Physics question and answers for July 20, 2024
- Q A block of mass 10 kg is placed on a rough inclined plane of nclination 370 tan 37 3 4 The coefficient of friction between block and surface is 0...
- Q A man standing midway between two cliffs claps his hand and starts hearing a series of echoes of interval of 1 s The speed of sound in air is 340...
- Q Q2 If the voltage across a bulb decreases by 1 then the percentage change in its power output is 1 1 2 4 3 2 4 5 2 1 3...
- Q A bird is flying towards north with a velcoity 40 km hr and a train is moving with velocity 40 km h towards east What is the velocity of the...
- Q is rotating about a vertical axis in the plane such that the angular velocity of the particle about the axis is constant and is equal to 1 rad s Distance...
- Q Three particles A B and C situated at vertices of an equilateral triangle all moving with same constant speed such that A always move towards B B always towards C...
- Q 5 A particle moves along X axis from x 0 to x 1 m under the influence of a force given by F 3x 2x 10 Work done in the...
- Q Light of wavelength 6000 is incident on a thin glass plate such that angle of refraction into the plate of 60 If the smallest thickness of plate which makes it...
- Q Two resistances are joined in parallel whose resultant is ohm One of the resistance wire is broken and the effective resistance becomes 20 Then the resistance in ohm of the...
- Q 0 2 0 1 1 2 M 3 4 If in the system shown the initial acceleration of wedge of mass 5M is then value of x is pulley are...
- Q 1 Three 60 W 120 V light bulbs are connected across a 120 V supply If resistance of bulb does not change with temperature then find out power delivered to...
- Q A sonometer wire of length is in resonance with a frequency 250 Hz If th length of wire is increased to then 2 beats per second are heard The ratio...
- Q In a hydrogen discharge tube it is observed that through a given cross section 3 13 x 1015 electrons are moving from right to left and 3 12 x 1015...
- Q Q55 A resistance R is stretched to four times its length Its new resistance will be 1 4 R 2 64 R 3 R 4 4 16 R 1 2...
- Q 9 The three resistances of equal value are arranged in different combinations shown below The current entering from the left is same in all cases Arrange them in increasing order...
- Q Consider the following nuclear reactions and select the correct statements from the options that follow Reaction 1 n p e Reaction II p n e v A Free neutron has...
- Q Magnification of a compound microscope is 30 Focal length of eye piece is 5 cm and the image is formed at least distance of distinct vision Find the magnification of...
- Q two A long cylindrical iron core of cross sectional area 5 cm is inserted into a long solenoid having 2000 turns and carrying a current 2A The magnetic field inside...
- Q Question No 8 Ring A can slide on a smooth horizontal rod and block B can move vertically Both are attached by an inextensible string At a certain instant velocity...
- Q 8 A 400 kg boat is 6m long It is floating in still water and is at rest A person of mass 80 kg moves from one end of the...
- Q ns pl For given R L C circuit find out the peak current and resonance frequency 100mH 100 F wwwww 1 2A 10 Hz 2 Z R x x 120...
- Q Q22 The sun appears two minutes before the actual sunrise due to atmospheric refraction How does sunlight travel from space to atmosphere b to Sun Sun Atmosphere Atmosphere d Sun...
- Q The coordinate of a point where parallel rays are focussed by the thin convex lens is where focal length of convex lens is 10 cm and it is placed along...
- Q Q58 The potential difference between points A and B of the adjoining figure is A 55 592 D www 1 V 2 V 3 V 4 2 V 1 592...
- Q In adjacent diagram the ratio of mass m and m m m so that they remain at rest given all surfaces are smooth and inclined faces are fixed is 16...
- Q A body travels the distance AB with speed 2 m s Thereafter it travels BC with speed 1 5 m s and the remaining CC 1 1 with 0 5...
- Q The diagram shows a concavo convex lens of RI What is the condition on the refractive indices so that the lens is diverging 2R 1 2u3u 1 3 3 2...
- Q 40 electric field line if in the electric field of a source charge Q The test charge will not follow path of Fixed Source Test charge charge 1 It has...
- Q A simple penauium of lengin L IS constructed from a point object of mass m suspended by a massless string attached to a fixed pivot point A small peg is...
- Q Cost of coal is 5 per kg and can produce energy of 20 MJ kg If a power station uses coal to produce electricity with 25 efficiency then the cost...
- Q Aakash Rank Booster Test Series for NEET 2020 11 An unpolarised beam of light is made to incident on an arrangement of four polarising sheets arranged in such a way...
- Q at will be process electron atom of r s model o be true f electron 4 Only a b and d are correct 36 In the circuit given below neglecting...
- Q The electric field at the origin is along the positive x axis A small circle is drawn with the centre at the origin cutting the axes at points A B...
- Q 29 A car P is moving with a uniform speed of 72 km h towards another car Q at rest on a straight level road At a particular instant when...
- Q 12 In YDSE when a thin transparent sheet of thickness t and refractive index u 1 5 is placed just in front of upper slit the central bright fringe shifts...
- Q When the angle of incidence on a material is 60 the reflected light is completely polarized The velocity of the refracted ray inside the material is in ms 1 3...
- Q A hydraulic lift is designed such that cross sectional area of its arms are 5 cm 10 m Find the force applied by mechanic or smaller area in order to...
- Q Two cars A B start from rest from the same point in same direction with acceleration 8 m s2 4 m s respectively then acceleration of car B in frame...
- Q When the nucleus of an atom absorbs one of the atom s orbital electrons the process is known as k capture Which equation in which X denotes the appropriate particle...
- Q A particle of mass m describes a circle of radius r The centripetal acceleration of the particle is 4 r2 The momentum of the particle is O 4m O2m EN...
- Q One mole of an ideal the process AB as shown in the T V indicator diagram If volume of the system changes from Vo to 0 2V then the amount...
- Q If time taken by a simple pendulum for 10 oscillations is measured as 50 s with stop watch of least count as 1 s Maximum permissible percentage error in the...
- Q The aperature of telescope is 5 cm distance between moon and earth is 4 10 km Find the minimum separation between two objects on the surface of moon which can...
- Q marks A string is wrapped round a log of wood and it is pulled with a constant force F as shown in the figure Tension in the string increases with...
- Q A Q4 Two battries of emf 1 2 and internal resistance r r2 as shown in figure The effective emf of the circuit acr 1 1 2 3 4 1...
- Q R with a coil of inductance L in series with them The power source could be an AC or a constant voltage DC source When AC source is applied then...
- Q 3 After the switch is closed the current will increase in which resistor s 252 352 492 552 A 192 B C D E 10 20 30 40 Lit
- Q marks For a particle of mass 1 kg moving with a constant acceleration in any interval of time when initial and final velocities are u and v the average velocity...
- Q A proton and an a particle are accelerated through a potential difference of 100 V The ratio of the wavelength associated with the proton to that associated with an a...
- Q According to Bohr s theory the energy of an electron in hydrogen atom in states corresponding to n 1 2 3 4 is repsectively 13 6 eV 3 4 eV...
- Q Three travelling waves in same direction are superimposed The equations of wave are y Ao sin kx wt y 3 2A sin kx cot and y3 4A cos kx wt...
- Q Problem 7 8 A certain cloud consists mostly of supercooled wa ter droplets at 10 C and maintains the ambient air at saturation with respect to liquid water at that...
- Q Pulleys P and P are smooth and fixed The light pulley P is moving upwards by applying a forc F of 120 N The pulley P is also light and...
- Q Zero Marks A stone is dropped from a certain height The ratio of speeds averaged over total distance and total time of fall is x 3 value of x is...
- Q ns 1 Activity of a sample is A at time t If it s activity is at time t then find the average life 5 t t n5 1 1...
- Q For a hydrogen atom when electron jump from n 2 to n 1 then wave length of radiation emitted found to be Then for which transition of electron of a...
- Q A circular loop of radius R is bent along a diameter L and given a shape as shown in figure One of the semi circles KNM lies in the x...
- Q Negative Marks Two moving particles P and Q are 10m apart at a certain instant The velocity of P is 8 m s making 30 with the line joining P...
- Q Which of the following is always true regarding the change in entropy of an ideal gas during an isothermal process The change in entropy depends only on the amount of...
- Q 4 Assertion In parallel LCR circuit anti resonance can take place Reason Anti resonance takes place if inductive and capacitative reactances are equal and opposite a
- Q 15 Consider a monochromatic linear source of light which is placed at a distance of r from a very small metal plate Due to photoelectric effect electrons are ejected at...
- Q The magnetic field strength due to a short bar magnet on its axial line at a distance y is found to be B Find the magnetic field strength at the...
- Q A bomber flying upward at an angle of 53 with the vertical releases a bomb at an altitude of 800 m The bomb strikes the ground 20 s after its...
- Q When a mass M is attached to the spring of force constant k then the spring stretches by length 1 If the mass oscillates with amplitude 1 what will be...
- Q PARAGRAPH Relation b w friction and applied force for a block of mass 2 kg on rough horizontal surface is given by below graph 27 28 fL 20 NL fk...
- Q Q69 A cell of negligible resistance and e m f 2 volts is connected to a series combination of 2 3 and 5 2 The potential difference in volts between...
- Q A bar magnet is lying in equilibrium inside a uniform magnetic field B If W be the work done to rotate it through an angle 0 then the torque required...
- Q 1 10 10 cm 2 10 20 cm 3 20 10 cm 4 20 20 cm A convex lens forms an image at a distance 10 cm when a parallel...
- Q Q66 Referring to the figure below the effective resistance of the network is r ww 1 2r 2 4r 3 10r 4 5r 2 r www r r 92 From...
- Q View In English Diagram shows symmetrically placed rectangular insulators with uniformly charged distributions of equal magnitude At th origin the net field Enet is aligned with the negative x axis...
- Q An electron mass m with an initial velocity v v i v 0 is in an electric field E Ei Eo constant 0 It s de Broglie wavelength at time...
- Q In the arrangement shown in figure the mass of the wedge Mis 10 kg and the mass of the body mis 4 kg The coefficient of friction between wedge M...
- Q A tuning fork of frequency 340 Hz is held vibrating at the open end of an empty measuring cylinder of length 100 cm Water is then poured in it slowly...
- Q variation of mobility u of electrons with applied electric field E in a metallic conductor HA 1 2 3 HA E E E
- Q iTutor All India Aakash Test Series for NEET 2021 3 Two conducting spheres of radii 2 cm and 4 cm have equal surface charge density The ratio of electric potential...
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