Class 12

29. Electron, Photon, Photoelectric Effect & X-Ray question bank (Physics)

Practice 663 free Class 12 Physics - 29. Electron, Photon, Photoelectric Effect & X-Ray questions with answers and step-by-step solutions.

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Q1.

Transverse waves of the same frequency are generated in two steel wires \(A\) and \(B\). The diameter of \(A\) is twice that of \(B\) and the tension in \(A\) is half that in \(B\). The ratio of the velocities of waves in \(A\) and \(B\) is  

(A)
\(1 : 2\)
(B)
\(1 : \sqrt{2}\)
(C)
\(2\sqrt{2}\)
(D)
\(3 : 2\sqrt{2}\)
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Q2.

Which one of the following equations represents a wave travelling along \(y\)-axis?  

(A)
\(y = A \sin(kx - \omega t)\)
(B)
\(x = A \sin(ky - \omega t)\)
(C)
\(y = A \sin(ky) \cos(\omega t)\)
(D)
\(y_1 = A \cos(ky) \sin(\omega t)\)
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