Physics question and answers for October 28, 2023
- Q A beam of electrons is used in young s double experiment If the speed of electrons is increase then the fringe width will 1 decrease 2 increase 3 fringe will...
- Q represent two snaps of a travelling wave on a string of mass per m 0 25 kg m The two snaps are taken at time t 0 and t 1...
- Q 1 5 Calculate the wavelength and frequency of He line of Balmer series for hydrogen atom What is the least amount of energy eV that should be given to H...
- Q 74 Wave Optics White light is used in Young s double slit experiment Separation between slits is y and the screen is at distance x from slits x y Which...
- Q Diffraction of sound wave is more prominent in daily life compared to that of light wave because 1 Light has larger wavelength 2 Sound has larger wavelength 3 Both have...
- Q 39 Magnifications of image of an object at two different positions of a convex lens is 4 and 2 If displacement between positions is 20 cm focal length of lens...
- Q wo coherent point sources of light wave S and S produce light of same frequency uHz and wavelength A cm with amplitude A m Each circular arc represents a wavefront...
- Q Two coherent point sources of light wave S1 and S2 produce light of same frequency Hz and wavelength cm with amplitude A m Each circular arc represents a wavefront at...
- Q UUDIS In a YDSE Young s double slit experiment screen is placed Im from the slits wavelength of light used is 6000 Fringes formed on the screen are observed by...
- Q An object S is placed at a distance of 20 cm from a convex lens of focal length 15 cm as shown in the figure where should a convex mirror...
- Q Light from a source consists of two wavelength A 6500 and 5200 If D 2m and d 6 5mm find the minimum value of y 0 where the maxima of...
- Q Where should an object be placed in front of a convex lens to get a real image of the size of the object a At the principal focus of the...
- Q Two loudspeakers L and L2 driven by a common oscillator and amplifier are arranged as shown in fig The frequency of the oscillator is gradually increased from zero and the...
- Q In young s double slit experiment the slits are placed 0 240nm apart Light of wavelength 500nm is incident on the slits The total number of bright fringes that are...
- Q A convex lens has focal length 20cm at what distance from the lens should the object be placed so that the image for med is 40 cm on the other...
- Q separte by a distance of 1 mm are illuminated with red light of wavelength 6 5 10 m The interference fringe are observed on a screen placed Im from the...
- Q There is a mark at the base of an empty beaker The mark is focussed with the help of a microscope from above If tur pentine oil of 4 cm...
- Q The 2 A tank is filled with water to a height of 12 4 cm appar ent depth of needle lying at the bottom of the tank is mea sured...
- Q 4 The height of a vessel is 15 cm Liquid is poured into the vessel such that the surface of the liquid remains 5 cm below the vessel s top...
- Q 3 A rectangular block of thickness 10 cm and refractive index 1 5 is placed on a small coin A beaker is placed on the block and water of height...
- Q An object is placed at a distance of 21 cm from a concave mirror of radius of curvature 10 cm Now a glass slab of thickness 3 cm and refractive...
- Q A convex lens of focal length 40 cm is placed in system of coordinate axis such that its optical centre is at origin and principal axis coinciding with x axis...
- Q 7 Refractive index of a glass prism ABC 1 5 It is immersed in water is w 3 as shown in the Fig 2 90 Show that a ray incident...
- Q The graph drawn between velocity and frequency of EM wave in vacuum will be hr min Straight line parallel to frequency axis Straight line parallel to velocity axis Straight line...
- Q 35 Two identical glass u 3 2 equiconvex lenses of focal length f are kept in contact The space between the two lenses is filled with water u 4 3...
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