Physics question and answers for August 10, 2024
- Q light and d olet light are incident at the same angle on the inclined surface of a prism from air me dium and produce angles of refraction r and v...
- Q TON S LAWS Two masses 2 kg and 3 kg are attached to the ends of the string passed over a pulley fixed at the top and accelertion in the...
- Q A battery of unknown emf connected to a potentiometer has balancing length 560 cm If a resistor resistance 1002 is connected in parallel with the cell the balancing length change...
- Q A block of mass m is connected with a spring of spring constant k and placed on a smooth horizontal surface as shown in the figure The block is then...
- Q A passenger in an aeroplane shall 1 Never see a rainbow 2 may see a primary and a secondary rainbow as concentric circles 3 may see a primary and a...
- Q A person can see his inverted image in a concave mirror when he is 1 between focus and center of curvature C 2 beyond C 3 between focus pole 4...
- Q A liquid mixture of volume V has two liquids as its ingredients with densities and B If density of the mixture is a then mass of the first liquid in...
- Q View In English A solenoid has an inductance of 50 mH and a resistance of 0 025 0 If it is connected to a battery how long will it take...
- Q Graph between terminal voltage V V and current flowing through the same cell is shown Current direction from 1 to 2 is taken as positive B Portion AB indicates charging...
- Q A parallel plate capacitor with plates of area 25cm is separated by a distance of 0 05mm The dielectric constant of t he medium between the plates is 8 Th...
- Q A particle moves along x axis with speed 6 m s for the first half distance of a journey and the second half distance with a speed 3 m s...
- Q becomes 4 times hen a tiny circular obstacle is placed in the path of light from distante source What is observed at the centre of the shadow of the obstacle...
- Q 24 A capillary tube is dipped in water and it is 20 cm outside water The water rises upto 8 cm If the entire arrangement is put in freely falling...
- Q Two radioactive substances A and B have decay constants 4 and respectively At t 0 they have the same number of nuclei The ratio of number of nuclei of A...
- Q John is pulling a box forward with a force of 100N and the force forms an angle of 30 elevated from the horizontal The mass of the box is 20kg...
- Q 35 Water is filled in a tank upto 3 m height The base of the tank is at height 1 m above the ground What should be the height of...
- Q An under water swimmer cannot see very clearly even in absolutely clear water because of 1 absorption of light in water 2 scattering of light in water 3 reduction of...
- Q 10 The radius of a planet is twice the radius of earth Both have almost equal average mass densities V and V are escape velocities of the planet and the...
- Q O A thin uniform wire AB of length 1m an unknown resistance X and a resistance of 12 2 are connected by thick conducting strips as shown in figure A...
- Q The magnitude of acceleration of a point on the wheel s rim at f 1 s whose radius is 2 m anc is spinning with angular velocity to that varies...
- Q 17 A uniform rod of mass m and length 1 is kept vertical with the lower end clamped It is slightly pushed to let it fall down under gravity Find...
- Q A double convex lens with both faces of the same radius of curvature is manufactured from a glass of refractive index 1 54 If the radius of curvature is 27...
- Q 7 When a glass capillary tube of radius 0 015 cm is dipped in water the water rises to a height of 15 cm within it Assuming contact angle between...
- Q I have written the standard equation of a straight line for this sum upto y mx 2 c But what to do next 105 In an experiment the resistance of...
- Q A pure semiconductor crystal has 4 x 1027 atoms m It is doped by 4 ppm concentration of pentavalent atom The number of holes per m will be n 10...
- Q If the radius of the earth suddenly contracts to one third of its present value then the duration of the day will be approx Mass of earth remains constant 1...
- Q A prism is made up of flint glass whose 30 dispersive power is 0 053 Find the angle of dispersion if the mean refractive index of flint glass is 1...
- Q 5 The differential equation that describes the behavior of a spring mass apparatus is called the a governing equation b equation of motion c complementary function d steady state solution...
- Q 23 A spherical drop of water has 1 mm radius If the surface tension of water is 75 x 10 N m then difference of pressure between inside and outside...
- Q a A steady current flows in a metallic conductor of non uniform cross section Which of these quantities is constant along the conductor current current density electric field drift speed
- Q 4 Almost independent of h 9 A spring balance reads 200 gF when carrying a lump of lead in air If the lead is now immersed with half of its...
- Q Mechanical Properties of Fluids 199 22 Eight equal drops of water are falling through air with a steady velocity of 10 cm If the drops combine to form a single...
- Q Q No 30 View In English In order that a thin film of oil floating on the surface of water should show colours due to interference the thickness of the...
- Q 2 A constant force acting on a body of mass 3 0 kg changes its speed from 2 0 m s to 3 5 m s in 25 s The...
- Q A force F is applied along a rod of transverse cross sectional area A The tangential stress to a section PQ inclined at an angle 0 to transverse section will...
- Q 5 In a single slit diffraction pattern if the light source is used of less wavelength than previous one then width of the central fringe will be 1 less 2...
- Q A diminished image of an object is to be 34 obtained on a screen 1 0 m away from it This can be achieved by approximately placing 1 a convex...
- Q 9 10 What is the focal length of a convex lens of focal length 30 cm in contact with a concave lens of focal length 20 cm Is the system...
- Q A monkey is sitting on a tree limb The limb exerts two perpendicular forces one of 48 N and another of 20 Find the magnittude of the total force exerted...
- Q A long current carrying straight wire having current I 10 ampere is placed at the centre of an another current carrying loop having current I 10 ampere Straight wire is...
- Q A hollow sphere is moving with linear velocity and angular velocity as shown in figure The time after which pure rolling starts is Question Type Single Correct Type 1 2...
- Q 33 A wave in a string has an amplitude of 2 cm wave travels in the positive direction of x axi a speed of 128 m s and it is...
- Q A fine in its fine rubber rubber band which in unstretched condition forms a circle of radius r is dropped on a soap film formed over a wire frame When...
- Q L A block of mass M is tied to a spring of force constant k and placed on a smooth horizontal surface The natural length of the spring is L...
- Q A point charge of 40 stat coulomb is placed 2 cm in front of an earthed metallic plane plate of large size Then the force of attraction on the point...
- Q A perfectly reflecting solid hemisphere of radius R is placed in the path of a parallel beam of light aperture If the beam carries an intensity I the force exerted...
- Q The ratio of angular speed and linear speed of electron in n orbit of hydrogen atom in accordance with Bohr s model wil be O Directly proportional to n Directly...
- Q A particle at rest explodes into two fragments of masses m and m m m which move apart with non zero velocities If X and 2 are their de Broglie...
- Q No 37 View In English A small square loop of wire of side I is placed inside a large square loop of wire of side 1 The loop are coplanar...
- Q The frequency of ka X ray from an element A of atomic number 20 is The frequency of ka X ray from an element B is 4f Then find the...
- Q The driver of a three wheeler moving with a speed of 36 km h sees a child standing in the middle of the road and brings his vehicle to rest...
- Q A heat conducting piston can move freely inside a closed thermally isolated cylinder which contains an ideal gas In equilibrium the piston divides the cylinder in two equal parts the...
- Q ON S LAWS A pebble of mass 0 05 kg is thrown vertically upwards Give the magnitude and direction of net force on the pebble a during its upward motion...
- Q A series LCR circuit has R 1022 L 0 1 H and C 10 F The circuit is driven by a 100 V rms source with a frequency that can...
- Q two electric bulbs of the same power but with different marked voltages are connected in series across a power line Their brightness will be O 1 directly proportional to their...
- Q 42 A uniform magnetic confined to a cyclindrical region of radius R The magnetic field is increasing at a constant dB tesla second An electron e m dt placed at...
- Q No 26 View In English A man fires a bullet standing between two cliffs First echo is heard after 3 seconds and second echo is heard after 5 seconds If...
- Q A galvanometer has a resistance 5k2 and shows a maximum deflection when a current 20mA flow through it How will you convert this galvanometer into i an ammeter reading up...
- Q A air bubble rises from bottom of a lake to surface If its radius increases by 200 and atmospheric pressure is equal to water coloumn of height H then depth...
- Q the charge density in the beam if the total current is 2 10 A The mobility of electrons in a conductor is defined by the equation vdrift E Find an...
- Q No 35 1 2 3 View In English A 20 kg block is initially at rest A 75 N force is required to set the block in motion After the...
- Q 20 The average translational energy of molecules in a sample oxygen gas at 300 K are 3 15 x 10 21 J The corresponding value at 600 K are nearly...
- Q A rod of length 4m is leaned against a wall as shown It is released from the position when 8 60 Tr end A of rod remains in contact with...
- Q 21 In Boolean algebra A B Y implies that A sum of A and B is Y B Y exists when A exists or B exists or both A and...
- Q A diatomic gas undergoes adiabatic compression and its volume reduces to half of initial volume then its final pressure would be if gas initial pressure P 1 2 4P 2...
- Q A lift is accelerated upward Will the apparent weight of a person inside the lift increase decrease or remain the same relative to its real weight If the lift is...
- Q A large vessel of height H is filled with a liquid of density p upto the brim A small hole of radius A is made at the side vertical face...
- Q The resistance of an average adult human body is 300 2 Find the charge that will flow through a man s body in 5 seconds if he touches a 220V...
- Q cm 3 6 cm 4 8 cm The pressure at the bottom of a water tank is 4 P where P is atmospheric pressure If water is drawn out till...
- Q The difference between the apparent frequency of a source of sound as perceived by an observer during its approach and recession is 2 of the natural frequency of the source...
- Q a circular disc of radius a has been cut out symmetrically from a uniform squar e plate of side 4a Find out the centre of mass of the given plate
- Q 3 A tank is filled with water to a height H A hole is made in one of the walls at a depth D below the water surface The distance...
- Q REVIEW EXERCISES 1 43 Define point defects in solids 1 44 What is Schottky defect 1 45 What is the effect of the presence of Schottky defects on the density...
- Q The angular width of c ntral maxima in Fraunhoffer diffraction with the light of wavelength 6000 and slit width 12 x 10 5 cm is O 2 rad O 3...
- Q In YDSE the distance between slits is 0 28 mm and distance between slits and screen is 1 4 m Distance between central bright fringe and third bright fringe is...
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