Velocity of a Pulse Propagated Through a Slinky
 1) In longitudinal mode of wave propagation, how do the particles of the medium vibrate? Perpendicular to the direction of propagation. In the direction of propagation. Up and down. At random.

 2) In what material can transverse waves propagate? In gas. In metal. Both in gas and in metal. Neither in gas nor in metal.

 3) The wavelength of transverse wave is equal to: Distance between two consecutive crests Distance between two consecutive troughs Distance covered by one complete crest or trough All of these

 4) Which of the following is true of wave velocity? It is the number of waves produced per second. It is the product of wave frequency and wavelength. All of these. None of these.

 5) During a wave motion in a string, what does every particle do? Does not displace at all. Does not oscillate. Oscillates. Displaces from one end to the other end.

 6) What do we need to find the velocity of the pulse in a string? Only a stop watch. Only a measuring scale. Both a stop watch and a measuring scale. Neither a stop watch nor a measuring scale.

 7) A strong transverse horizontal pulse, created at one end of a string, is observed to complete five journeys along its length, before fading out. The initial and final readings, on a stop-clock used in the experiment, are as shown here. If the length of the string is L metre, the speed of the pulse, through the string, is: (L/9) ms⁻¹ (L/10) ms⁻¹ (L/45) ms⁻¹ (L/50) ms⁻¹

 8) What kind of waves can be produced on a slinky? Only a longitudinal wave. Only a transverse wave. Both a longitudinal wave and a transverse wave. Neither a longitudinal wave nor a transverse wave.

 9) Which of the following is true about the velocity of a pulse in a string? Velocity remains constant. Velocity increases. Velocity decreases. Velocity may increase or decrease.

 10) What happens when a pulse is formed on a slinky? The medium (slinky) oscillates for a long time. the medium (slinky) remains undisturbed. The medium (slinky) oscillates for a short while and then returns to its original undisturbed position. The medium (slinky) oscillates for a long while and then returns to its original undisturbed position.

 11) A student fixes two ends of a rope to two rigid supports- A and B placed at a distance of 7.5 m. He then gives a transverse horizontal jerk to create a pulse in the rope which moves from A to B, B to A, again from A to B and B to A.... and so on. The moment he gives jerk to the rope his friend immediately starts the stop watch. The pulse dies after completing three journeys from A to B and back. The pulse takes 1 min. and 15 seconds to complete its entire journey. What is the speed of the pulse moving on the rope? 0.6 ms⁻¹ 0.3 ms⁻¹ 0.2 ms⁻¹ 0.1 ms⁻¹

12)When a pulse produced in a slinky moves through it and strikes a rigid pole or a wall as shown in the diagram, it is reflected back and the shape of the reflected pulse resembles the shape given in:

 13) How should the point of creation of the pulse at one end of the string be kept with respect to the fixed point? Above. Below. In the same line. All of these.

 14) The pulse created by compressing the turns of the spring is: Longitudinal Transverse May be (a) or (b) Neither (a) nor (b)

 15) The pulse created and observed to move can be reflected_____. at one end only at both ends always in any part of the spring at both ends occasionally

 16) What happens when the pulse reaches the fixed end of the string? It is lost. It is refracted. It is reflected. Its velocity changes.

 17) Where is a pulse formed? In a small part of the medium. In a large part of the medium. In a vacuum. All of these.

 18) The string used should not be _________. with very small amplitude stretched along the ground having knots All of these

 19) How can you produce a waves pulse on a rope when one end is fixed? By giving a single jerk to the other end. By giving more jerks to the other end. By giving continuous jerks. All of these.

 20) How do you produce a transverse wave along a slinky? Free end is jerked at right angle to its length. Compress the free end. Pull the free end. None of these.

 21) Four students did their experiments on measuring the speed of a pulse through a string as follows: Student A stretched his thick cotton string very taut and gave it a very mild transverse horizontal jerk. Student B stretched his thin jute string just taut and gave it a mild transverse horizontal jerk. Student C stretched his thick cotton string just taut and gave it a strong transverse horizontal jerk. Student D stretched his thin jute string very taut and gave it a strong transverse horizontal jerk. Which student used the string correctly in the experiment? A B C D

 22) While doing the experiment on measuring the velocity of a pulse through a stretched string, a student had to choose between using (i) a thick silk string and a thick cotton string. (ii) a stop clock and a table clock. Which combination of choices is best for the experiment? Silk string and the table clock Silk string and the stop clock Cotton string and the table clock Cotton string and the stop clock

 23) How would you describe a slinky? A flexible helical spring made of steel. A long wire made of copper. A helical spring of any metal. Made of a PVC.

 24) How can we sense compression in a spring? Turns are farther apart than normal. Turns are close together. Turns are neither close or not. None of the above.

 25) When are compression and rarefaction seen? When the free end of the slinky is compressed for long time. When the free end of the slinky is compressed for short time. When the free end of the slinky is compressed periodically. None of the above.

 26) What is the formula for velocity of a pulse along a slinky? v = λ/T v = T/λ v = λ x T λ = v/T

 27) Shyam was calculating the velocity of wave using a slinky. He asked his teacher about the features of spring to be used. Which of the following describes the features that the spring should have? Long, soft and flexible Short, soft and flexible Short, hard and flexible Long, soft but not flexible

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