has
843 practice questions. The topics covered are listed below, followed by
10 free sample questions from the chapter.
Tsunami speed and distance calculations27 questions
Tsunami behaviour in shallow water23 questions
Electromagnetic waves and the spectrum26 questions
Frequency from number of cycles and time30 questions
Refraction of waves23 questions
Seismic waves and P-waves22 questions
Wave speed v = f x wavelength30 questions
Ripple tank and water wave experiment24 questions
Amplitude and wave energy23 questions
Frequency and time period concepts25 questions
Wave equation derivation and meaning24 questions
Wavelength from speed and frequency30 questions
Wave front22 questions
Common misconceptions about waves22 questions
Wave equation proportional reasoning30 questions
Transverse waves25 questions
Examples of wave motion: spring, rope, guitar23 questions
Diffraction around obstacles and in daily life23 questions
Wavelength24 questions
Time period and frequency30 questions
Exercise style questions on waves27 questions
Tsunami causes and nature21 questions
Mixed wave equation problems30 questions
Longitudinal waves25 questions
Mechanical waves23 questions
Sample questions: Waves
10 sample questions with the correct answer and an explanation. Try to answer each one before reading the explanation.
Q1. What does a wave transfer from one place to another?
A. Water particles
B. Mass of the medium
C. Energy(correct answer)
D. Matter
Answer: C.A wave carries energy from place to place; the particles of the medium only vibrate about their rest positions and are not carried along.
Q2. A cork floats on a water surface. As a wave passes it, the cork bobs up and down and returns to nearly the same place. What does this show?
A. Waves transfer both water and energy to the shore
B. Waves transfer energy without transferring the water itself(correct answer)
C. Waves can only move objects that are lighter than water
D. Waves pass through the cork without affecting it at all
Answer: B.The cork only oscillates, so the water particles are not carried with the wave, yet the wave still delivers energy that makes the cork move.
Q3. Why does a person at the far end of a long rope feel a jerk when the other end is flicked, even though no part of the rope travels the whole length?
A. The rope as a whole shifts forward by the length of the wave
B. Air carries the jerk along the rope to the other end
C. Each part of the rope passes the disturbance to the next part(correct answer)
D. The flicked piece of rope slides all the way to the other end
Answer: C.Neighbouring portions of the rope pass the vibration on, so energy reaches the far end while each portion moves only a short distance.
Q4. Two students send a pulse along a long stretched rope. The pulse takes 4 s to travel 20 m. How far does a single point on the rope travel during the same time (ignoring its small up-and-down motion)?
A. About 20 m along the rope, the full distance
B. About 10 m along the rope, half the distance
C. About 5 m along the rope, a quarter of the way
D. Essentially no distance along the rope(correct answer)
Answer: D.The wave travels 20 m, but each point of the rope merely oscillates about its own position and so has no net movement along the rope.
Q5. A twig is dropped into still water and ripples spread. Which description of the ripples is most accurate?
A. Moving rings of disturbance that carry energy outward(correct answer)
B. Water being thrown outward from the point of impact
C. Floating rings of water that circle the twig
D. Lumps of water that slide over the water below
Answer: A.Ripples are travelling disturbances that carry the energy of the twig's impact outward across the surface; the water does not flow outward.
Q6. Which wave type is seen when a stretched slinky is shaken sideways, perpendicular to its length?
A. Transverse(correct answer)
B. Longitudinal
C. Compressional
D. Rarefactional
Answer: A.Shaking the slinky at right angles to its length gives a transverse wave in which coils vibrate perpendicular to the direction of travel.
Q7. How does a rope wave differ from a spring wave in the direction of particle motion relative to wave travel?
A. Both move parallel to wave travel
B. Rope parts move parallel; spring coils move at right angles
C. Both move at right angles to wave travel
D. Rope parts move at right angles; spring coils move parallel(correct answer)
Answer: D.On the rope, the wave is transverse (vibration perpendicular to travel); on the pushed spring it is longitudinal (vibration parallel to travel).
Q8. Which of the following is NOT a part of the ripple tank apparatus?
A. A screen below the tray
B. A bell jar(correct answer)
C. A shallow water tray
D. A lamp
Answer: B.A bell jar belongs to the sound-in-vacuum experiment, not to the ripple tank, which has a tray, vibrator, lamp, screen and metre rule.
Q9. Which statement about electromagnetic waves is correct?
A. They are longitudinal compression waves of air
B. Their particles vibrate along the direction of travel of the wave
C. Their electric and magnetic fields oscillate at right angles to the direction of travel(correct answer)
D. They are made of vibrating coils like a long spring
Answer: C.In electromagnetic radiation the electric and magnetic fields oscillate perpendicular to the direction of energy propagation, so they are transverse.
Q10. Why does sound with a long wavelength diffract around an obstacle more easily than sound with a short wavelength?
A. Waves bend more when their wavelength is large compared with the obstacle(correct answer)
B. Long waves are faster than short waves in every case
C. Waves bend less when their wavelength is large compared with the obstacle
D. Long waves cannot be absorbed by obstacles
Answer: A.Diffraction is greater when the gap or obstacle size is close to or smaller than the wavelength; longer wavelength means more bending.