Basic Physics Questions and Answers

A horizontal spring is connected to a mass M It 14 ff at the te 81 ral executes simple harmonic motion When the mass M passes through its mean position an object of mass m is put on it and the two move together The ratio of frequencies before and after will be 1 1 3 m 1 2 M M M m 1 2 2 1 1 M M m En anala f fefifi ya aen are an sigulda 1 1 7 7 2 3 Mm 0 MM M m m 1 2 1 2

22 A hollow conducting sphere of radius 2 cm is charged such that the potential on its surface is 20 V The electric potential at the centre of the sphere will be 2 cm G M E SE VOR drid faul Gill 20 va fagya faha OPTIONS MARK FOR REVIEW CLEAR SELECTION OA 10 V OB 20 V OC 25 V OD 30 V

ALLEN The potential energy U of a particle is given by 15 U 20 x 4 J Total mechanical energy of particle is 36 J select the correct alternative 1 The particle oscillate about x 4 m 2 The amplitude of the particle is 4 m 3 The kinetic energy particle at x 2m is 12 J 4 All to above ff U 20 x 4 J 36 1 x 4a ale 2 31444 m 3 x2m 12 J 4 34 an

us facing Ropenius 3d and tod OPTIONS MARK FOR REVIEW CLEAR SELECTION Potential is zero everywhere inside the conductor OA faya ada CIER PR M CHE KHU OB Field is zero inside the conductor BERPE Field is non zero and uniform inside conductor E EM BER 302 AUT PORTA

For a point charge the equipotential surface is in shape of faxi f g sidri f u Th ya Ads 1 30R OPTIONS MARK FOR REVIEW CLEAR SELECTION DA B Sphere Ju Paraboloid DUER

Test 1 Code A 15 In the infinite ladder network shown below if 15 oid as a R 1 235 2 then the effective resistance between R 1 2352 la a the points a and b approximately is 5 2 235 VIEI 5 2 235 1 0 145 2 3 20 aw be A 1 R R 1 3 A from a to b 3 2 A from b to a 3 40 V R www R R R 2R 7 4R 5 5 volt 12 R www 3 202 16 The current through the 2 2 resistor in the circuit 16 fataal shown below is 232 www 2R 2 10 volt 102 4 17 The current flowing through the 3 2 resistor in the circuit shown below is 192 302 www R 20 V 1 75 x 10 2 5 2 74 x 10 2 5 3 75 10 10 10 2R 1 15 A from a to b 2 15 A from b to a 3 25 A from a to b 4 No current will flow through 32 resistor 18 The equivalent resistance between A and B is 2 2 3 A from b to a 4 1 A from b to a b www 2R 4 R 5 1 2 3 5 2 202 52 5R 7 22 3R 4 20 B All India Aakash Test Series for NEET 2022 19 The resistance of the resistor shown below is Ole Violet Green Orange Gold 5 41 8 17 3 be 1 0 145 2 1 All India Aakash Test Series for NEET 2022 mi 3 40 V 18 A B 1 3 A from a ell b 3 2 A from ben a 2R R 4R G R www 1 02 R R R R 12 20 5 valt 102 R R 1 15 A from a to b 2 15 A from b to a 3 25 A from a to b 4 30 resistor slut R wwww www 2R 10 volt 142 2 4932 52 2 3 A from b ell a 4 1 A from ball a mien a uma fayda 30 www 1 75 x 10 2 5 3 5 14 15 50 20 V 2 74 x 10 2 5 3 175 x 1031 0 10 2R www 2R 5 2 4 2 202 www 5R 2 3R 4 Regd Office No 111 8th Cross Paramount Gardens Thalaghattapura Kanakapura Main Road Bengaluru 560062 20 B 19 do you ole Vialet Green Orange Gold Test 1 Code A

With what maximum speed a car can turn round a curve of 18 m radius on a level road if the coefficient of friction between the tyres and road is 0 2 1 18 km h 2 19 6 km h 3 21 6 km h 4 23 6 km h

A heated body emits radiation which has 8 maximum intensity at frequency f If the temperature of the body is doubled 1 The maximum intesity radiation will be at frequency 2 2 The maximum intesity radiation will be at frequency fm 3 The total emitted energy will increase to 2 times 4 The total emitted energy will increase to 8 times uffa fafanya sif affa di ufe aeg an ary drgan 1 farfantur ft 3rf af f 2 fafar fud a Eft 3 helfeld 2 4 fa

An underwater sonar source operating at a 21 frequency of 60 kHz directs its beam towards the surface If velocity of sound in air is 330 m s wavelength and frequency of the waves in air are 2 3 30 m 60kHz 1 5 5 mm 60 kHz 3 5 5 mm 30 kHz 4 5 5 mm 80 kHz 60 kHz Bi zu ai ur t ang an t a gad ain vi V 330 m s 1 5 5 mm 60 kHz 3 5 5 mm 30 kHz 2 3 30 m 60kHz 4 5 5 mm 80 kHz

a a d b 4a 26 A body projected with velocity u at projection angle has horizontal range R For the same velocity and projection angle its range on the moon surface will be gearth 6 9moon DUR b a 36R 36 Rad c R 16 d 6R 3

A block of mass 40 kg is placed on rough horizontal surface whose coefficient of friction is 0 3 If a horizontal force of 100 N is applied on it then acceleration of block will be 1 10 m s 2 5 m s 3 15 m s 4 None of these

of the 22 A projectile is fired from level ground at an angle above the horizontal The elevation angle highest point as seen from the launch point is related e by the relation 1 a tan o o tan o 4 1 2 tan 0 tan 0 b tan tan 0 d tan p 2 tan 0

A sample of gas was first compressed from V to at a constant pressure of P The sample was then cooled so that the pressure went from P to P while the volume remained constant at V Finally the sample was allowed to expand from V back to V while the pressure increased from P back to P as shown in the diagram Which of the following statements is correct pressure ON volume The area A represents the energy that is lost by the gas in this cycle O The ares A B represents the energy gained by the gas in this cycle The area A C represents the energy gained by the gas in this cycle The area 8 D represents the energy gained by the gas in this cycle There was no energy lost or gained by the gas in this cycle

nose 3 What is a splint How and why should it be used 4 We must not prick blisters Why 5 How will you put out a fire caused by defective electric wiring 6 What first aid should be given in case of an animal bite

5 km b 3 km c 6 km d 11 A body is thrown horizontally from the top of a tower of height 5 m It touches the ground at a distance of 10m from the foot of the tower The initial velocity of the body is g 10ms 2 a 2 5 ms 1 b 5 ms 1 c 10 ms d 20 ms 1 1

Abus starts from rest with an acceleration of 1 ms2 A man who is 18 m behind the bus starts with uniform velocity of 10 ms Then minimum time after which the man can catch the bus is 1 2 S 2 4 S 3 12 S 4 8 S

A 0 5 kg ball moving with a speed of 12 3 ms strikes a hard wall at an angle 30 with the normal It is reflected with the same speed at the same angle If the ball is in contact with the wall for 0 25 s the average force acting on the wall is 1 96 N 30 3d 2 72 N 3 48 N 4 24 N

Let us consider an infinitesimal spherical shell of radius x in the sphere as shown in the figure Shell m di dq pdV di dq x du x 0 2 dq pw I I it I I Let dq be the charge present in the shell As the solid sphere as charge Q over its volume 12 0 I I T dq px 2 xdx x cos 0d0 When the sphere rotates with angular speed w Let di be the current in disc xe px 2 x cos 0dxd0 w 2 From this Magnetic moment of the disc du di x Area of elemental disc Solid sphere x dx A W px 2 x os 0dxd0 w 2 Integrating on both sides we get 22 75 T X Tx cos 0 cos ede

4 A particle of mass m is projected with a velocity v making an angle of 45 with the horizontal The magnitude of the angular momentum of the projectile about the point of projection when the particle is at its maximum height his 1 2 m 2gh 3 mv 4 2g my 2 2g 4 Both 1 and 2 dations

Steam at 100 C is passed into 20 g of water at 10 C When water acquires a temperature of 80 C the mass of water present will be Take specific heat of water 1 cal g C 1 and latent heat of steam 540 cal g Question Type Single Correct Type 1 24 g 2 31 5 g C 125 g

A galvanometer having a resistance 20 Q is shunted by a wire of resistance 2 Q If total current is 2 A The part of it passing through the shunt is 10 4 56 20 11

2 A block of metal is lying on the floor of a bus 42 The maximum acceleration which can be given to the bus so that the block remains at rest will be 1 g 10000 1 A function is y x The approximate value of 43 48 and av att du har feen anden for better feet to 1 pg y x x2 0001

52 A wedge of mass 1 kg is kept on a smooth ground A small block of same mass can move along the frictionless surface of the wedge The angle of inclination of wedge is 30 with the horizontal Normal force applied by the wedge on the ground in N will be g 10 m s

If the wavelength of incident light on a soap film is 700 nm then its minimum thickness 10t nm so that constructive interference in reflected light can be observed The value of t is Take refractive index of the film as 210 Correct Answer

4 point A carrom coin of mass 5 gram moving with speed 2 m s strikes elastically with the board wall at 45 If it remains in contact with the wall for 0 02 second then the average force acting on the coin is approximately 02N 02 2N 2 O 1 N 2 2 N

Massless rod has been suspended by two identical strings A and B as shown in figure They are vibrating in unison with same frequency and number of loops in A and B is 3 and 2 respectively Position of mass m from center of rod comes out to be 51 13n Find the value of n A m B Massless ro

A particle is moving along x axis Its position varies with time as x 37 27t t where x is in metre and t is in seconds The distance of particle from origin O when it comes to rest is O 65 m 78 m 0 91 m 127 m

A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference I esu Ife and m are charge and mass of an electron respectively then the value of h z where 2 is wavelength associated with electron wave is given by 1 2meV 2 meV 3 2mcy 4 meV

2 For an optical element the graph between 1 v and u is given Assume paraxial ray approximation has bee used Symbols have their usual meaning For plotting the graph the following sign convention is used www J T OKS IN 1 v a Pole is taken as origin c Principle axis is used as one of the axis The nature of mirror is A Convex mirror our B Concave mirror b Direction of incident light is ve C Converging lens D Diverging lens

is increased 1S 3 R is increased 4 R is decreased In the branch AB of a circuit as shown in the figure a current I t 2 A is flowing where t is the time in second At t 0 the value of VA VB will be L 1H R 30 Bo 1 000 mA m 10 V 1 3V 2 3V 3 5V 4 5V

Q No 31 If x be half the included angle of thread and p its pitch then best size wire s diameter for measurement of effective diameter of thread is A P12 sec x B P sec x 2 C P cos x 2 D P12 cos x 2

A particle is moving eastwards with a velocity of 20 m s In 10 s the velocity changes to 20 m s northwards The average acceleration of particle during this time is 0 ms 2 2 2 ms N E 2 2 ms N W 20 ms 2 S E

57 Work Energy Theorem Contact Number 16 9667591930 8527521718 ty 20 A force of 5 N making an angle with the horizontal ght of acting on an object displaces it by 0 4 m along the horizontal direction If the object gains kinetic energy of 1J the horizontal component of the force is 10 1 1 5 N 2 2 5 N 3 3 5 N 4 4 5 N

In figur water level of a wide lake transmits microw towards a receiver on the opposite shore a distance x above the water level The microwaves reflecting from the water interfere with the microwaves arriving directly from the transmitter Assuming that the lake width D is much greater than a and x and that a at what values of x is the signal at I the receiver maximum Solution Figure 6 9 The wave which gets reflected from the water surface suffers a 2 phase changes of rad or path difference of 2 The reflected wave appear to be coming from the image of the transmitter in the water level The situation is shown in below figure 6 10 SIT 2N 1 Figure 6 10 R The path difference between the waves receiving at R is Ar 2a sin 0 x Ax 2a The em is the mi the Sa Pa As lake width is much greater than the transmitter and receiver heights we can take 0 to be very small So we can use Ar 2a0 The effective path difference including the reflection from water surface will be given as

The position Vo X a 1 x of a particle at time t is given by at where Vo is a constant and a 0 The dimensions of Vo and a are a MOLT 1 and MOLOT b MOLTO and M LT c MOLT and MLT d MIT 1 and MT

E g 10 If F FN Fw and F be the gravitational nuclear weak and electromagnetic forces respectively ther arrange them in proper order as per their strength 1 F FN Fw FE W 2 F Fw F FN g 3 FE FN Fw F

Aakash Institute 57 Magnetic field in a region is given by B B 28 Find torque on the loop shown in figure Each wire segment is of length LJ 2 L B K 4 21L B K 1 iL B K 3 2L B K

62 TANY 12 18 24 5 Work is said to be done by a force on a body if OPTIONS MARK FOR REVIEW CLEAR SELECTION A The body has displacement in the direction of force B The angle between force and displacement vector is other than 90 OC The angle between force and displacement vector is 90 D Both 1 and 2

A 60 0 cm guitar string under a tension of 50 0 N has a mass per unit length of 0 100 g cm What is the highest resonance frequency of the string that can be heard by a person able to hear frequencies upto 20 000 Hz id supports with a tension o

In the given arrangement of parallel plates Each plate has distance between two consecutive plates is d Theequivalent capacitance of the system between x and y sgiven as K 2 O EO A d 20A d 33 2012 20 A d K 3 K 6

Q 18 Switch was initially at position 1 for a long time Now switch is shifted to position 2 Total heat produced in K resistor R after that is CE Find the value of K 10 2R www 20 3E

A weight lifter lifts a 400 N set of weights from around level to a position over his head a vertical distance of 1 75 m How much work does the weight lifter do assuming he moves the weights at constant spec

Electric potential energy possessed by a charge q placed a the equatorial position of an electric dipole P 2qa at a distance r from the centre of the dipole is Zero kq kq 2 kq

A cube of 10 N rests on a rough incline plane of slope 3 in 5 The minimum ford necessary to start the cube moving up th plane is the coefficient of friction is 0 6 1 1 2 N 3 4 8 N 2 10 8 N 4 14 8 N

If the density of air is a constant 1 29 kg m 3 how high does the Earth s atmosphere go if the pressure at sea level is 101 000 Pa Hint The pressure in space is O Pa 3 000 m 10 000 m 6 000 m 8 000 m

s excerpt from One Flu over the Cuckoo s ar scientists found that a very simple mutation ene could make a virus very easy to transmit ups also found many combinations of genes uld make the virus spread faster and cause it to e lethal Hualan says that health officials now what genes to monitor to warn of a dangerous mation ready to spread throughout the world so says her work tells vaccine researchers what to target The important thing is that insights uch studies will benefit disease control and ntion riginal controversy has not gone away And What best describes the key discovery of research in efforts to control diseases O Scientists found out which genes to monitor to find signs of danger O Scientists discovered a cure for all flu viruses O Scientists concluded that flu viruses easily transfer O Scientists still need to learn more in order to prevent epidemics

What s an advantage of using an EMR system O a It can improve patient outcomes Ob It increases reimbursement O c It s easier than using paper based medical records d It enhances patient privacy

ball is thrown straight upward at 28 0 m s initially What maximum altitude does it reach 40 0 m 32 9 m 10 0 m 27 4 m 19 6 m

Jacob just saw the movie Titanic on Netflix and LOVED IT So after he gets his Moderna booster he takes a Disney Cruise to Newfoundland Canada where the real Titanic sank and is on the look out for icebergs However due to global warming all the ice that Jacob sees are roughly 1 m cubes If ice has a density of 917 kg m 3 and the ocean water has a density of 1 025 kg m 3 how high will the 1 m 3 icebergs above the water so that Jacob can see them 0 6 m 1 0 m 0 1 m 0 4 m

f an object has constant acceleration its acceleration changes at constant rate displacement can never be zero velocity ca never be zero velocity cahges at constant rate displacement changes at constant rate