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Noun 2022 TMA 3 solutions
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[QUOTE="Guest, post: 3519"] Phy192 Question: A wire that has a resistance of 50 is stretched out so that its length triples Its new resistance is Answer: 15Omega Question: Snells law is the ratio of sine of angle of to the sine of angle of refraction Answer: incidence Question: A coin lies at the bottom of a tank containing water to a depth of 130 cm If the refractive index of water is 13 calculate the apparent depth of the coin Answer: 100 cm Question: A coin lies at the bottom of a tank containing water to a depth of 130 cm If the refractive index of water is 13 calculate the apparent upward displacement of the coin when viewed vertically from above Answer: 30 cm Question: The bending of a ray of light is called Answer: refraction Question: Which of these is not an apparatus to carry out experiment on refraction throuugh glass block Answer: Spring Question: The distance between centre of curvature and pole is Answer: radius of curvature Question: Which of these is most useful as a driving mirror Answer: diverging mirror Question: Diverging mirror produces Answer: virtual diminished and upright images Question: Which mirror is useful for shaving Answer: concave mirror Question: Calculate the length of a wire of cross sectional area 275 x 10 7 m2 and resistivity 110 x 10 6 ohm meter required to make a 2 ohms resistor Answer: 05m Question: Calculate effective resistor of two resistors of resistances 8 and 12 ohms which are connected in parallel Answer: 48Omega Question: What is the unit of electrical resistivity of a wire Answer: Omegam Question: Calculate the focal length of an image formed by a converging lens of image distance 45 cm and magnification 2 Answer: 15 cm Question: What is the separation of white light into its component colours Answer: dispersion Question: The defect of the lens is called Answer: chromatic aberration Question: What is the angle of refraction of light of an equiangular trianguular glass prism at the point of minimum deviation Answer: 30o Question: Which mirror is used as a dentist mirror Answer: Concave mirror Question: Which of these is not a feature of images produced in a plane mirror Answer: real Question: 200g of water at 100o C is poured into 50g of water at 30 o C Assuming that the heat absorbed by the container is negligible calculate the final temperature of the mixture Answer: 86o C Question: The image of an object placed at a position twice the focal length from a concave mirror is Answer: real same size inverted Question: An image formed due to overlapping of several images is said to be Answer: blurred Question: No parallax tells us that the two objects are Answer: coincidence Question: A cell can supply currents of 080 A and 040 A through a 2 ohm and a 5 ohm resistor what is their internal resistance Answer: 1 ohm Question: What is the critical angle of light traveling from water of 133 to air Answer: 48 o Question: Three resistors of resistances 10 Omega 50 Omega and 15 Omega respectively are connected in series to a 12V accumulator Calculate the current flowing through the circuit Answer: 016 A Question: Three resistors of resistances 10 Omega 50 Omega and 15 Omega respectively are connected in parallel to a 12V accumulator Calculate the combined resistance of the circuit Answer: 536 Omega Question: Three resistors of resistances 10 Omega 50 Omega and 15 Omega respectively are connected in parallel to a 12V accumulator Calculate the total current flowing through the circuit Answer: 224A Question: The balanced lenghts of a certain cell of unknown emf and a Daniel cell of emf 108 V are 804 cm and 575 cm respectively on a potentiometer circuit Calculate the unknown emf Answer: 151V Question: A 600 g mass executes a simple harmonic motion with amplitude of 025 cm The period of motion is 067 s Calculate the velocity of the mass when the displacement is 015 cm Answer: 188 cms Question: A body of mass 01 kg is suspended from a spring of force constant 100N 1 The frictional force acting on the body f5v N Set up the differential equation of motion Answer: ddotx50dotx1000x0 Question: A body vibrating with simple harmonic motion has a frequency of 4Hz and an amplitude of 015m Calculate the maximum values of the acceleration and velocity Answer: 947fracms2 377 fracms1 Question: A damped oscillation driven by external periodic impulses whose frequecy is the same as the natural frequency of the oscillator is said to Answer: resonate Question: A set of coordinate axes with respect to which the position and orientation of an object can be measured is called the Answer: frame of reference Question: All bodies at the same place in a gravitational field experience Answer: same acceleration Question: Calculate the average value of the potential energy over one complete cycle of a simple harmonic oscillator with stiffness k200 Nm and amplitude a5 cm Answer: 0125 J Question: Constraints that can be representd as functions of space and time are said to be Answer: holonomic Question: Given that the hamiltonian function for the motion of a one dimensional harmonic oscillator is Hfrac12mp2frack2x2 which of the following is the correct set of hamiltonian equation of motion for the system Answer: fracpmdotx kx dotp Question: Find the position of image formed in question 9 Answer: 24cm in front of mirror Question: The number of images formed by two plane mirrors placed at angle 30 degree is Answer: 11 Question: The number of images formed by two plane mirrors placed at angle 180 degree is Answer: one Question: An object 2 cm long is placed 40 cm in front of a concave mirror of focal length 15cm Find the size of image produced Answer: 12cm Question: The length of the laboratory cannot be measured by Answer: protractor Question: The number of images formed by two plane mirrors placed at angle 90 degree is Answer: three Question: Angle of incidence equals angle of reflection is applicable to mirror Answer: plane Question: What is the distance between centre of curvature and pole of a concave mirror Answer: radius of curvature Question: When a ray of light passes through the prism the sum of the angle of the prism and the angle of deviation is equal to the sum of the angle of incidence and the angle of Answer: emergence Question: A small object is placed on the principal axis of a convex mirror of focal length 10cm Determine the positon of the image when the object is 15 cm from the mirror Answer: 6cm behind the mirror Question: The optical pins must stand during light experiment Answer: upright Question: When the object is at the principal focus of a converging lens the image is Answer: virtual at infinity Question: Density bottle must be held by hand Answer: dry Question: Why is it necessary to open the key as soon as readings are taken during electricity experiment Answer: to avoid draining of the cells Question: When the object distance equals 2f from the converging lens the object size and the image size are Answer: equal Question: The angle of incidece of a wave in the dense medium when the angle of refraction in the less dense medium is 90o is called Answer: critical angle Question: The unit of potential difference is Answer: Volt Question: The ratio of sine of angle of incidence to the sine of refraction is law Answer: Snell Question: Direction of flowing of current can be determined by which of these instruments Answer: galvanometer [/QUOTE]
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