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PART - 2 CH - 14 Waves Physics - PART - 2 CH - 14 Waves

Gujarat Board (GSEB) - STD 11 Science - Physics (GSEB - English Medium). 108 questions in this chapter.

Question types

PART - 2 CH - 14 Waves question types

108 questions across 8 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

108
Questions
8
Question groups
5
Question types
Sample Questions

PART - 2 CH - 14 Waves questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q (1 Marks)1 Mark
Instead of pulling a stretched string from the middle point if one of its end is touched at the middle point and is pulled at distance of 1/4th then the frequency of vibration is higher than that of the first wave.
  • A
    Same
  • ✓
    Twice
  • C
    Four times
  • D
    Half time

Answer: B.

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Q 2M.C.Q (1 Marks)1 Mark
The node point in stationary wave:
  • A
    Change in pressure and maximum displacement
  • B
    Change in pressure and displacement both is zero
  • C
    Change in pressure is zero and displacement maximum
  • ✓
    Maximum change in pressure and displacment is zero

Answer: D.

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Q 3M.C.Q (1 Marks)1 Mark
If the length of a stretched string is doubled and the tension is four times then new frequency will be times of old frequency.
  • ✓
    Equivalent
  • B
    One fourth
  • C
    Half
  • D
    Twice

Answer: A.

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Q 4M.C.Q (1 Marks)1 Mark
A tube with both open end its fundamental frequency is n. If half of tube is dipped in water vertically the fundamental frequency of air column.
  • A
    $2n$
  • ✓
    $n$
  • C
    $n/2$
  • D
    $3n/2$

Answer: B.

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Q 162 Marks Questions2 Marks
Earthquake generate wave within the earth unlike gasous. Earth can sense both transverse (s) and longitudnal ( $P$ ) waves. The speed of $S$ wave is about 4.0 $km S ^{-1}$ and speed of $P$ wave is about $8 km s ^{-1}$. A seismometer records the $P$ and $S$ wave of an earth quake. The first $P$ wave arrives 4 minute earlier than first $S$ wave. Assuming that the wave travels in straight line. Find out what is the distance to the place where the earthquake occur.
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Q 172 Marks Questions2 Marks
One end of a long string of linear mass density $8.0 \times 10 kg . m ^{-1}$ is connected to an electrically operated tunning fork of frequency 256 Hz . The other end of the string is passed over a stationary pulley and tied to the scale of a balance on which 90 kg weight are hanging. The pulley end absorb all the incoming energy due 90 which the amplitude of the waves reflected from this end is negligible. At $t=0$ the transverse displacement at the left end of the string at $x=0$ is zero $(y=0)$ and it is moving along the positive direction. The amplitude of the wave is 5.0 cm write the transverse displacement $y$ describe this wave on the string as a function of $X$ and $t$.
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Q 182 Marks Questions2 Marks
To open ended pipes standing near each other are played together. Prove that the length of one pipe among them is $y cm$. When converted to $\frac{ v y}{2 l^2}$ approximately. Length of pipe $l$ and speed of sound in velocity $v$.
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Q 192 Marks Questions2 Marks
A disturbance pulse takes 0.2 second to travel across a long wire and return. Tension is created in the wire by continuously hanging a weight 100 times the total weight of the wire on a pulley. Find the total length of the wire. Here g = 9.8 m/s.
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Q 245 Marks Questions5 Marks
A progressive harmonic wave on a string is expressed as follow
$
y(x, t)=7.5 \sin (0.0050 x+12 t+\pi / 4)
$
(a) Find the speed at a point $x=1 cm$ on time $t=1$ sec. Is this speed is equal to the speed of wave propagation?
(b) Find the location of those points of the string whose tranverse displacement and speed are the same as that of the point located at $x=1 cm$ at times $t =2 s, 5 s$ and $11s.$
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Q 255 Marks Questions5 Marks
Define the following :
(i) Frequency (ii) Time period (iii) Amplitude (iv) Wave length (v) Phase angle (vi) Angular frequency (vii) Propagation con (viii) Wave velocity.
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Q 275 Marks Questions5 Marks
Calculate the frequency of the original tone in stretched cord. Explain the fundamental and overtones of a string and prove that both even and odd harmonics are produced in the string.
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Q 285 Marks Questions5 Marks
Write a labelled diagram of resonance tube and explain it. With its help establish formulas to determine the velocity of sound.
OR
Make a labelled diagram of resonance tube and describe its structure and establish the formula to find the velocity of sound at room temperature.
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Q 34Match the following.5 Marks
AB
1. When both waves are superimposed in the opposite phase at any place then the value of resultant amplitude and intensity(A) Minimum
2. In interference there is a phase difference at some point of the medium(B) Fix
3. In beats there is a phase difference between the waves at any point in the medium(C) 1:3:5
4. The frequency of vibrations produced in a close organ pipe are in the ratio(D) 1:2:3
5. Generated in open organ pipe there is a ratio of frequency of vibrations(E) Changes
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Q 35Match the following.5 Marks
AB
1. When both waves are superimposed in the opposite phase at any place then the value of resultant amplitude and intensity(a) Fix
2. In interference there is a phase difference at some point of the medium(b) $1:3:5$
3. In beats there is a phase difference between the waves at any point in the medium(c) $1:2:3$
4. The frequency of vibrations produced in a close organ pipe are in the ratio(d) Changes
5. Generated in open organ pipe there is a ratio of frequency of vibrations(e) Minimum
Q
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