Soal On Line Fisika Kelas Xii Semester I ( Gelombang Berjalan )

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| By Nurkholis_indaka
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Nurkholis_indaka
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Quizzes Created: 2 | Total Attempts: 4,227
| Attempts: 2,406
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  • 1/10 Pertanyaan

    Persamaan gelombang berjalan merupakan fungsi ....

    • A. Cosinus
    • B. Sinus
    • C. Tangen
    • D. Cotangen
    • E. Secan
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Soal On Line Fisika Kelas Xii Semester I ( Gelombang Berjalan ) - Quiz

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  • 2. 

    Seutas tali digetarkan memenuhi persamaan gelombang seperti berikut   Y  =  3 Sin ( 4phi.t - 2phi.x ) cm. Dari persamaan tersebut kecepatan sudut gelombang ....

    • 2phi

    • 3phi

    • 4phi

    • 5phi

    • 6phi

    Correct Answer
    A. 4phi
    Explanation
    The given equation represents a wave with a sinusoidal form. In the equation, the coefficient in front of the x term (2phi) represents the angular wave number, which is related to the spatial frequency of the wave. The angular wave number is equal to 2Ï€ times the number of wavelengths per unit distance. Therefore, the correct answer is 4phi, which represents a wave with a spatial frequency of 4 wavelengths per unit distance.

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  • 3. 

    Dari persamaan gelombang berjalan jika periode gelombang 5 sekon, maka kecepatan sudut gelombang adalah ....

    • 0,4 phi rad/sekon

    • 0,5 phi rad/sekon

    • 0,6 phi rad/sekon

    • 0,7 phi rad/sekon

    • 0,8 phi rad/sekon

    Correct Answer
    A. 0,4 phi rad/sekon
    Explanation
    The given question is asking for the angular velocity of a wave with a period of 5 seconds. The angular velocity is calculated by dividing 2Ï€ (phi) by the period. In this case, 2Ï€ divided by 5 seconds is equal to 0.4Ï€ rad/sec. Therefore, the correct answer is 0.4 phi rad/sec.

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  • 4. 

    Sebuah gelombang berjalan mempunyai panjang gelombang 2phi meter, maka bilangan gelombangnya adalah ....

    • 5 per meter

    • 4 per meter

    • 3 per meter

    • 2 per meter

    • 1 per meter

    Correct Answer
    A. 1 per meter
    Explanation
    The given question is asking for the wave number of a traveling wave with a wavelength of 2Ï€ meters. The wave number is defined as the number of waves per unit distance. Since the wavelength is given as 2Ï€ meters, which is the full wavelength of one wave, the wave number would be 1 per meter.

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  • 5. 

    Simpangan maksimum dalam sebuah gelombang berjalan disebut sebagai ....

    • Frekuensi

    • Periode

    • Kecepatan sudut

    • Amplitudo

    • Simpangan

    Correct Answer
    A. Amplitudo
    Explanation
    Amplitudo adalah simpangan maksimum dalam sebuah gelombang berjalan. Simpangan maksimum ini menggambarkan jarak maksimum partikel dalam gelombang bergerak dari posisi keseimbangan. Dalam hal ini, simpangan maksimum mengacu pada jarak maksimum yang dicapai oleh partikel dalam gelombang saat bergerak. Frekuensi, periode, dan kecepatan sudut adalah konsep-konsep yang berbeda dalam gelombang dan tidak mencerminkan simpangan maksimum.

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  • 6. 

    Jika selisih jarak gelombangnya 10 cm dan panjang gelombangnya 50 cm , maka beda fase  gelombangnya adalah ....

    • 1/3

    • 1/4

    • 1/5

    • 1/6

    • 1/7

    Correct Answer
    A. 1/5
    Explanation
    The given question asks for the difference in phase between two waves with a wavelength difference of 10 cm and a wavelength of 50 cm. The phase difference between two waves can be calculated using the formula: phase difference = (wavelength difference / wavelength) * 2Ï€. Plugging in the values, we get (10 cm / 50 cm) * 2Ï€ = 1/5. Therefore, the correct answer is 1/5.

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  • 7. 

    Persamaan gelombang berjalan dinyatakan sebagai  Y = 0,5 Sin 2 ( 4.t  -  8phi.x ) meter, maka periode gelombangnya adalah ....

    • 1/4 phi

    • 1/5 phi

    • 1/6 phi

    • 1/7 phi

    • 1/8 phi

    Correct Answer
    A. 1/4 phi
    Explanation
    The given equation for a traveling wave is Y = 0.5 Sin 2 (4t - 8phi.x) meter. To find the period of the wave, we need to determine the value of phi. In the equation, the coefficient of x is -8phi. Comparing this with the standard equation for a wave y = A Sin (kx - wt), we can see that the coefficient of x is related to the wave number k by the equation k = 8phi. The period of the wave is given by the formula T = 2pi/k. Substituting the value of k, we get T = 2pi/(8phi). Simplifying this expression, we find T = 1/(4phi). Therefore, the period of the wave is 1/4 phi.

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  • 8. 

    Gelombang berjalan seutas tali dinyatakan sebagai  Y = 8  Sin ( 3phi.t -  5 phi. x ) cm , maka bilangan gelombangnya adalah ....

    • 1 phi /cm

    • 2 phi /cm

    • 3 phi /cm

    • 4 phi /cm

    • 5 phi /cm

    Correct Answer
    A. 5 phi /cm
    Explanation
    The given equation for the wave is Y = 8 Sin (3phi.t - 5 phi.x) cm. The wave equation is in the form Y = A Sin (kx - wt), where A is the amplitude, k is the wave number, x is the position, w is the angular frequency, and t is the time. Comparing the given equation with the standard form, we can see that the wave number is 5 phi /cm.

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  • 9. 

    Gelombang berjalan dinyatakan  sebagai Y = 8  Sin ( 3phi.t +  5 phi. x ) cm, maka gelombang merambat ke ....

    • Ke kanan

    • Ke kiri

    • Ke atas

    • Ke bawah

    • Ke segala arah

    Correct Answer
    A. Ke kiri
    Explanation
    The given equation for a traveling wave is Y = 8 Sin (3phi.t + 5 phi.x) cm. In this equation, the term 3phi.t represents the phase of the wave in the time direction, while the term 5phi.x represents the phase of the wave in the spatial direction. Since the coefficient of x is positive (5phi), it indicates that the wave is propagating in the negative x-direction or to the left. Therefore, the correct answer is "ke kiri" which means "to the left" in English.

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  • 10. 

    Bila persamaan gelombang Y = - 8  Sin ( 3phi.t -  5 phi. x ) cm, maka arah getar mula-mula gelombang adalah ...

    • Ke kanan dan ke kiri

    • Ke kiri

    • Ke kanan

    • Ke atas

    • Ke bawah

    Correct Answer
    A. Ke bawah
    Explanation
    The given equation of the wave is Y = -8 Sin (3phi.t - 5phi.x) cm. The negative sign in front of the Sin function indicates that the wave is moving downwards. Therefore, the initial direction of vibration of the wave is downwards.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 21, 2012
    Quiz Created by
    Nurkholis_indaka

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