Physics question and answers for September 20, 2024
- Q 14 A child AB is star straight plane mirror fixed to a vertical wall His father CD is standing behind him as shown in the fig The height of the...
- Q 20 An insect fly start from one corner of a cubical room and reaches at diagonally opposite corner The magnitude of displacement of the insect is 40 v3 ft Find...
- Q The driver of a bus travelling with a speed v suddenly observes a wall in front of his bus at a distance a Father of this driver who was also...
- Q A rod lies along the x axis with one end at the origin and the other at x o It carries a uniform charge AC m The electric field at...
- Q Four square pieces of insulation are available to cover an opening area 2A They are of different materials with conductivities K and K as shown and arranged as shown for...
- Q llustration 18 A simple pendulum of length l is made to oscillate with a solid sphere density D in a non viscous fluid of density p find the period of...
- Q Example 14 A toy rocket of mass 0 1 kg has a small fuel of mass 0 02 kg which it burns out in 3 s Starting from rest on...
- Q tration 2 An electron gun G emits electrons of energy 2 keV travelling in the positive x direction The electrons are required to hit the spot S where GS 0...
- Q 84 From a point on the ground a particle is projected with initial velocity u such that its horizontal range is maximum The magnitude of average velocity during its ascent...
- Q A toroid is having 100 turns inner radius 9 cm and outer radius 11 cm then its self inductance is 1 2 H 2 Ho 2 3 Ho 5 4...
- Q questions 1 Discuss the different types of motion with examples 2 Differentiate between scalar and vector quantities 3 How is the weight of an object measured Numerical questions 1 A...
- Q ABCDEF is a regular hexagon with point O as center The value of AB AC AD AE AF Pis 1 2AO 2 4AO 3 6AO 4 0
- Q A particle P is moving in a circle of radius r with uniform speed v C is the centre of the circle and AB is diameter The angular velocity of...
- Q 8 A thick rope of rubber of length 8 m and density 1 5 10 kg m has Young s modulus 3 5x 106 Nm 2 When hung from ceiling...
- Q Spring constant of the spring in the figure shown is 100 N m If system released slowly then elongation in the spring is approximately g 10 m s 49 Fc...
- Q 7 In the circuit shown in figure charge stored in the capacito of capacitance 5 F is HHHHHH 2 F 2 F 2 F 5 F 3 F 4 F...
- Q A narrow smooth tunnel of L shapes is made into earth upto central as shown in the figure A small ball which just fits in tunnel is released from A...
- Q 128 Potential difference between A and B in the figure shown is 6 V 12 1 2 V 3 8 V 292 ww A www ww 3 9 X 109...
- Q A body of mass 1 kg is moving in a vertica circular path of radius 1 m The differenc between the kinetic energies at its highest an lowest position is...
- Q The focal length of spherical mirror if the object distance u 50 1 0 5 cm and image distance V 20 1 0 2 cm will be 1 12 2...
- Q PASSAGE I Two cars A and B travel in a straight line The distance of A from the starting point is given as a function of time by xA t...
- Q Example 3 70 An open lift is moving upwards with velocity 10 ms It has an upward acceleration of 2 ms 2 A ball is relative to ground projected upwards...
- Q B 1 An advertisement claims that a certain 1200kg car can accelerate from rest to a speed of 25 m s in a time of 8s What average power must...
- Q 29 In the LR circuit shown what is the variation of the current I as a function of time The switch is closed at time t 0 sec 2V A...
- Q Four metallic plates each with a surface area of one side A are placed at a distance d form each other The alternating plates are connected to points A and...
- Q 40 3 2 kg of ice at 10 C just melts with m mass of steam at 100 C then m is equal to cal g CA Sice 0 5...
- Q A compass needle whose magnetic moment is 60 Am is pointing geographical north at a certain place whereas the horizontal component of the Earth s magnetic field is 40 Wb...
- Q relative density of wooden piece 1516 3 A piece of wood of uniform cross section and 15 cm height sinks 10 cm in water and 12 cm in spirit Find...
- Q BEGINNER S BOX 9 If two forces act in opposite direction then their resultant is 10N and if they act mutually perpendicu their resultant is 50N Find the magnitudes of...
- Q Area of cross section of plane circular coil makes twice keeping it number of turns same then percantage increases in its self inductance 1 41 4 3 200 2 141...
- Q Categorise the following function of time cos ot as a S H M b Periodic but not S H M Also find the period Hint cos wf 3 cos wt...
- Q Consider a uniform electric field 3 x 10 i NC 1 Calculate the flux of this field through a square surface of area 10 cm when 2 i its plane...
- Q 4 8 sec The equation of S H M is y sin 2 nt a then its phase at time t is 1 2nt 2 4 nt 3 2 nt...
- Q Q5 Two plane mirrors are placed parallel to each other at a separation of 6m as shown in figure Find the Xit number of images of the object O separation...
- Q a c 1 04 d 0 98 2010 33 The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface having work function 5...
- Q D For the structure shown in figure moment of about an axis passing through yy is 1 2ML 3 2 45 45 2L 2 ML 3 4ML
- Q In Young s double slit experiment the slits are 0 5 mm apart and interference pattern is observed on a screen placed at a distance of 1 0 m from...
- Q Graph is plotted between photo current 1 and applied voltage V Then maximum kinetic energy of emitted electron will be 1 2 eV 4 3 2 1 0 1 V...
- Q Two particles P and Q are projected simultaneously away from each other from a point A as shown in figure The velocity of P relative to Qin ms at the...
- Q I mass m and side r 26 ABC is an equilateral triangular frame It is at rest under the action of horizontal magnetic field B as shown and the gravitational...
- Q ma 13 On an object of mass 1 kg moving along x axis with constant speed 8 m s a constant force 2 N is applied in positive y direction...
- Q A lens of focal length f is cut along the diameter into two identical halves In this process a layer of the lens t in thickness is lost then the...
- Q A particle of mass m is executing oscillation about the origin on the x axis Its potential energy is U x K x 3 where k is a positive constant...
- Q When the N pole of a bar magnet points towards the south and S pole towards the north the null points are on the 1 magnetic axis 2 magnetic centre...
- Q If displacement of a particle is zero the distances covered 1 must be zero 2 may or may not be zero 3 cannot be zero 4 depends upon the particle
- Q Two persons P and Q crosses the river starting from point A on one side to exactly opposite point B on the other bank of the river The person P...
- Q 1 Figure shows the electric lines of force emerging from a charged body If the electric field at A and B are E A and EB respectively and if the...
- Q 4 similar rods which are thermally insulated are joined at point A If heat flows in from point B at rate of 1W and from point C at 3W inside...
- Q 1 PHYSICS In closed end pipe of length 105 cm standing waves are set up corresponding to the third overtone What distance from the closed end amongst the following is...
- Q friction between the striker and board is 0 2 The coordinate of the striker when it stops taking point O to be the origin is 1 1 2 2 2...
- Q C 74 In Young s double slit experiment angular width of fringes is 0 20 for sodium light of wavelength 5890 If complete system is dipped in water then angular...
- Q 10 A body is dropped from the top of a tower at height 100 m Simultaneously another body is thrown up with a velocity 40 m s When and where...
- Q Figure 3 24 gives the x t plot of a particle in one dimensional motion Three different equal intervals of time are shown In which interval is the average speed...
- Q Quiz Quiz If earth were to stop spinning then your weight on equator will be A B C D heavier by around 0 5 heavier by around 5 less by...
- Q Two mirrors are inclined at an angle 0 as shown in the figure Light ray is incident pal mirrors Light will start retracing its path after third reflection if A...
- Q If F sin0 2cose of Fis 1 coco A 1 then the minimum positive value 2 4 3 4 2 3 60
- Q Two parallel slits 0 6 mm apart are illuminated by light source of wavelength 6000 The distance between two consecutive dark fringes on a screen 1 m away from the...
- Q A particle moves along a circular arc of radius R making an angle of 0 at centre The magnitude of displacemen a 2R sin 0 2 b 2R sin 0...
- Q A particle has initial velocity V i j and a constant force F i j acts on the particle The path of the particle is 1 straight line 3 circular...
- Q 23 A rod PQ of mass M and length L is hinged at end P The rod is kept horizontal by a massless string tied to point Q as shown...
- Q NEET PHY Q 21 A hollow sphere is released from the top of a wedge as shown in the figure There is no friction between the wedge the ground There...
- Q In the given arrangement the charge on the 3 F capacitor is 2 F HE T 10V 3 F the fur HH 1 F
- Q The internal resistance of a cell of e m f 2 V is 0 1 Q2 It is connected to a resistance of 3 9 2 The voltage across the...
- Q Two small balls having the same mass and charge and located on the same vertical at heights h and h are thrown in the same direction along the horizontal at...
- Q 4 A is false But Ris 39 When a bar magnet is suspended freely in a uniform magnetic field identify the correct statements a The magnet experiences only couple and...
- Q A55 kg man holds a weight of 20 kg on his head W is the work done by him against gravity if he moves distance of 20 m i on...
- Q 17 In the arrangement shown the magnitude of each resistance is 12 The equivalent resistance between O and A is given by a 75 a b 17 02 c B...
- Q A physical quantity of the dimensions of length that can be e formed out of c G and is c is velocity of light G 4 0 is universal constant...
- Q 45 A person travels the total distance in two parts in the ratio 2 1 with a constant speed of 30 km h in the first part and 40 km...
- Q In Young s double slit experiment two slits are illuminated with separation between them as b The screen is at a distance d b from slits At a point P...
- Q A loaded spring gun of mass M fires a bullet of mass m with a velocity v at an angle of elevation 0 The is initially at rest on a...
- Q Two point charges of 0 2 C and 0 2 C are separated by 108 m Determine the electric field a an axial point at a distance of 0 1...
- Q In R L C series AC circuit the potential differences across each element is 20 V Now the value of the resistance alone is doubled then potential differences across R...
- Q In a Young s double slit experiment the fringe width will remain same if D distance between screen and plane of slits d separation between two slits and wavelength of...
- Q 40 electric bulbs are connected in series across a 220 V supply After one bulb is fused the remaining 39 are connected again in series across the same supply The...
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