Basic Physics Questions and Answers

32 The minimum number of capacitors of capacitance 2 F in order to obtain resultant capacitance 5 F will be 2F 1 4 2 5 eller alfey for such a 3 7 gre unfal 5 F 4 8

D ce of radius R separates two medium of refractive indices and as shown in figure Where should an object be placed in the medium 1 so that a real image is formed in medium 2 at the same distance 1 O X H H H H P R M X I 2 M H H H R

Each of the resistors shown in the figure has 19 resistance R Find the equivalent r sistance between A and B 3 OR usiast Course 4 09092020 B SR TIR Space for Rough Work fax veftia vrte u b Bum 7R 1 22 ea HIR

16 g sample of a radioactive element is taken from Bombay to Delhi in 2 hour and it was found that 1g of the element remained undisintegrated Half life of the element is uch feuchard 16 fazi Arc atas fa 35 3714 1 2 hour fen a 2 1 hour 3 1 2 hour 4 1 4 hour fra anl

When a light wave of frequency 5x10 4 Hz is passed through a medium of refractive index 1 5 then its wavelength will become GR for 35 10 4 H ETARI I Found 1 5 1 4000 2 4500 3 6000 4 9000

For the circuit shown with R 1 0 R 2 0 E 2V and E E3 4 V the potential difference between the points a and b is approximately in V Main 8 April 2019 1 a 2 7 R www E wwww R b 2 3 a wwwww b R www R E c 3 7 wwwwwww E3 R d 3 3

Which of the following is correct for stomata apparatus of dicot plants GC Guard cells SC Subsidiary cells 1 Non green GC Green SC Pore 2 Green GC Green SC Pore 3 Green GC Non Green SC Pore 4 Non green GC Non Green SC Pore

In the measurement of physical quantity X C1 3D of the quantities A B C and D are 2 2 4 and 5 respectively Then the minimum amount percentage error in the measurement of X is contributed by 5271 1 A X A B C1 D the percentage error introduced in the measureme 2 B A B C D 324 fed 2 2 4 5 3 C 4 D

ALLEN A copper wire and an iron wire each having an area 6 of cross section A and length L and L are joined end to end The copper end is maintained at a potential V and the iron end at a lower potential V If o and a are the conductivities of copper and iron respectively the potential of the juction will be 2 3 0 V 0 V 01 L 02 L2 GIVI 02V L L 01 L 0 L2 01 L1 02 L2 01 V 0 V 01V 0 V 01 L 02 L Consider a thin square sheet of side L and 7 LL and fa ftare fit fac fava V data are farfava 1 2 3 a 0 V 0 V 01 L1 02 L2 GIVI 02V L L 01 L 0 L 01 L1 02 L2 01 V 02V 01V 0 V 01 L 0 L f feigur frival and ver P

Topic Current Electricity From Mobility Illustration To Point Potential Method Infinite Ladder Circuit 1 E denotes electric field in a uniform conductor 1 i corresponding current through it Va drift velocity of electrons and P denotes thermal power produced in the conductor then which of the following graph is incorrect K 2 KV 1 1 2 E E E a faga di i Affor K 2 2 K 3 P VA deduc E E

4 Independent of t There are two wires of the same length and of 8 the same material and radii r and 2r The ratio of their specific resistance is 1 1 2 2 1 1 2x 14 41 4 can r2r3 1 1 2 m 1 4 vard fr fafere fa 2 1 1 LAY 4 1

O No 22 View in English Electric charge on sphere A is equal to electric charge of sphere B The sphores are joined by conducting wire Then the wire is removed the common potential on each sphere is found to be the charge a oach sphere before joining is 2 3 4 Correct Answer 1 Your Answer 3 Vr 2K 2K 1 1 2K 1 2 K 1

4 In the diagram shown there are four forces acting on a block of mass 2 kg in space The acceleration of the block is 3m s in the direction as indicated Find the unknown force F 10 N ON a3m s 2 kg AN

A particle of mass 100 g charge C is placed on the vertical axis of a uniformly charged ring of radius 1m This particle is executing S H M of small amplitude with time period 2 s above the centre of the ring a shown in figure Then find the total charge in mC on the ring Take n 10 m In

V k V k 7 0 33 where k is constant It is an 1 Isothermal process 2 Adiabatic process Isochoric process 4 Isobaric process e Leader e Achiever MAZC D E F G H I J K L M MLE F G H I J K MAS

The absolute coefficient of expansion of liquid is 7 times that the volume coefficient of expansion of the vessel then the ratio of absolute and apparent expansions of the liquid is 1 www g 3 4 1

No 2 View In English A particle moves in the east direction with 15 m sec for 2 sec then northwards with 5 m s for 8 sec Average speed of the particle is 1 1 m s 5 m s 7 m s 10 m s 3 4 Correct Answer 3 Your Answer 2 Status incorrect

10 Prism 1 of mass m and with angle a see Fig 1 23 rests on a horizontal surface Bar 2 of mass m is placed on the prism Assum ing the friction to be negligible find the acceleration of the prism

The potential difference between points A and B is 2V 192 42 4V 192 1 2 3 3V 192 B 2V 6 V OV 3V

3 64 10 4 32 10 1 A conducting sphere of radius a is enclosed by a 21 conducting shell whose radius of inner surface is 2a and that of outer surface is 3a Charge given to conducting shell and conducting sphere are Q and Q respectively then what will be potential at centre of conducting sphere 3 KQ 2a Nm and Nm and 64 104 J 2KQ 3a 3a KQ 2a KQ 3a 3 64 10 Nm R 32 4 32 x 10 Nm 3 stafar from 2a a ST Telegram ne questionpaper C 3 Q far a fava KQ 2a 2KQ 3a 64 10 J me from 3a are s 3a a 4 KQ KQ 3a

1 points SCalcET8 2 6 058 Find a formula for a function that has vertical asymptotes x 6 and x 8 and horizontal asymptote y 6 f x

3 A charge particle of mass 10 gm charge 1 mili 23 coulomb is projected with velocity 30 m sec perpendicular to uniform electric field of strength 100 V m Its speed after 4 second will be 1 30 m sec 2 40 m sec 4 50 2 m sec 3 50 m sec If we have an irregularly shaned conductor as 24 10 facts and fact ci ferm 4 100 V m far ga 30 m sec fa 1 30 m sec 2 40 m sec 3 50 m sec 4 50 2 m sec afe Y SUGGE COVIC at du fam

Which of the following is an example of exot breed of cattle 1 Jersey 3 Frieswal 2 Sunandini 4 Karan Fries

A current of 3 2 mA is flowing through a 37 conductor then number of free electrons moving per see is 1 2 10 9 3 2 10 8 slast Course Il 2 2 10 6 4 2 10 7 4 20 N mAuft f 3 2 dve faster you recen 1 2 10 9 3 2 10 2 2 10 4 2 10

A solid sphere is moving and it makes an elastic collision with another stationary sphere of one fourth of its own radius After collision it comes to rest The ratio of the densities of materials of second sphere and first sphere is 1 4 2 8 3 16 4 64

Charge on surface x x is III 2 20 0 4 0 2Q 1 Q 2Q 3 20 0 last Course Il 1 47 14 xx 1 Q 2Q 3 20 0 Space for Rough Work fery Gre 2 20 0 4 0 2Q 1001CMD302220006 E H 22082020

A calcite crystal is placed over a dot on a piece of paper and rotated On viewing through calcite one will see 1 a single dot 2 two stationary dots 3 two rotating dots 4 one dot rotating about the other 12 se face una fam 1 2 at fr 3 4

The velocity of a projectile as a function of the time t is given as follows It is also known that the initial position of the projectile at t 0 is 7 0 0 0 24 Find the position vector of the projectile as a function of time t is r t v t 4t 66 44t 39 j 20t 27 k Bi

Please calculate the percent loss Percent Energy Loss mgh mgh mightin Experiment 1 Data Table 3 Determing Percent Loss Starting Position h m h m h m h3 m Percent Loss h to h Percent Loss hi to h Percent Loss hi to h3 Data Table 1 5 3 8 3 8 3 8 0 10 0 EEE Data Table 2 Data Table 3 4 3 2 3 1 3 0 x100 Data Table 4 EEE Data Table 5 3 2 6 2 4 2 5

The time period of a particle performing SHM is 18 s What is the time taken by make a displacement equal to half its ampli from its equilibrium position 1 3 s 2 2 s 4 1s 3 3 w S

A cylindrical container is filled with water upto the brim If the pressure exerted by the water at the bottom of the container is 1000 Pa the height of the container is cm take g 10 m s A 10 B 100 C 1 D 20

A particle projected from origin moves in x y plane with a velocity v 31 6xj where i and V are the unit vectors along x and y axis Find the equation of path followed by the particle 1 1 y x 3 y 2x 2 y 4 y 1 X

A person takes T second on the stationary escalator to cover some distance The person takes 7 second in the moving escalator to cover same distance by same velocity If person is at rest on the escalator then time taken by him to cover same distance is 2 T T 1 T T 3 T T T T 2 4 T T T T T T 2

The spectral term for the atom with 70 filled subshell and only S 3 2 is a P b 4F9 2 c F 12 d P

Heat is given to a monoatomic gas which was at P V T till its pressure is double keeping volume constant after that it is again heated at constant pressure till it s volume is doubled then it s average molar specific heat for initial to final point will be 1 1 3 R 15 2 1 R 15 1

ALLEN 11 Unpolarized beam of light intensity I is incident 11 fer fru pair 41 fanfar af you a on a pair of Nichols making an angle 60 with each other The intensity of light emerging from the pair is 60 you fifteren 1 I 2 1 2 3 1 4 4 1 8 eft 1 I qf 2 1 2 3 1 4 4 1 8

65 The potential energy of a force field F is given terms of co ordinates by U x y cos x y The force acting on a particle at position given by cc ordinate 0 4 is 1 i 1 1 3 2 2 31 2 2 12 1 3 2 4 12

2 69 A bar of mass m resting on a smooth horizontal plane starts moving due to a force F mg 3 of constant magnitude In the process of its rectilinear motion the angle 9 between the direction of this force and the horizontal varies as 0 ks where k is a constant Find the velocity of the bar as a function of the angle 0 Ans 2g sine 3k

ALLEN 43 The electric field of long uniformly charged wire 43 a ya una su m f ra are an faga x na ukaffa s f 44 varies with respect to perpendicular distance r from wire Which of the following graph is correct 1 3 E 2 An insulated sphere of radius R has a uniform 44 e 1 3 2 Rulle het

A point charge Q 5 0 C is kept on the axis of a imaginary ring of radius 1 m as shown The flux of electric field through the ring due to charge Q is 3m O 1 9 x 104 Nm C 3 8 x 104 Nm C O 1 2 x 104 Nm C O 4 4 x 104 Nm C

34 Find moment of inertia of a uniform annular disc of mass 100 g having inner radius 10 cm and outer radius 20 cm about an axis passing through its centre and perpendicular to its plane 1 2 5 x10 3 kg m 3 5 x 10 kg m 2 1 5 x 10 3 kg m 4 6 x 10 3 kg m

Four persons P Q R and S are initially at the four corners of a square of side d Each person now moves with a constant speed v in such a way that P always moves directly towards Q Q towards R R towards S and S towards P The four persons will meet after time 1 2 3 2v 3d 2v

63 Two particles undergoes perfecting inelastic collision as shown in the figure The final speed of the bodies J 10 m s 2kg 1 7 m s 3 3 m s O 3kg 5 m s 2 4 m s 4 1 m s A small sphere undergoes vertical circular moti

LEADER TEST SERIES JOINT PACKAGE RANK BOOSTER COURSE EET UG 2021 04072021 Space for Rough Work 2 Decay rate for a certain mass of a radioactive substance measured at diffrent times varies with time as shown in fig countrate at t 8 hr will be Decays sec 200 150 100 50 N ALLEN 42 t hr U DA f

The horizontal component of earth s magnetic field at a place is 4 x 10 4 T and dip is 45 A metal rod of length 20 cm is placed in north south direction and is moved at constant speed of 5 cm s towards East What is e m f induced in the rod O 4 x 10 6 V O 2x 10 4 V 4 x 10 5 V 3 x 10 6 V

52 Which of following statements is TRUE 1 Any physical quantity which has magnitude and direction both must be a vector 2 A vector does not change if it is rotated through an arbitrary angle 3 Component of a vector does not depend on the orientation of the axes 4 A vector won t change if it slides parallel to itself

The figure shows a network of currents The magnitude of currents is shown here The current I will be A a 3 A Oa is correct Ob is correct Oc is correct Od is correct b 9 A 10A 6 A c 13 A 2 A d 19 A

If an aircraft travels with a speed of 325 m s in air at 25 C its Mach number will be Use Speed of sound in air at 0 C 331 m s Select one O a 0 58 b 0 87 c 0 94

A helicopter has a mass m and maintains height by imparting a downward momentum to a column of air defined by the slipstream boundary as shown in the figure The propeller blades can project a downward air speed v where the pressure in the stream below the blades is atmospheric and the radius of the circular cross section of the slip stream is r Neglect any rotational energy of the air the temperature rise due to air friction and any change in air density 1 mg C Power of engine A v for equilibrium mg mg 2r V TP B v 2 r mg p for equilibrium for equilibrium D Power of engine mg mg p for equilibrium

If the natural frequency of a string is 250 Hz the wavelength of the sound wave produced will be Use Speed of sound 340 m s Select one a 1 36 m b 2 48 m c 3 40 m