Basic Physics Questions and Answers

of this cell is OT Q13 Derive condition for balanced wheatstone bridge condition Paragraph Q14 Electrons in a conductor are moving randomely due to thermal energy this making it s average velo with drift velocity

Two wires of the same material and length are stretched by the same force Their masses are in the ratio 3 2 Their elongations are in the ratio Question Type Single Correct Type 13 2 2 9 4 3 2 3

In an oscillation of L C circuit the maximum 38 charge on the capacitor is Q The charge on the capacitor when the energy is stored equally between the electric and magnetic field is ON 1 f 2 3 olm 4 3 200 W L Caff a faga aga fer 1 f 4 2 3 ok

Two identical capacitors each of capacity C are charged upto same potential V Now their oppositely charged plates are connected together then calculate the a energy of each capacitor before connection b potential of each capacitor after connection c charge of each capacitor after connection d energy stored in each capacitor after connection e energy loss in the form of heat

40 A long solenoid has 1000 turns when a current of 4A flows through it the magnetic flux linked with each turn of the solenoid is 4 x 10 wb the self inductance of the solenoid is b 4H a 1H 0 3H

A 0 012 kg sample at its melting point of liquid gallium metal is added to 50 0 g of water in a polystyrene Styrofoam calorimeter The temperature of the water changes from 24 0 C to 27 8 C as the gallium solidifies Calculate the molar enthalpy of solidification for gallium 5 Marks

2 b a In a potentiometer of 10 wires the balance point is obtained on the 7th wire To shift the balance point to 9th wire we would a decrease resistance in the main circuit b increase resistance in the main circuit c decrease resistance in series with the cell whose emf is to be measured d increase resistance in series with the cell whos emf is to be determined

30 24 AL 7 Marginal Willingness to Pay 24 Using the above information and graph complete the below statements filling in your final complete answer in the space provided to the right of the statement Do not show your work or calculations A BI a The marginal willingness to pay of the 5th unit of this product is equal to b The total willingness to pay for 5 units of this product is equal to c The value of 5 units of this product is equal to MWTP d If P MWTP of the 5th unit total expenditure this product is TH 54

A thin plate separates two liquids of coefficients of viscosity n and 4n kept between two fixed plates as shown If plate has to be pulled by applying d minimum force then d is F 1 Question Type Single Correct Type 1 2 2 00 3 3 d d

A charged particle enters in a magnetic field in a direction perpendicular to the magnetic field Which of the following graphs show the correct variation of kinetic energy of the particle with time t

39 An engine is moving on a circular path of radius 100 metre with a speed of 20 metre per second The frequency observed by an observer standing stationary at the centre of circular path when the engine blows a whistle of frequency 500 Hz is 1 more than 500 Hz 3 500 Hz 2 less than 500 Hz 4 no sound is heard 7 1 13 3 19 4 25 2 31 1 37 4 43 2

A capacitor of 2uF draws a current of 4 mA 28 when connected across an a c of 300 Hz The voltage drop across capacitor is 1 1 06 V 2 1 5 V 3 2 1 V 4 6 6 V 2uF enten den 4 mA ferit ut farvater 1 1 06 V 3 2 1 V 300 Hz ac Enfaat dan 2 1 5 V 4 6 6 V

4 6 6 V A student connects a long air cored coil of 29 manganin wire to a 100 V D C supply and records a current of 25 amp When the same coil is connected across 100 V 50 Hz a c the current reduces to 20 A the reactance of the coil is 1 30 2 40 3 5 0 4 None of these 3 2 1 V 4 6 6 V va faerit at ang ate geeft fea a 100 V D C 25 A 100 V 50 Hz Andit atque auferat 1 30 3 5 02 2 40 4

A triangle ABC is given where vertex A is 1 1 and the orthocenter is 2 4 Also sides AB and BC are members of the family of lines ax by c 0 where a b c are in AP 53 54 The vertex B is A 2 1 The vertex C is A 4 16 B 1 2 B 17 4 C 1 2 C 4 17 D none of these D 17 4

What should be the ratio between the leng radius of the uniform solid cylinder so t moment of inertia about central axis is the as that about equatorial axis 2 3 1 3 3 2

What is angular spread between central maxima and first ordered maxima of diffraction pattern due to single slit of width 0 25 mm w light of wavelength 600 nm is incident on it normally O 3 6 x 10 3 rad 4 2 x 10 3 rad 1 2 x 10 3 rad 2 4 x 10 3 rad

2 ALLEN A cylindrical metallic rod in thermal contact with 42 two reservoirs of heat at its two ends conducts an amount of heat Q in time t The metallic rod is melted and the material is formed into a rod of half the radius of the original rod What is the amount of heat conducted by the new rod when placed in thermal contact with same two reservoirs in time t 1 999 2 3 26 27 2 16 and action for at and GET aft forf fen ve soffren a fontari 3 1

4 All reach the ground with same velocity 4 M A solid cylinder of mass M and radius R rolls 22 down an inclined plane without slipping The speed of its centre of mass when it reaches the bottom is h is the height of inlined plane 1 2gh V3gh 2 3 Vash 4 4g h deh 2gh 1 2 V3gh 48h a fel de 4g h ne questionper d

Find the magnitude of induced emf in the loop if magnetic field is changing as B Bot O B R O B 2 R O BR O Zero

The total kinetic energy of a body of mass 10kg 15 and radius 0 5m rolling with a velocity of 2 m s without slipping is 32 8 J The radius of gyration of the body is Telegram neetquestionpaper 1 0 25 m 2 0 2 m 3 0 5 m 4 0 4 m 10kg fan fhuc at an af gut from groft 30 5m 2 m s 332 8 1 0 25 m 3 0 5 m 2 0 2 m 4 0 4 m

2 84 A heavy particle of mass 1 kg is suspended from a massless string attached to a roof A horizontal force Fis applied to the particle such that in the equilibrium position the string makes an angle 30 with the vertical The magnitude of the force F equals A 10N C 5 N B 10 3 N D 10 3 N 30 Figure 2 180

1 Total energy density of electromagnetic waves in vacuum is given by the relation 1 E B 2E0 2po 2 EE MOB 3 E B C 2 4 EE B 2 0 R TEST SERIES JOINT PACKAGE COURSE UG 2021 11102020 Araia faya grad vere ata Telegram ne estio 1 3 B 280 2 0 2 50E E B C HoB2 4 EE B 2 0 Space for Rough Work ferg Grie 0999DMD310320008 LTS Page 13 48

1 A body of mass 3 kg travelling along a straight horizontal path covers a distance of 5 m in its 5th second of motion If it starts from rest the momentum of the body 3 s after its start of motion is 10 10 20 2 kgms kgms 3 3 10 kgms 4 kgms 3 2 The displacement of a particle having 1 kg mass in two successive 2 second intervals are 10 m and 4 m respectively If it starts with initial velocity 20 m s the momentum of the particle after 76 m displacement is 1 9 kgms 2 18 kgms 3 27 kgms 3 Two objects are connected by a string that passes over a frictionless pulley as shown in the figure where m ma and as and as are the magnitudes of the respective accelerations Which mathematical statement is true regarding the magnitude of the acceleration as of the mass m 1 a g 3 a2 g 4 The momentum of a body moving on a straight path vaires with time according to the graph shown in the figure The average force acting on the particle between t 0 tot 6 sis 1 0 75 N 2 1 67 N 3 0 33 N 4 zero 5 An object of mass m is acted upon by two antiparallel forces F and F F F If the change in velocity of the of the object is AV in time AT the force F in terms of F is AV AV 1 F F M3 2 F F M At 3 F F At 1 At MAV 4 F F MAV At Momentum kgm s 4 36kgms 4 a a 4 4 Time s 6 When a man climbs up the stairs without holding the railings the action and reaction force pair are 1 normal reaction by the step on him his weight 2 his weight normal reaction by the step on him 3 his force pushing the step horizontally forward force by the step horizontally backwards 4 force of his foot vertically downwards force by the feet vertically upwards Marked Incorrect ov Next

A solid sphere hollow sphere and disc all 23 having same mass and radius are placed at the top of an incline and released The friction coefficient between the objects and the incline are same and not sufficient for pure rolling of any one these Least time will be taken in reaching bottom by 1 Solid sphere 2 Hollow sphere 3 disc fantas 1 2 stellenl 3 f it and at a te num a uni f 84

In Young s double slit experiment green light with wavelength 5500 is used and 60 fringes were seen in field of view Now sodium light of wavelength 5890 A is used then number of fringes observed in field of view are about O 42 O 48 O 56 072

The refractive index of glass with respect to water is 9 8 If the velocity of light in glass is 2 108 m s What is velocity in water 2 6 x 108 m s 2 25 x 108 m s O 2 5 x 108 m s O 2 9 108 m s

The eye piece of an astronomical telescope has focal length of 10 cm The telescope is focussed for normal vision of distant objects when tube length is 1 0 m What is magnifying power of telescope 09 0 12 0 15 0 16

Q From the top of a 11m high tower a stone is projected with speed 10 m s at an angle of 37 as shown in figure Find a Speed after 2 s b Time of flight c Horizontal range d The maximum height attained by the particle e X Speed just before striking une ground 11 m 10 m s 37 n

Section b This section contains 15 SINGLE CORRECT TYPE questions Out of these 15 questions candidate can choose to attempt any 10 questions A particle of mass m and charge a accelerate by potential difference Vand enters a region of uniform transverse magnetic field 8 if dis width of region of magnetic field d the angle through which particle deviates is sni Bd 9 2mV

Section A This section contains 35 SINGLE CORRECT TYPE questions Each question has 4 choices 1 2 3 and 4 out of which only one is correct The balancing length for a cell is 560 cm in a potentiometer experiment When an external resistance of 10 n is connected in parallel to cell the balancing length change by 60 cm The internal resistance of cell in ohm is 16 O 14

9 Figure shows a Young s double slit experiment setup The source S of wavelength 4000 oscillates along y axis according to the equation y sin t where y is in millimeters and t is in seconds The distance between two slits S and S is 0 5 mm YA S 0 0 0 5 mm Im 4m vain P DS 8

2 47 Find the mass M in the situation shown in figure 2 212 such that m remains at rest on the front surface of M The coefficient of friction between the front surface of M and that of mis u Ar m M cose M m Figure 2 212 M

A particle is thrown up inside a stationary lift of sufficient height The time of flight is T Now it is thrown again with same initial speed vo with respect to lift At the time of second throw lift is moving up with speed vo and uniform acceleration g upward the acceleration due to gravity The new time of flight is T 2 C T D 2T A T 4 B

et N denote the set of all natural numbers Define two binary relations on Nas x y e Nx N 2x y 10 and R x y e Nx N x 2y 10 Then 1 Both R and R are transitive relations 2 Range of R is 1 2 3 4 3 Range of R is 2 4 8 1 Both R and R are symmetric relations

8 A beam of light has a small wavelength spread 82 about a central wavelength The beam travels in vacuum until it enters a glass plate at an angle 0 relative to the normal to the place as shown in figure The index of refraction of the glass is given by n The angular spread 80 of the refracted beam is given by a 80 1212862 c 80 tan0 dn n d 82 b 80 d 80 dn 2 d SA sin 082 sin A a 0 80 Vacuur Glass

D Two cells when connected in series are balanced on 8 m on a potentiometer If the polar one of the cell is reversed they balance on 2 m The ratio of emf s of the two cells is a 3 5 c 3 4 b 5 3 d 4 3

Consider a conical pendulum with a bob of nass 80 kg and length of string 10 m that makes an angle of 5 degrees with the vertical Determine a the horizontal and vertical components of the force exerted by the string on the pendulum and b the radial cceleration of the bob Also can you please draw out the horizontal and vertical forces on the picture please it would help me better to see it

For example if a body is having acceleration of 1 m s 2 it means that body is increasing it speed at the rate of 1m s similarly if a body is having momentum of 5 kg m s What does it mean kindly explain in easy and simple language I am trying to find out but it is not clear to m

A fix amount of nitrogen gas 1 mole is taken and is subjected to pressure and temperature variation The experiment is performed at high pressure as well as high temperatures The results obtained are shown in the figures The correct variation of PV RT with P will be exhibited by UPSEAT 2001 PV RT a 4 c 2 2 0 1 0 4 3 2 b 3 d 1 1 100 200 400 600 P

9192 mg A pendulum bob of mass 80 mg and carrying a charge of 2x 10 8 C is at rest in a horizontal uniform electric field of 20 000 V m Find the tension in the thread of the pendulum and the angle it makes with the vertical Take g 9 8 ms

15 Calculate the weight of lime CaO that can be prepared by heating 200kg of limestone CaCO3 which is 95 pure a 88 4kg b 106 4kg c 65 7kg d 198 3kg 16 A sample of PCl3 contains 1 4 mole of the substance How many atoms are there in the sample a 5 6 x 1023 b 8 43 x 1023 c 3 37 x 1024 17 The incorrect statement for 14g CO is a It occupies 2 24L at STP b It corresponds to mole of CO d 2 40 x 1024

Induction and R are placed iding If R R will be directly MP PET 2001 the circuit The OB I is decreasing An inductor L 100 mH a resistor R 1009 battery E 100V are initially connected in series as show in the figure After a long time the battery is disconnecte after short circuiting the points A and B The current in the AIEEE 2006 circuit 1 ms after the short circuit is a e A b c 1 A 1 e A 0 1 A vold L moooooo A B www R A metallic square loop u in a uniform with velocity its plane as shown in the fig a In AD but not in BC b In BC but not in A c Neither in AD nor d In both AD and 18 A conducting rod angular speed wat E with bob of mass m and conduct

Consider a rubber ball freely falling h 4 9 m onto a horizontal elastic plate Assume that the duration of collision is negligible and the collision with the plate is totally elastic Then the velocity as a function of time and the height as a function of time will be m a b c TV A d 7 X 2 37 47 MA V1

S 0 05m is kept 10 5T When the around any of its the coil will be NEET 2019 dy current effect is NEET 2019 etic braking in train heater ws the variation in magnetic flux t with time through a coil Which of the statements given below is not correct AMU Engg 2001 A E D a There is a change in the direction as well as magnitude of the induced emf between B and D b The magnitude of the induced emf is maximum between B and C c There is a change in the direction as well as magnitude of induced emf between A and C ad amf is not zero at B F13 time t in a coil if a

at 49 Water flows through a frictionless duct with a cross section varying as shown in figure Pressure p points along the axis is represented by LAS 3 AP X AP X

D A block of mass m is pushed against a spring of spring constant k fixed at one end to a wall The block can slide on a frictionless table as shown in figure 8 W6 The natural length of the spring is Lo and it is compressed to half its natural length when the block is released Find the velocity of the block as a function of its distance x from the wall k 0000000 Lo 2 m

The depth of an ocean is about 3000 m Calculate the percentage compression of the water at the bottom of the ocean Bwater 1 5 10 N m 2 1 3 3 6 2 4 0 2

Example 4 4 The position of a particle is given by r 3 0t i 2 0t j 5 0k where t is in seconds and the coefficients have the proper units for r to be in metres a Find v t and a t of the particle b Find the magnitude and direction of v t at t 1 0 s

Which factors typically motivate changes to employment laws how often employers get in trouble with the law and the government in power what the government thinks is best for employees and changing social values demographic shifts in society and changing social values

A projectile is thrown in the upward direction making an angle of 60 with the horizontal direction with a velocity of 147 m s Then the time after which its inclination with the horizontal is 45 is g 10 ms 2 1 5 38 s 2 3 15 s 4 2 745 s 10 98 s