Objective Questions

Questions (947)

#	Question	Topic	Actions
801	Two out-of-phase sound waves with the same amplitude and frequency arrive at th…	PHY 104 Past Questions	View
802	According to atomic theory, electrons are usually found:	PHY 104 Past Questions	View
803	The 2nd overtone of a standing wave on a string of length 5 cm is 100 Hz. If th…	PHY 104 Past Questions	View
804	The half-life of a radioactive substance is 10 minutes. A sample of the radioac…	PHY 104 Past Questions	View
805	A transverse wave consists of	PHY 104 Past Questions	View
806	A small boat in a harbour is protected from waves on the sea by harbour walls. …	PHY 104 Past Questions	View
807	A convex lens of focal length 40 cm is in contact with a concave lens of focal …	PHY 104 Past Questions	View
808	The diagram shows white light passing through a prism. Which of the following g…	PHY 104 Past Questions	View
809	A scientist needs to use a source of gamma rays as safely as possible. Which ac…	PHY 104 Past Questions	View
810	The critical angle for a beam of light passing from water into air is 48.8°. Th…	PHY 104 Past Questions	View
811	Calculate the minimum wavelength of an X-ray tube operating at 30 kV.	PHY 104 Past Questions	View
812	The table shows the results of an experiment to find the half-life of a radioac…	PHY 104 Past Questions	View
813	The missing product from this reaction ¹²¹₅₃I → ¹²¹₅₂Pb + ______ is	PHY 104 Past Questions	View
814	A sinusoidal wave travelling in the positive direction has an amplitude of 15 c…	PHY 104 Past Questions	View
815	A double-convex lens is used to project a slide. The slide is 2 inches high and…	PHY 104 Past Questions	View
816	Ultrasonic waves produced by a vibrating quartz crystal are	PHY 104 Past Questions	View
817	The major success of the Bohr theory was in explaining	PHY 104 Past Questions	View
818	Which of the following give the correct definition of critical angle?	PHY 104 Past Questions	View
819	Radio waves are received at a house at the bottom of a hill. The waves reach th…	PHY 104 Past Questions	View
820	Light of constant intensity strikes a metal surface. The frequency of the light…	PHY 104 Past Questions	View
821	The equation for displacement of two identical particles performing S.H.M. is g…	PHY 104 Past Questions	View
822	The maximum velocity and maximum acceleration of a particle executing S.H.M. ar…	PHY 104 Past Questions	View
823	A beam of ultraviolet light has a wavelength 150 nm. How much energy does a pho…	PHY 104 Past Questions	View
824	A radioactive element has a count rate of 600 Hz. If the half life of this elem…	PHY 104 Past Questions	View
825	The threshold frequency in a photoelectric experiment is most closely related t…	PHY 104 Past Questions	View
826	If the kinetic energy of a particle executing S.H.M. is given by K = K₀ cos²(αt…	PHY 104 Past Questions	View
827	One beam of coherent light travels path P₁ in arriving at point Q and another c…	PHY 104 Past Questions	View
828	Light of wavelength 5.0 × 10⁻⁷ m was used to illuminate a diffraction grating. …	PHY 104 Past Questions	View
829	The nuclide notation for a generic element is given as ᴬ_Z X. Which of the foll…	PHY 104 Past Questions	View
830	The radioactive isotope iodine-131 has a half-life of approximately 8 days. A h…	PHY 104 Past Questions	View
831	The graph between the velocity (v) of a particle executing S.H.M. and its displ…	PHY 104 Past Questions	View
832	A bat emits ultrasonic sound of frequency 100 kHz in air. If this sound meets a…	PHY 104 Past Questions	View
833	The amplitude for a S.H.M. given by the equation x = 3 mm + 4 cos(3πt) is	PHY 104 Past Questions	View
834	Which of the following statements is true about a photon?	PHY 104 Past Questions	View
835	Cameras X and Y have f-numbers f/1.6 and f/16 respectively. If the focal length…	PHY 104 Past Questions	View
836	For the travelling harmonic wave y(x, t) = 2 cos 2δ (10t - 0.008x + 0.35) where…	PHY 104 Past Questions	View
837	The strong force is the force of	PHY 104 Past Questions	View
838	Light enters a glass block at an angle of incidence of 46°. The light refracts …	PHY 104 Past Questions	View
839	In Young's interference experiment, if the separation between the slits is halv…	PHY 104 Past Questions	View
840	The work function of a particular metal is 2.00 eV. If the metal is illuminated…	PHY 104 Past Questions	View
841	An object is placed 8.0 cm from a thin converging lens of focal length 5.0 cm. …	PHY 104 Past Questions	View
842	A glass cube is held in contact with a liquid and a light ray is directed at th…	PHY 104 Past Questions	View
843	Calculate the speed of the electron as it hits the target in an X-ray tube oper…	PHY 104 Past Questions	View
844	Which of the following is used as magnifying mirror?	PHY 104 Past Questions	View
845	The threshold frequency for a photoemissive surface is 4.0 × 10^14 Hz. What is …	PHY 104 Past Questions	View
846	The objective and the eyepiece of a microscope have focal lengths of 4.0 mm and…	PHY 104 Past Questions	View
847	The work function of platinum is twice that of the work function of calcium. If…	PHY 104 Past Questions	View
848	What is required for a nuclear transmutation to occur?	PHY 104 Past Questions	View
849	Light waves pass from air into glass and are refracted. What always remains con…	PHY 104 Past Questions	View
850	The variation with frequency f of the amplitude A of the forced oscillations of…	PHY 104 Past Questions	View
851	The displacement for a particle performing S.H.M. is given by x = A cos(αt + φ)…	PHY 104 Past Questions	View
852	The charge on electron is -e. Which of the following correctly describes the ch…	PHY 104 Past Questions	View
853	A string is clamped at two ends and set into vibration such that the standing w…	PHY 104 Past Questions	View
854	A beam of light of wavelength 650 nm is used to obtain interference fringes. Th…	PHY 104 Past Questions	View
855	In an experiment to obtain interference patterns on a screen, light of waveleng…	PHY 104 Past Questions	View
856	What is the cut off frequency of the radiation that could eject photoelectrons …	PHY 104 Past Questions	View
857	If an object is outside the center of curvature of a concave mirror, its image …	PHY 104 Past Questions	View
858	At what temperature will the speed of sound in air be 3 times its value at 0°C?	PHY 104 Past Questions	View
859	Find the wavenumber of the photon released in an electronic jump from the fourt…	PHY 104 Past Questions	View
860	An SHM has an amplitude 'a' and a time period T. The maximum velocity will be:	PHY 104 Past Questions	View
861	Which statement describes monochromatic light?	PHY 104 Past Questions	View
862	Light travels at a speed of 2.0 × 10⁻⁸ m/s in a glass block. In the glass, the …	PHY 104 Past Questions	View
863	A concave mirror has radius of curvature 12 cm. At what distance from the mirro…	PHY 104 Past Questions	View
864	Monochromatic light from a laser passes through two slits separated by 0.005 mm…	PHY 104 Past Questions	View
865	The motion of a particle varies with time according to the relation y = b sin α…	PHY 104 Past Questions	View
866	A man who wears glasses of power 2.5 diopters must hold a newspaper at least 25…	PHY 104 Past Questions	View
867	Find the mass defect of ⁶³₂₉Cu if the actual mass of copper is 62.91367u.	PHY 104 Past Questions	View
868	There are three main types of radiation which may be emitted during radioactive…	PHY 104 Past Questions	View
869	A student has three radioactive sources X, Y and Z. He devised the following ex…	PHY 104 Past Questions	View
870	A plane mirror is fitted to a wall. Which statement about the image formed by t…	PHY 104 Past Questions	View
871	The work function of nickel metal is 5.0 eV. If light frequency of 3.5 × 10^15 …	PHY 104 Past Questions	View
872	The speed of sound in water and air is 1450 m/s and 330 m/s respectively. Sound…	PHY 104 Past Questions	View
873	What happens to the mass number and the atomic number of an element when it emi…	PHY 104 Past Questions	View
874	What is the de Broglie wavelength of a 10 g bullet moving at 400 m/s?	PHY 104 Past Questions	View
875	Which of the following is not a property of beta particles? (I) They have highe…	PHY 104 Past Questions	View
876	A lens of 15 cm focal length forms an image four times the size of an object. T…	PHY 104 Past Questions	View
877	Sound waves in air cannot be polarized because	PHY 104 Past Questions	View
878	Find the maximum kinetic energy of electrons ejected from a certain material, i…	PHY 104 Past Questions	View
879	Compton used photons of wavelength 0.0711 nm. What is the energy of the photons…	PHY 104 Past Questions	View
880	This reaction ⁴¹₂₀Ca → ⁴¹₁₉K + ______ is an example of	PHY 104 Past Questions	View
881	A radioactive substance emits a particle from the nucleus of one of its atoms. …	PHY 104 Past Questions	View
882	The stable isotope of sodium is ²³Na. What kind of radioactivity would you expe…	PHY 104 Past Questions	View
883	A simple microscope forms an image twice the size of the object. If the focal l…	PHY 104 Past Questions	View
884	A camera with a 80-mm focal length lens is used to photograph a tree 12 m tall.…	PHY 104 Past Questions	View
885	Which force is responsible for producing a stable nucleus by opposing the elect…	PHY 104 Past Questions	View
886	A car with a siren of frequency 280 Hz is moving towards a stationary observer …	PHY 104 Past Questions	View
887	The wavelength of Compton scattered photons is measured at θ = 90°. If Δλ/λ is …	PHY 104 Past Questions	View
888	The diagram shows the dispersion of white light by a glass prism. Why does disp…	PHY 104 Past Questions	View
889	Two narrow slits separated by 1.5 mm are illuminated by monochromatic light of …	PHY 104 Past Questions	View
890	Which statement about a converging lens is not correct?	PHY 104 Past Questions	View
891	Photons with a frequency of 1.0 × 10²⁰ Hz strike a metal surface. If electrons …	PHY 104 Past Questions	View
892	In a cathode-ray tube, a hot tungsten cathode releases particles by thermionic …	PHY 104 Past Questions	View
893	The wave-particle duality theory is the first to give an adequate explanation o…	PHY 104 Past Questions	View
894	Which of the responses contains all the statements that are consistent with the…	PHY 104 Past Questions	View
895	In Young's double slit experiment, the distance between the slits is gradually …	PHY 104 Past Questions	View
896	The photon model of light is more appropriate than the wave model in explaining	PHY 104 Past Questions	View
897	Two sound waves of equal amplitude with slightly different frequencies will res…	PHY 104 Past Questions	View
898	Which statement is not a method to minimize the risk caused by working with rad…	PHY 104 Past Questions	View
899	Which of the following examples represent simple harmonic motion?	PHY 104 Past Questions	View
900	If a particle in SHM has a period of 0.2 s and an amplitude of 9 cm. What is th…	PHY 104 Past Questions	View

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