Basic Physics Questions and Answers

In an isolated parallel capacitance C the four surfaces have charges Q Q2 Q3 and Q4 as shown The potential difference between the plates is 1 2 3 Q Q Q3 Q4 2 Q Q3 2 Q Q3 2 Q Q3 Q4 71 al quay ditibul Q

Which of the given relations between the Boolean variables P and Q is NOT correct In the notation used here P denotes NOT P and Q denotes NOT Q a PO PQ P c PO P Q b PQ P Q d PQ Q P

A charged particle of mass m and charge q is released from rest in an electric field of constant magnitude E The kinetic energy of the particle after time t is 2E21 mg O E q 1 2m Eq m 21 o Eqm DI

sir i have read that gamma 1 2 f which is this formula and when to us e this one and when to use that on e what is difference Le C 3 R C 14 JR Y Note that C C R is true for any ideal gas whether mono di or polyatomic Table 13 1 summarises the theoretical predictions for specific heats of gases ignoring any vibrational modes of motion The values arr

1 A particle moving with velocity V is acted by three forces shown by the vector triangle PQR The velocity of the particle will NEET 2019 P R a Increase b Decrease e Remain constant d Change according to the smallest force QR Q

A massive weekly conducting metal cylinder with closed bottom of height h 1 m closed on top by a moving piston contains an ideal gas On top of the piston we gently put some weight The piston immediately dropped by x 2 5 cm and over a long time it was seen that the piston comes down another x 1 cm Determine the degree of freedom for the molecules of the gas Room temperature is constant gas does not leak

A boy shoves his stuffed toy zebra down a frictionless chute It starts at a height of 1 73 m above the bottom of the chute with an initial speed of 1 03 m s The toy animal emerges horizontally from the bottom of the chute and continues sliding along a horizontal surface with a coefficient of kinetic friction of 0 293 How far from the bottom of the chute does the toy zebra come to rest Assume g 9 81 m s

In Young s double slit experiment the distance between the slits is reduced to half and the distance between the slit and screen is doubled then the fringe width O Will not change O O Will become half Will be double Will become four times

mass connected to a string which is attached to a vertical post If the mass is released when the string is horizontal as shown the magnitude of the total acceleration of the mass as a function of the angle 0 is 1 g sin 0 3 g 3 cos 0 1 0 U 2 g cos 0 4 g 3 sin 0 1

25 According to C E van der Waal the interatomic potential varies with the average interatomic distance R as 1 R 1 3 RA 2 R2 4 R

SolveLancer Test The middle terms in the expansion of 4a respectively are SolveLancer Test 31 31 a C 6 27 C16 31 31 b 1 C 7 27 1 C 7 31 C15 31 14 c C 5 27 G 5 27 d 31 C16 214 31 C16 216 1 2a 3

D Heat is flowing through two cylindrical rods of the same material The diameters of the rods are in the ratio 1 2 and the lengths in the ratio 2 1 If the temperature difference between the ends is same then ratio of the rate of flow of heat through ther will be 1 2 1 3 2 8 1 A

The earth is assumed to be a sphere of radius R A platform is arranged at a height R from the surface of the earth The escape velocity of a body from this platform is fv where v is its escape velocity from the surface of the Earth The value off is 2006

2 3 Two vectors of equal magnitude inclined at some angle such that the difference in magnitude of resultant and magnitude of either of the vectors is 0 732 times either of the magnitude of vectors If the angle between them is increased by half of its initial value then the magnitude of difference of the vectors is 128 2 5P 3 3P 4 3P

Three copper plates A B C shown below are kept at very small separations If the plate A is given 2 C of charge then the charge on the outer surface of the plate C will be 1 2 C 3 0 5 C 2 1 C 4 Zero A B C

A particle starts from the origin goes along x axis to the point 10 m 0 and then returns along the same line to the point 10 m 0 The distance and displacement of the particle during the trip are 1 20 m 0 2 30 m 10 m 3 30 m 10 m 4 20 m 10 m

In which of the following cases the transistor is operating in the active region IV 1 3 2V OV OV 2V 2 2V IV OV 8 IV 2V OV 1 3 2V IV IV OV OV 2V 2 2V OV IV 2V OV

A A solid and a hollow sphere of same diameter and same material when heated for the same temperature rise will expand by the same amount R The change in volume is independent of the original mass but depends on original volume

Compute quartile deviation graphically for the following data 20 30 30 40 40 50 20 14 50 60 60 70 10 8 Marks Number of 5 Students 70 above 5

Find the mean of the marks obtained by both the groups of students taken together An assesses depreciated the machinery of his factory by 10 each in the first two years and by 40 in the third year and thereby claimed 21 average depreciation relief from taxation department bu the I T O objected and allowed only 20 Show which of the two is right

48 Kinetic Theory 21 If a moles of a monoatomic gas are mixed with 29

Scores of two golfers for 24 rounds were as follows Golfer A 74 75 78 72 77 79 78 81 76 72 72 77 74 70 78 79 80 81 74 80 75 71 73 Golfer B 86 84 80 88 89 85 86 82 82 79 86 80 82 76 86 89 87 83 80 88 86 81 81 87 Find which golfer may be considered to be more consistent player

Find arithmetic mean Draw the ogives and hence estimate the median 10 19 Class 40 49 240 32 0 9 Frequency 8 20 29 142 30 39 216 50 59 206 60 69 143 70 79 13

A uniform bar of length 6a mass 8m lies on a smooth horizontal table Two point masses m 2m moving in the same horizontal plane with speeds 2v and v respectively strike the bar as shown in the figure stick to the bar after collision 2a 2m C 2a m Sm Angular velocity of the rod about centre of mass of the system is

The square of the resultant of 4N and 3N exceeds the square of the resultant of the two forces by 12 when they are mutually perpendicular The angle between the vectors is 1 30 2 60 4 120 3 90

4 Internal energy per mole 23 The internal energy of 10 g of nitrogen at N T P is about 24 1 2575 J 3 3721 J The mean free path of a molecule of He gas is 2 2025 J 4 4051 J

2 A 20 kg cotton warp having moisture regain of 8 5 is sized with a paste of 15 concentration If a 10 add on the bone dry weight of the yarn is aimed then what should be the wet pick up How much water has to be evaporated so as to leave 8 moisture content in warp and size film Solution

31 A cylindrical rod has temperatures T and T at its ends The rate of flow of heat is Q cal s If all the linear dimensions are doubled keeping temperatures constant then rate of flow of heat Q will be 1 4Q Q 3 2 20 Q 4

9 In the figure the bigger block A has a mass of 40 kg and the upper block B is of 10 kg coefficient of friction between all surfaces of contact is 0 1 Choose the correct options Segr of string are perfectly parallel and perpendicular to the incline plane Use g 10m s 4x10x10 10 A magnitude of acceleration of B is twice of magnitude of acceleration of A 62 m s 25 C B acceleration of A is C Tension in the string is 92 8 N 124 m s 25 D acceleration of B is

potential energy at any palace we ca nnot calculate potential energy at sp ecific space So give option a I think option d is right A positive charge is moved from low potential point A to a high potential point B Then the electric potential energy Increases Decreases Will remain same 5

Two parallel conductors carrying current in the same direction attract each other while two parallel beams of electrons moving in the same irection repel each other Which of the ollowing statements cannot be the reason for his 1 The conductors are electrically neutral 2 The conductors produce magnetic fields on each other 3 The electron beams do not produce magnetic fields on each other The magnetic forces caused by the electron beams on each other are weaker than the electrostatic forces between them 8 A 1 2 Ach ch 3 4 MALTA Y GRI ala id fee

A compartment of a train is lit by 20 identical 8 bulb in series one of the bulbs fuses and is removed from the chain The remaining bulbs now light the room The light in the compartment will 1 Increases 2 Decreases 3 Neither increases nor decreases 4 None Kirchoff s voltage law in a circuit indicates 9

MCQs 1 A man of 60 kg weight is standing at rest on a platform He jumps up vertically a distance of 1 m and the platform at the same instant moves horizontally forward with the result that the man lands I meter behind the point on the platform where they took the jump the total work done by the man at the instant he lands is a 300 J b 150 J c 600 J d zero

The molar specific heat at constant pressure of an ideal gas is 7 2 R The ratio of specific heat at constant pressure to that at constant volume is 2 97 87 4 7557

4 None of the above 20 If charges moved without collisions through 20 the conductor their kinetic energy would also change so that the total energy is 1 Changed 3 Doubled 2 Unchanged 4 Halved

23 Interference fringes were produced in YDSE using light of wavelength 5000 A When a film o transparent material with 2 5 x 10 3 cm thicknes was placed over one of the slit opening th fringe pattern shifted by a distance equal 20 fringe width The refractive index of f material is 1 1 2 3 1 4 2 0 5 2 1 3 4 1 5

Q 13 Titania the largest moon of the planet Uranus has the radius of the earth and the mass of the earth What is the average density of Titania Data G 6 67 10 Nm kg R 6 38 10 m M 5 97 x 1024 kg a c 2300 kg m 2700 kg m b d 3 1900 kg m 1700 kg m A

3 How can neutrons be accelerated Give relevent and correct answer because wrong answer gives u downvote LJ

A massless string pulls a man of 50 kg upward against gravity The string would break if subjected to a tension greater than 600 N What is the maximum acceleration with which the mass can be moved upward

A small object is placed 50 cm to the left of a thin convex lens of focal length 30 cm A convex spherical mirror of radius of curvature 100 cm is placed to the right of the lens at a distance of 50 cm The mirror is tilted such that the axis of the mirror is at an angle 0 30 to the axis of the lens as shown in the figure 50 0 f 30 cm 0 0 50 cm R 100 cm 50 50 3 50 If the origin of the coordinate system is taken to be at the centre of the lens the coordinates in cm of the point x y at which the image is formed are

At the time of total solar eclipse the spectrum of solar radiation will have A B C D lines A large number of dark Fraunhofer lines A smaller number of dark Fraunhofer lines No lines at all All Fraunhofer lines changed into bright coloured

a find jerk without going into the causes of motion b find acceleration without going into the causes of motion c find velocity without going into the causes of motion

from rest and 0 A particle of mass m is follows a parabolic path as shown Assuming that the displacement of the mass from the origin is small which graph correctly depicts the position of the particle as a function of time V x x t A a o x t c 0 1 A x t b o x x t 5 for d of A fr

In the figure shown a small block of mass m 2 kg moves in fixed semicircular smooth track of radius R 2 m in vertical plane It is released from the top The normal reaction on the block in newtons at the lowest point of track is 10x find x Take g 10m s R

radius of circle in which the ring moves is 2 5 m The speed in m s of the ring is x Find x Take An ideal string ACB passes through a smooth ring of mass m 5 kg as shown in the figure The acceleration due to gravity 10m s 2 5 m A B 37 53 C 95 kg 6 PHYSICS

here what wil mass unit 21 When 1 kg of ice at 0 C melts to water at 0 C the resulting change in its entropy taking latent heat of ice to be 80 cal C is a 8 x 104 cal K b 80 cal K c 293 cal K d 273 cal K

A particle start from rest and then moves with uniform acceleration It covers x m in 1st second What is the distance travelled by it in x seconds from start 1 x m 3 x 1 m 2 1 m 4 3x m 10

During an isothermal expansion a confined ideal gas does 150 J of work against its surroundings This implies that a 300 J of heat has been added to the gas b no heat is transferred because the process is isothermal c 150 J of heat has been added to the gas d 150 J of heat has been removed from the gas

Oscillating metallic magnetic field directed perpendicular to the plane of oscillation a slows down b becomes faster c remains unaffected oscillates with changing frequency

r r A stone of mass of 16 kg is attached to a string 144 m long and is whirled in a horizontal circle The maximum tension the string can withstand is 16 Newton The maximum velocity of revolution that can be given to the stone without breaking it will be a 20 ms b 16 ms 1 c 14 ms 1 d 12 ms 1 65 66 c 10 47 degis A body of mass 18 constant velocity a 10 SCRA 1994 c 100 r J A particle comes bu it is 10 con The