581 In S.H.M. the velocity of a particle is maximum at________________? Physics Medium Full question → A mean position B extreme position C middle between the mean and extreme position on the right side D middle between the mean and extreme position on the left side
582 S.I unit of frequency is_________________? Physics Medium Full question → A Vibration S-2 B Radian C Hertz D ms-1
583 The waveform of S.H.M. is________________? Physics Medium Full question → A Standing wave B Sine wave C Square wave D None
584 A convex lens acts as a diverging lens if the_________________? Physics Medium Full question → A object is beyond C B if the object is with in C C if the object is within f D both B and C
585 Michelson devised the formula to calculate the speed of light_______________? Physics Medium Full question → A C = 4fd B C = 8fd C C = 16fd D C = 5/2fd
586 In optic fiber transmission the repeater are separated through a distance of __________ km in newer system? Physics Medium Full question → A 300km B 200km C 100km D 20km
587 The function of collimeter in spectrometer is________________? Physics Medium Full question → A to produce parallel beams of light B to filter the light rays C to make them D no function
588 Errors in the transmission of power through optic fiber can be minimized by using a______________? Physics Medium Full question → A Multimode index fiber B Graded index fiber C Single mode step index fiber D Copper wire
589 Magnification of the astronomical telescope is_____________? Physics Medium Full question → A fo+fe B fo/fe C fe/fo D (1+fo/fe)L/fo
590 In optic fiber transmission system _____________ are used regenerate the dim light signal? Physics Medium Full question → A Diodes B Repeaters C Laser D Transformer
591 The value of critical angle for glass is_______________? Physics Medium Full question → A 42° B 47° C 52° D 50°
592 A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________? Physics Medium Full question → A center of curvature B focus C optical center D aperture
593 Dioptre power of an concave lens of 10 cm focal length is_______________? Physics Medium Full question → A 10 dioptre B 10 dioptre C 1 / 10 dioptre D 1 / 10 dioptre
594 The minimum distance between an object and its real image in a convex lens is_____________? Physics Medium Full question → A 2 f B 2.5 f C 3f D 4f
595 A convex lens gives a virtual image only when the objects lies_________________? Physics Medium Full question → A between principal focus and center of curvature B beyond 2 f C at the principal focus D between principal focus and optical center
596 Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is__________________? Physics Medium Full question → A 0.5 B 0.2 C 1 D 2
597 Least distance of distinct vision_____________? Physics Medium Full question → A increases with increase in age B decreases with increase in age C neither increases nor decreases D becomes infinite after 60 years
598 Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________? Physics Medium Full question → A zero B focus C 2 f D f/2
599 For normal adjustment, length of astronomical telescope is______________? Physics Medium Full question → A fo + fe B fo – fe C fo / fe D fe / fo
600 Final image produced by a compound microscope is_____________? Physics Medium Full question → A real and inverted B real and erect C virtual and erect D virtual and inverted