16. A signal containing multiple frequencies is shown in figure A. It is passed through 2 different filters and then outputs are shown in figure B & C. M (A) S (B) sha (C) (a) B corresponds to low pass filter and C to high pass filter. (b) B corresponds to high pass filter and C to low pass filter. (c) Both correspond to low pass filter (d) Both correspond to high pass filter. 17. The sketch shown below illustrates the apparatus and results for a famous experiment. The graph on the right is a polar plot of the number of electrons received in the detector. From the result, the experimenters were able to conclude that:- electron Gun 0 Ni I(a) Detector Target Nickele T crystal 30 a (a) The energy levels of atoms in a metal are quantized. (b) Electrons in a beam can behave as wave. (c) Electrons have spin half. (d) There are magnetic domains inside a nickel sample. 50 70 a 190 18. Mass of Bromine, Selenium and Krypton are given as:- M* =79.918528 u, M| Kr ) = 79.916376 u, 80. MSe) 79.916521u Which of the following decays are possible? (i) Br Kr+e+v (ii) Br Se+e+v (iii) Bre+se+v (a) all 3 (b) (i) & (iii) only (c) (ii) & (iii) only (d) (i) & (ii) only 19. Drawing power form a 12V car battery, a 9V stabilized DC voltage is required to power a car stereo system, attached to the terminals A and B, as shown in the figure. If a Zener diode with ratings, V = 9V and Pmax = 0.27 W, is connected as shown in the figure, for the above purpose, the minimum series resistance Rs must be:- (a) 1112 R A 12V V = 9V R OB (b) 103 (c) 100 (d) 972 20. When light of wavelength 540 nm passes through a single slit of unknown width, the diffraction pattern displays a second maximum where the first minimum of light of an unknown wavelength had been observed to fall. What is the unknown wavelength? 540nm. Unknown a (a) 360 nm (b) 270 nm (c) 180 nm (d) 810 nm