Physics question and answers for July 15, 2024
- Q 2 What is the effect on null deflection of galvanometer when the radius of 1 point the wire is tripled a No change Ob Becomes half c Reduces by 1...
- Q Two blocks A and B of mass m and 2m are connected by a massless spring of force con stant k They are placed on a smooth hori zontal plane...
- Q A body moving with uniform retardation covers 1 5 km before its speed reduced to half of its initial value It comes to rest in another 11 m 11 7...
- Q 16 An electric current of 16 A exists in a metal wire of cross section 106 m and length 1 m Assuming one free electron per atom The drift speed...
- Q 9 A projectile is thrown with a velocity of 20 m s at an angle of 600 with the horizontal After how much time the velocity vector will make an...
- Q 1 25 pts As shown in the figure two particles carrying opposite charges 91 0 and 9 0 are a small distance apart from each other separated by the flat...
- Q 8 In the circuit shown in figure K is open The 18 charge on capacitor Cin steady state is q Now key is closed and at steady state the charge...
- Q 7 Two small balls each having equal po charge Q are suspended by two insulating strings at equal length L metre from a hook fixed to a stand The whole...
- Q In the figure below a ball of mass 5 kg starts at point A with a speed of 15 m s on a flat frictionless surface After point B it...
- Q A spectrometer gives the following reading when used to measure the angle of a prism A Main scale reading 58 5 degree Vernier scale reading 09 divisions Given that 1...
- Q In Young s double slit experiment one of the slit is wider than other so that the amplitude of the light from one slit is double of that from other...
- Q 05 Six charges are placed at the corner of a regular hexagon as shown If an electron is placed at its centre O force on it will be Ar 79...
- Q Three identical voltmeters A B and Care connected as shown in a circuit If the readings of voltmeters A and B are 7 5 V and 5 V respectively then...
- Q 5 A circuit has a section ABC as shown in figure If the potentials at point A B and C are V V2 and V3 respectively The potential at point...
- Q A long solenoid of radius R has n turns per unit length It is fed by an alternating current I I cos wt where I is the peak value and...
- Q A power supply of fixed emf E is connected to a variable resistor resistance R and an ammeter of resistance RA The internal resistance of the supply is r The...
- Q The density of a rod gradually changes from one end to the other It is pivoted at one of the end so that it can rotate about a vertical axis...
- Q 45 Susceptibility of Mg at 300 K is 1 2 10 45 The temperature at which susceptibility will be 1 8 10 is 1 450 K 2 200 K 3...
- Q The fundamental frequency of a sonometer wire increases by 5 Hz if its tension is in creased by 21 Instead if the length of wire is decreased by 10 than...
- Q 5 A circular coil of 0 2 m diameter has 100 turns and carries a current of 0 1 ampere The intensity of magnetic field at the centre of the...
- Q Where it is used Explain with diagram working of that device State gauss s theorem Use it to find electric field due infinite line of charg What is the effect...
- Q Why v2 max is root 2g12 For maximum angular displacement 1 2mv 2 2mgl v root 4gl for maximum angular displacement because with this velocity the bob wil not complete...
- Q Read the following carefully A Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperature 80 90 C B Enzymes are highly specific...
- Q The coefficient of static friction between the two blocks is 0 363 What is the minimum acceleration of block 1 so that block 2 does not fall A 6 ms...
- Q simple harmonic oscillation is 13 of its amplitude Ans E E 8 9 E E 1 9 A particle executes simple harmonic motion with time period 15 seconds and having...
- Q A wheel is rolling on a horizontal plane At a certain instant it has velocity v and acceleration a of c m as shown in the figure Acceleration of B...
- Q A network of nine conductors connects six points A B C D E and F as shown below The digits denote resistances in 22 Find the equivalent resistance between A...
- Q angle Two stones A and B are thrown simultaneously from a point on horizontal ground The stone A is thrown vertically up with velocity u and the stone B is...
- Q A lift of mass 1000 kg which is moving with acceleration of 1 m s in upward direction then the tension developed in string which is connected to lift is...
- Q The rate of disintegration of a radioactive sample is P at time ty and R at time to The half life of the sample is proportional to Only one correct...
- Q A uniform magnetic field of magnitude 0 20 T exists in space from east to west With what speed should a particle of mass 0 010 g and having a...
- Q 91 The radius of the nucleus with nucleon 9 number 2 is 1 5 x 10 15m then the radius of nucleus with nucleon number 54 will be A 3...
- Q A car is fitted with a convex side view mirror of focal length 20 cm A second car 2 8 m behind the first car is overtaking the first car...
- Q A compound microscope has an eye piece of focal length 10 cm and an objective of focal length 4 cm Find the magnifica tion if an object is kept at...
- Q ve horizontal Which of the following is incorrect 1 As you move from geographic north pole to south pole the magnetic inclination changes 2 As you move from geographic north...
- Q A horizontal surface is rough A ring is placed on it with its plane parallel to the surface A charge 9 is uniformly Bot 3 2 distributed on this ring...
- Q 4 Coulomb s Law can be expressed as F A r Use the fitting curve of the data to estimate the value of A Express your estimate with the correct...
- Q 27 The nucleus 27 14 13 4Si decays to its mirror nucleus 23 Al by positron emission The maximum kinetic energy energy of the positron is 3 48 MeV Assume...
- Q A If a dielectric is inserted to fill the gap between the plates of a capacitor connected to a battery then electric field inside the capacitor decreases R Magnitude of...
- Q The velocities of A and B are marked in the figure 2 183 The velocity of block C is assume that the pulleys are ideal and string inextensible A 5...
- Q 07 A square of side a is cut from a square of side 2a as shown in the figure Mass of this square with hole is M Then its moment...
- Q 5 A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 00 mm wide and the resulting diffrac tion pattern is observed...
- Q if I have two masses of m1 and m2 in vaccu m and the only force between both the mas ses is of the gravitational force how much t ime...
- Q 3 2 mg 4 cube will not reach the point 2 A square conducting loop of side length L carries 23 a current I The magnetic field at the centre...
- Q A current i is uniformly distributed over the 27 cross section of a long hollow cylindrical wire of inner radius R and outer radius R Magnetic field B varies with...
- Q An object on a spring vibrates in a simple harmonic motion at a frequency of 4 hertz and an amplitude of 8 cm If the mass of the object is...
- Q 5 14 A stick of length lies on horizontal table It has a mass Mand is free to move in any way on the table A ball of mass m...
- Q An electron initially at rest is accelerated through a potential difference of 200 volt so that it acquires a velocity 8 4 x 106 m s The value of e...
- Q 1 A projectile is fired with a speed u at an angle 0 above the horizontal field The coefficient of restitution between the projectile and field is e Find the...
- Q over a a point 0 V m opper nsions lectric Q 14 Two media I and II are separated by a plane surface having speeds of light 2 108 m...
- Q 15 The wedge shown in the figure can slide without friction on a horizontal tabletop The mass of the wedge is M and its angle of elevation is a 30...
- Q Question 1 Answer the following questions very briefly 1 Forces always occur in pairs 2 Mass in motion 3 According to It seems reasonable that acceleration should be inversely proportional...
- Q n this question the y component of vel ocity of rain is in downwards direction o in answer the y component will be wi n negative sign one of these...
- Q Q 13 In a vernier callipers ten smallest divisions of the vernier scale are equal to nine smallest division on the main scale If the smallest division on the main...
- Q Three resistances are in parallel The currents in the first two resistors are 1A and 2 A The voltage across the third resistor is 100 volts The total power dissipated...
- Q 17 A body initially at rest and sliding along a frictio track from a height h as shown in the figure completes a vertical circle of diameter AB D height...
- Q In a compound microscope the magnified virtual image is formed at a distance of 25 cm from the eye piece The focal length of its objective lens is 1 cm...
- Q Find the angular position 0 where the elec tric field due to an electric dipole is perpen dicular to the dipole moment P 0 E A tan 3 C tan...
- Q A thin rod is hinged at one end O and it is in an unstable equilibrium position It falls under gravity due to a slight disturbance It makes angles 60...
- Q 8 A charge Q is uniformly distributed over a large plastic plate The electric field at a point P close to the centre of the plate is 10 V m...
- Q eus ent in triton mbers P v rm into 2He not allowed because of ins a b Fusion processes are impossible at ordinary temperatures and pressures nuclei are positively charged...
- Q Spring pendulum is on the rotating table Initial angular velocity of the table is w and time period of pendulum is To Now the angular velocity of table becomes 2w...
- Q 49 The difference in the coulomb energy between the mirror nuclei Cr and Mn is 6 MeV Assuming th the nuclei have a spherically symmetric charge distribution and that is...
- Q Q 2 Two pendulums each of length 1 are initially situated as shown in figure The first pendulum is released and strikes the second Assume that the collision is completely...
- Q 0 4 2t a b 4 What is the average velocity of a projectile between the instants it crosses half the maximum height if it is projected with a speed...
- Q 2 6 For the arrangement shown in figure the tension in the string to prevent it from sliding down is m 1 kg 1 6 N 19 O ANT 37...
- Q Which of the following is the feature of switch 4 It operates on physical layer It broadcasts data to every computer or Ethernet based device connected to it It is...
- Q A block of mass m is kept over a rough board such that it is connected to a spring whose other end is also fixed to the board The board...
- Q Centre of Mass of a Gas An ideal gas of molar mass M is contained in a very tall cylindrical vessel in the uniform gravitational field in which free fall...
- Q 268 A projectile is thrown with a speed u at an angle 0 to the horizontal The radius of curvature of its trajectory when the velocity vector of the projectile...
- Q A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V If T is the surface tension...
- Q Three particles having masses m 2m 3m respectively are attached by three springs constants k 2 k and 2k respectively as shown find out accelearatiob of each block ju st...
- Q The electric field at the surface of a positively charged spherical conductor with surface charge density of C m and a 1 J radius of 1 m decreases by a...
- Q 60 A short bar magnet placed in a horizontal plane has its axis aligned along the magnetic north south direction Null points are found on the axis of the magnet...
- Q An equiconvex lens is made of material which has a refrac tive index of 1 6 for blue light and 1 5 for red light Its focal length for red...
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