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14. waves and sound Physics - 14. waves and sound

Gujarat Board (GSEB) - STD 11 Science - Physics (GSEB - English Medium). 1,260 questions in this chapter.

Question types

14. waves and sound question types

1,260 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.

1,260
Questions
1
Question groups
5
Question types
Sample Questions

14. waves and sound 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
The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length is
  • A
    $3: 1$
  • B
    $1: 2$
  • ✓
    $2: 1$
  • D
    $1: 3$

Answer: C.

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Q 2M.C.Q (1 Marks)1 Mark
An organ pipe filled with a gas at $27^{\circ}\,C$ resonates at $400\,Hz$ in its fundamental mode. If it is filled with the same gas at $90^{\circ}\,C$, the resonance frequency at the same mode will be $...........\,Hz$
  • A
    $420$
  • ✓
    $440$
  • C
    $484$
  • D
    $512$

Answer: B.

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Q 3M.C.Q (1 Marks)1 Mark
If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is :
  • A
    $\sqrt{2}: 1$
  • ✓
     $1: \sqrt{2}$
  • C
    $1: 2$
  • D
     $1: 1$

Answer: B.

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Q 4M.C.Q (1 Marks)1 Mark
In a gultar, two strings $A$ and $B$ made of same materlal are slightly out of tune and produce beats of frequency $6\, Hz$. When tension in $B$ is slightly decreased, the beat frequency increases to $7 \,Hz$. If the frequency of $A$ is $530\, Hz ,$ the orlginal frequency of $B$ will be $.........Hz$
  • A
    $537$
  • B
    $523$
  • ✓
    $524$
  • D
    $536$

Answer: C.

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Q 5M.C.Q (1 Marks)1 Mark
The length of the string of a musical instrument is $90 \;cm$ and has a fundamental frequency of $120 \;Hz$. Where (In $cm$) should it be pressed to produce fundamental frequency of $180 \;Hz ?$
  • A
    $80$
  • B
    $75$
  • ✓
    $60$
  • D
    $45$

Answer: C.

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