Question 21. Which of the following pairs of the given function F(t) and its Laplace transform f(s) is NOT
CORRECT?

Question 22. A voltage regulator has ripple rejection of -50 dB. If input ripple is 1 mV, what is the output ripple
voltage in μV? The answer should be up to two decimal places. __________

Question 23. The number of spectral lines allowed in the spectrum for the 3 2D → 3 2P transition in sodium is
____________.

Question 24. The number of distinct ways of placing four indistinguishable balls into five distinguishable boxes
is ____________.

Question 25. The relativistic form of Newton's second law of motion is

Question 26. A uniform circular disk of radius R and mass M is rotating with angular speed w about an axis, passing through its center and inclined at an angle 60 degrees with respect to its symmetry axis. The magnitude of the angular momentum of the disk is,

Question 27. A charge distribution has the charge density given by ρ = Q{δ(x - x0) - δ(x + x0)}. For this
charge distribution the electric field at (2x0, 0,0)

Question 28. In a normal Zeeman effect experiment, spectral splitting of the line at the wavelength 643.8 nm corresponding to the transition 5 1D2 → 5 1P1 of cadmium atoms is to be observed. The spectrometer has a resolution of 0.01 nm. The minimum magnetic field needed to observe this is (me = 9.1 * 10-31 kg, e = 1.6 * 10-19C, c = 3 * 108 m/s)

Question 29. f(x) is a symmetric periodic function of x i.e. f(x) = f(-x). Then, in general, the Fourier series of
the function f(x) will be of the form

Question 30. In the most general case, which one of the following quantities is NOT a second order tensor?