Physics question and answers for November 14, 2023
- Q A 1.00mH inductor and one 1.00?F capacitor are connected in series. The current in the circuit is described by I = 20t where t is in seconds and I is...
- Q 011/12-13O11 12 13In the above circuit if R? R? R3, and the currents passing through the corresponding resistances are 1?, 12, and 13. then,11 12 13VO111213R??
- Q A 100? resistor, 2.00 mH inductor, and 50 F capacitor are connected in series to an AC voltage source. If the maximum voltage is 75.0 V and the frequency is...
- Q 38. Magnets are involved in the production of electricity for many powergenerators.TrueFalse
- Q A power station is located 120km from a town that requires 60MW of power. The transmission lines have a resistance of 0.100/km.Determine the output voltage of the transformer at the...
- Q Find the charge on the capacitor in an LRC-series circuit at t = 0.04 s when L = 0.05 h, R = 3, C = 0.008 f, E(t) = 0...
- Q A 65 ? resistor, an 7.8 ?F capacitor, and a 39 mH inductor are connected in series in an ac circuit.Calculate the impedance for a source frequency of 30.0 kHz.
- Q An electric motor is being powered with a voltage amplitude of 350 V at 60 Hz. The motor draws a current amplitude of 13.0 A.Find the root-mean-square voltage.
- Q Consider the power dissipated in a series R-L-C circuit with R=3600, L = 120mH, C=0.800?F, V = 50V, and w=11300rad/s. The current and the voltages in this circuit are not...
- Q When a resistance R is connected in series with an (non-resistive) element A, the electric current is found to lead the voltage by angle of 30. When the same resistance...
- Q An alternating current generator has an internal resistance Rg and an internal inductive reactance of magnitude Xg. It is used to supply power to a passive load consisting of a...
- Q If current amplitude is 5A and angular frequency of source is 100 rad/sec and resistance is 100 , inductance is 4 H and capacitance is 20 uF. The peak value...
- Q Quality factor of a series LCR circuit is 0.6. If definition of quality factor is changed such that now limiting frequency of bandwidth is taken upto 1/3rd of maximum power...
- Q An alternating source of 200 V (RMS) is applied in series LCR circuit. At resonance potential difference across inductor and capacitor is 300 volts. Then potential difference across (RMS value)resistance...
- Q A voltage source V = 200?2 sin (wt+0) connected in series LCR circuit having resistance, inductance and capacitance as 100 2, 1H and 9 uf respectively. Then max power consumed...
- Q Choose the incorrect statement regarding transformers:In step-up transformers, the primary coil is made from thick wire so that it can sustain high current.Transformers do not work on DC voltageIn transformers,...
- Q A DC motor operates with 220 V mains. Initially it draws a current of 20 A. The resistance of starter is 6?. When the motor runs at its full speed...
- Q A step-up down transformer operated on a 2.5 kV line. It supplies a load with 20 A. the ratio of primary winding to the secondary winding is 10:1. If the...
- Q A star-connected, 3-phase, 4-pole, 50 Hz alternator has a single layer winding in 24 stator slots.There are 50 turns in each coil and the flux per pole is 0.05 Wb....
- Q Two plane mirrors M and M are placed with their reflecting surfaces making an angle a B A point objec O is placed in between the region of two mirror...
- Q 1 A compound microscope uses an objective lens of focal length 4cm and eyepiece lens 10cm A object is placed at 6cm from the objective lens Calculate the magnifying power...
- Q 4 A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes In order to increase the maximum distance of distinct vision...
- Q A particle of mass m in the one dimensional energy well 0 x L co elsewhere V x is in a state whose coordinate wave function is given by x...
- Q For the angle of minimum deviation of a prism to be equal to its refracting angle the prism must be made of a material whose refractive index fait for 1...
- Q An object is moving along the principal axis of a convex lens of focal length 20 cm with a constant velocity of 2ms 1 When then the object is at...
- Q If the critical angle for total internal reflection from a medium to vacuum is 30 The velocity of light in the medium is O 3 108 m s O 1...
- Q A point source of light is kept at a depth h in water having refractive index 4 3 The radius of circle at the surface of water through which light...
- Q 46 An object is placed at a distance x from a convex lens The power of the lens required to have an image real n times magnified is 1 n...
- Q When a small lamp is held 1 5m above the surface of water in a tank its image formed by reflection at the surface appears to coincide with the image...
- Q A convex lens of focal length 40 cm is in contact with concave lens of focal length 25 cm The power of combination is O 1 5 D O 6...
- Q One surface of prism with prism angle 30 and refractive index of material 2 is silvered At what angle a ray of light incident on the prism so that after...
- Q The focal length of the objective of an astronomical telescope is 1 0 m If the magnifying power of telescope is 20 then the length of telescope for relaxed eye...
- Q Does a spherical lenses have 2 p oles Like in a mirror we say the p oint where the principal axis touc hes the reflecting surface as pole so in...
- Q ABC is a right angled prism of transparent material of refractive index such that ZB is smaller than ZA as shown in figure A ray of light incident mormally on...
- Q In YDSE when a glass plate of refractive index 1 5 of thickness tis introduced in path of one interfering beam wavelength X the intensity at position where the central...
- Q B The height of mai intage this An object is placed at a certain distance from a screen A convex lens of focal length 40 cm is placed between the...
- Q A glass slab of dimensions 6 x 4 cm is placed such a way that length and breadth are parallel to x axis and y axis respectively as shown in...
- Q 48 For the given incident ray as shown in figure the condition of total internal reflection of this ray the required refractive index of prism will be 1 3 1...
- Q m is al of between these two colours when they emerge ou 1 659 respectively then the angular separation of the prism is 1 0 9 3 1 8 The...
- Q statement s A ray is incident from the other medium to this medium 0 1 2 are positive H y y Ho x z plane A Ray will definitely return...
- Q 94 Identify the device used as spherical mirror or le Previo in the following cases when the image formed virtual and erect in each case A Object is placed between...
- Q The angle of deviation 8 vs angle of incidence i is plotted for a prism Pick up the incorrect statements 8 65 60 60 O The angle of prism is...
- Q A ray of light strikes a 90 triangular glass prism at an angle of incidence 0i Determine the refractive index n of the prism as a function of ei if...
- Q Angle of prism is A and its one surface is silvered Light rays falling at an angle of incidence 2A on first surface return back through the same path after...
- Q A thin lens has focal length fand its aperture has diameter d It forms an image of intensity Now the central part of the aperture upto diameter d 2 is...
- Q A point source of light is kept at a depth hin water having refractive index 4 3 The radius of circle at the surface of water through which light emitted...
- Q A convex lens makes a real image 4 cm long on a screen When the lens is shifted to a new position without disturbing the object we again get a...
- Q O 1 5 D A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm The power of combination is 6...
- Q A concave mirror of focal length f in air is immersed in water 4 3 The focal length of mirror in water will be Of 4 f 3 3 f...
- Q A paperweight is made of a solid glass hemisphere of index of refraction 1 53 The radius of the circular cross section is 4 0 cm The hemisphere is placed...
- Q BE 3 6 cm 4 12 cm A convex lens forms a real image of a point object at a distance of 50 cm from the convex lens A concave...
- Q White light is incident normally on a glass slab Inside the glass slab KCET 2012 a Red light travels faster than other colours b Violet light travels faster than other...
- Q along the convex side Then the distance in cm of the image is 1 20 2 30 4 12 3 40 Two thin similar convex glass pieces are joined together...
- Q er ne S S o 4 sin Refraction at Spherical Surfaces A point object is situated at a distance of 36 cm from the centre of the sphere of radius...
- Q A coin is placed at the bottom of a tank which is filled by two liquid layers as shown The apparent depth of coin from top of surface for normal...
- Q If the focal length of the lens is 20 cm what is the distance of the image from the lens in the following figure 1 5 5 cm 3 12...
- Q An object O is placed at a distance x from the focus of a convex lons and its imago I is formed at a distance x from the other focus...
- Q 11 Problem 6 Fiber optics are an important part of our modern internet In these fibers two different glasses are used to confine the light by total internal reflection at...
- Q 3 A converging beam of rays is incident on a diverging lens Having passed through the lens the rays intersect at a point 15 cm from the lens on the...
- Q 25 A vessel of depth d filled with a liquid o refractive index u up to half its depth and the remaining space is filled with a liquid of refractiv...
- Q Sunbeam makes an angle 0 40 with the surface of the Earth At what angle to the horizontal shou place a flat mirror so that a ray of sunlight after...
- Q 3 D 3 1 A ball is projected from top of the table with initial speed u at an angle of inclination 0 motion of image of ball w r...
- Q Digital movie projectors work on the principle of 1 Reflection from micromirrors 2 Refraction from thin lenses 3 Dispersion from thin prisms ibre
- Q Illustration 11 The bottom of a containers made of glass 4 cm thick u 1 5 The container contains two immiscible liquids A and B upto depths of 6 cm...
- Q 3 2 4 Infinite A person 1 6 m tall is standing at the centre between two walls three metre high What is the minimum size of a plane mirror...
- Q 4 8 mm Light enters at an angle of incidence in a transparent rod of refractive index For what value of the refractive index of the material of the rod...
- Q 1x A ray of light travels from an optically denser to a rarer medium The critical angle for the media is C The maximum possible deviation of the ray will...
- Q A light ray is moving from denser refractive index to air If the angle of incidence is half the angle of refraction find out the angle of refraction
- Q How much water should be filled in a container of height 21cm so that appears half filled to the observer when viewed from the top of the container 4 3...
- Q the vertical displacement h of the incident ray from the principal axis as shown in figure a The tical displacement of light rays parallel to the axis of a lens...
- Q 7 Which of the following ray diagram is correct for the ray of light incident on a lens shown in FX C d Fig D Fig C a Fig A...
- Q A transparent sphere of radius R 2 0 m has mirrored surface on its right half as shown in figure 1 d 2 0 2 1 9 A light ray...
- Q Signals in form of light pulses are fed at one end of an optical fibre of circular cross section of radius r All the rays from the source lie within...
- Q The refractive index of a liquid depends on the y coordinate as n no y 1 If a ray of light is incident from air n 1 at origin at...
- Q 7 Fixed Mirror A plane mirror of semicircular shape radius 1m is placed in y z plane with its diamete a distance of 10 m from plane mirror there is...
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