POLYCET Model Papers 2024 | physical science | POLYCET 2024 Tips and Tricks | Part-1

[Music] 50 plus 40 plus 30 120 questions okay now first question until physical science law uh sorry chemistry [Music] which among the following behaves like heat store of house for the Earth is [Music] foreign a key to Biko three on the surface of a cold soft drink bottle kept in here is due to Mariah [Music] water vapor is next question the heat energy supplied to a system during melting is known as melting derogative melting anti-astly solid statement liquidity gas yesterday either temperatures next the device used to measure the specific heat of your substance work a substance your specific heat is 10th class law next if i and r are the angle of incidence and refraction respectively then IE is less than or equal means the light Ray travels from either foreign [Music] [Music] alternative [Music] is is passing from denser medium to rarer medium next question the physical quantity which has no units units any physical quantity and the radius of curvature centimeter unit 2 focal length length of the centimeters velocity and a meter per second centimeter per second refractive index units next question a rectangular tank of depth 2 meters is full of water tank than in the world by three when viewed from the top the bottom of the tank seems at a depth of a tank foreign [Music] finally [Music] together foreign [Music] [Music] [Music] 0.5 meters okay next when we sit at a campfire here objects foreign [Music] foreign foreign and refractive index of that Medium respectively then speed data BNT refractive index speed refractive index is low foreign foreign next the symbol used to draw the ray diagram indicates e symbol entered a convex lens convex lens symbolism [Music] concave lens okay next if Y and Y by 4 are the object and image distances due to a convex lens respectively then it's a focal length is 1 by f is equal to 1 by V minus 1 by U H 1 by V and the y by 4. minus 1 by u n minus y uni minus 4 by y plus 1 by y why any LCM one by f is equal to 5 by y f is equal to Y by 5. f is equal to Y by Phi 1A answer next a lens bounded by two spherical surfaces curved inwards curved inwards is the answer okay now 67th question which among the following pairs represent optically transparent and effective media lightning more transparent medium lightning tanakunda hello Water Ice rindu transparently foreign [Music] lens makers formulas repeated question 1 by f is equal to n minus 1 into 1 by R1 minus 1 by R2 clear the choose petal a equal to F is equal to F is equal to answer one by f 1 by f is equal to n minus 1 into 1 by R 1 minus 1 by R 2 in the case of myofic defects images [Music] [Music] next question the part of the human eye which helps the islands to change its focal length is called length is foreign [Music] by p and teacher do 2.5 numerator denominator 100 into 10 by 2.5 into 10 25 4 0 4 into 10 40 cm answer next the bifocal lenses okay next question foreign [Music] [Music] foreign [Music] [Music] foreign uh refractive index refractive index increases from Violet to Red the Navy wrong refractive index right to only a true the formation of the rainbow is due to the dispersion of sunlight by the rainbow energy water droplets answer to next i1 i21 is the entangle of incidence and emergence respectively a is the angle of prism then the angle of deviation is given by me correlation till Sunday I 1 plus I2 is equal to a plus d i 1 and T angle of incidence I2 angle of emergence angle of prism angle of deviation i1 plus I 2 minus a adiya answer next ampere second then I is equal to Q by t and a formula qantage ampere is equal to coulomb by second [Music] ampere into second carbon ampere into second another are the answer is electric charge unit foreign [Music] volts the resistance of the bulb [Music] 240 into 240 by 100 576 [Music] ohms 576 ohms p is equal to V Square by R but resistance V Square by p v and voltage 240 into 240 by P and a power 100 Sno zero zero State 24 into 24 576 ohms next electric fuse is used in household circuits for the purpose of in the current defuse electrical appliances multiple [Music] okay four resistors each of two ohms are connected in the form of four sides of a parallelogram then the equivalent resistance between any two opposite corners resistance so resistance 2 ohms 2 ohms 2 ohms between any two opposite Corners either is four R1 is equal to 4 Ohms series A4 foreign [Music] next resistance of a wire of length 0.5 meter area of cross section one millimeter square is one ohm the resistivity there is foreign [Music] [Music] Square okay by length and featured on zero point five into one by two two into ten power minus six two into ten power minus six resistivity ohm meter unit ohm into meter next question the area of current time graph is the electric charges cross multiplication is Q is equal to i t count answer electric charge next true two resistors 3 ohm and 2 ohm are connected in series and a potential difference of 5 volts is applied after them the potential difference across 2 ohm resistor is we need diagram is 3 ohm resistor foreign [Music] [Music] [Music] foreign portal resistance 5 ohms total voltage 5 volts after total current and I is equal to V by rather than in G entle Phi by R and F5 is there one ampere rho and take one ampere current to first to resistor long inches foreign [Music] foreign next pick the correct answer from the following two statements [Music] another form of law of conservation of charges another form of law of conservation of energy statements are three next the electric power in kilowatt hour consumed in opening operating 60 watts ball for three hours a day in a month of 30 days is the question of formula kilowatt hours what age into number into hours into days any days by thousand s gravity 60 number 90 um three hours and 5.4 kilowatt hours next on increasing the temperature the resistance of copper and germanium temperatures [Music] I mean semiconductory semicondary the resistance temperatures conductor silicon germanium semiconductors one three volt into four coulomb 3 volt into four coulombs three into four twelve foreign [Music] [Music] [Music] [Music] next three resistors one ohm 0.1 ohm 0.001 ohm are connected in series they are equivalent resistance foreign [Music] [Music] next question the scientist who proposed that the metallic conductors contain large number of free electrons Metals low free electrons foreign thank you

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Length: 34min 20sec (2060 seconds)

Published: Fri Apr 28 2023