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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why is the space charge region called depletion region |
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Answer» The depletion region is also called as depletion zone, depletion LAYER, space charge region, or space charge layer. The depletion region acts LIKE a wall between p-type and n-type SEMICONDUCTOR and prevents further FLOW of FREE electrons and holes. |
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| 2. |
a batrey of 6v is attached to the terminals of 3m long wirea uniform thickness and resistance of the order of 100ohm the difference of potential between two points separetd by 50cm of wire will be |
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| 3. |
Define Momentum.........No spam.... |
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Answer» ❤️❤️✌️✌️❤️✌️ ➡️Momentum is defined as the effect produced by force. ➡️It is the product of MASS and velocity. ➡️It is a vector QUANTITY which contains ➡️magnitude as well as direction. ➡️It can ALSO be defined as mass in motion. ❤️Follow me❤️ ✌️Inbox✌️ |
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| 4. |
How to divide the following numbers 3×10^8 by 1.50? |
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Answer» the ANSWER is 285714.28571 |
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| 5. |
A body is thrown with a velocity of 10 m/s at an angle of 60° with the horizontal. Its velocityat the highest point is |
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Answer» Answer: its 0 Explanation: when the body reaches at maximum height there is GRAVITATION and velocity reacting at same TIME at the maximum height .After when the OBJECT cross or passes from the maximum height it again gains velocity . eg , a football |
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| 6. |
What ia statistics friction |
Answer» ANSWERANSWER REFER TO THE ATTACHMENT |
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| 7. |
Which is the best book for physics neet for 11std |
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| 8. |
Calculate the equivalent resistance between the pointsP and Q of the network shown in the figure given below. |
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| 9. |
What is centrifugal force |
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Answer» Heya❤ A force, ARISING from the body's inertia, which APPEARS to act on a body moving in a CIRCULAR path and is directed away from the centre around which the body is moving. |
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| 10. |
What is electrostatics force |
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Answer» Answer: Coulomb force, also called electrostatic force or Coulomb INTERACTION, ATTRACTION or REPULSION of PARTICLES or OBJECTS because of their electric charge |
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| 11. |
A theory is something nobody believes, except the person who made it.An experiment is something everybody believes, except the person who made it. |
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Answer» Explanation: yes.. you may be correct but not ALWAYS.. just see in the case of big BANG theory... we have to BELIEVE on it.. because we don't have other OPTIONS.. someday this may be contradicted... but in case of experiments.. they are true and are believed by everyone... they have to believe because they are practical.. since that person have proof... so you MAY be correct.. thank you ... |
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| 12. |
Yaman of mass m is standing on a boat and pulling the body of mass m upto which force f by the pulley system normal reaction between man and bodies |
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Answer» Answer: Mass of man - m so, by the UNIVERSAL law of Gravitation.The body of mass m upto which force F by the PULLEY SYSTEM … ... pulley system normal reaction between man and bodies. |
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| 13. |
Write various type of electromagnetic radiation along with their wavelength. |
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Answer» 1) Gamma rays : below 0.01mm 2) X-rays : 0.01-1.0mm 3) Ultraviolet waves: 1.0-400mm 400-800mm 5) Infrared waves: 800-10^6mm 6) MICROWAVE: 10^6-10^10 mm 7) RADIO waves: above 10^10 mm |
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| 14. |
Write expression for position vector for uniform acceleration 1 |
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Answer»
In physics, the position, the position vector or the location vector of a body with respect to a coordinate system is defined as the vector that links the location of the body with the origin of the coordinate system. In Cartesian coordinates, it is EXPRESSED as: r→=xi→+yj→+zk→ Where: r→ : Is the position vector x, y, z : Are the coordinates of the position vector i→,j→,k→ : Are the unit VECTORS in the directions of AXES OX, OY and OZ respectively. |
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| 15. |
Two trains travelling on the same track are approaching each other with equal speed of 40 m/s. The drivers of the trains begin to decelerate simultaneously when they are just 2 km apart. If the decelerations are both uniformly an equal, then the value of deceleration to avoid the collision should be (1) 0.8 m/s (2) slightly more than 0.8 m/s2 (3) slightly less than 0.8 m/s? (4) 0.5 m/s |
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Answer» Answer: -0.8 m/sec^2 Step-by-step explanation: initial VELOCITY is 40m/s to avoid collision on same TRACK they NEED to completely stop,therefore final velocity will be zero. distance is 2km i.e. 2000m. using 3rd EQUATION of motion 2as= v^2 - u^2 2*a*2000=-1600 a=-1600/2000 a=-0.4ms^-2 now total retardation for 2 trains will be into 2. you get the answer please Mark me brainliest |
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| 16. |
Two trains are moving in the opposite directions at speeds of 43 km/h and 51 km/h respec- tively. The time taken by the slower train to cross a man sit- ting in the faster train is 9 sec- onds. What is the length (in metre) of the slower train? |
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Answer» Explanation: VELOCITY of first TRAIN- 43km /h Velocity of second train = 51km/h According to the QUESTION, When the TWO heads of each train MEETS at a common point the total speed of slow train is equal to 43+51km/h=94mk/h=26.11m/s therefore distance of slow train=speed ×time =26.11×9 =234.99metres |
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| 17. |
Two particles are moving with velocities y and v2. Their relative velocity is the maximum, when the angle between their velocities is : (a) zero (b) 1/4 (c) t/2 (d) tt |
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Answer» Answer: EXPLANATION:Vrelative=v2-v1 Now Since v2-v1 should be MAXIMUM Hence SQ root of v2square+v1square-2v1v2costheta=maxm |
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| 18. |
Two trains moving parallel to each other start from the same station. First train moves with a n acceleration of 0.5 m/s2 and gains maximum velocity of 22 m/s. After 40 s the second train starts with an acceleration of 1 m/s2 and attains a maximum velocity of 44 m/s. Find the time after which the second train catches the first train |
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Answer» PREFER to the ATTACHMENT |
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| 19. |
Two major difference between electric motor and electric generator |
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Answer» Explanation: Generator CONVERTS MECHANICAL energy to Electrical energy. ... The main DIFFERENCE between the two is that the Motor is an electric DEVICE which converts electrical energy into mechanical energy. The generator is VICE versa of that motor. It converts mechanical energy into electrical energy. |
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| 20. |
Two glasses with refractive indices of 1.5 and 1.7 are used to make two identical double convex lenses how will each of these lenses act on a ray parallel to its optical axis |
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Answer» 1/fa =(1.5 - 1)(1/R1 - 1/R2) ----(1) 1/fa =(1.5 - 1)(1/R1 - 1/R2) ----(1)1/fb =(1.7 - 1)(1/R1 - 1/R2) -----(2) 1/fa =(1.5 - 1)(1/R1 - 1/R2) ----(1)1/fb =(1.7 - 1)(1/R1 - 1/R2) -----(2)On DIVIDING EQ(2) by EQ {1) we get, fa/fb = 7/5 |
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| 21. |
Two trains a and b each of length 400 m are moving on two parallel tracks in the same direction (with a ahead ofb.With the same speed of 72 km/h, the driver of b decides to overtake a and accelerates by 1 m/s. After 50 s, the driver of b and the guard of a are in the same line. What is the original distance between a and b? (1) 750 m (2) 1000 m (3) 1250 m (4) 2250 m |
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Answer» Initial velocity, u = 72 km/h = 20 m/s Initial velocity, u = 72 km/h = 20 m/sTime, t = 50aI = 0 (Since it is movicity) city)From second equation of MOTION, distance (sI)covered by train A can be obtained as: city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2 city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 m city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 mFor train B: city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 mFor train B:Initial velocity, u = 72 km/h = 20 m/s city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 mFor train B:Initial velocity, u = 72 km/h = 20 m/sAcceleration, a = 1 m/s2 city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 mFor train B:Initial velocity, u = 72 km/h = 20 m/sAcceleration, a = 1 m/s2Time, t = 50 s city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 mFor train B:Initial velocity, u = 72 km/h = 20 m/sAcceleration, a = 1 m/s2Time, t = 50 sFrom second equation of motion, distance (sII) covered by train A can be obtained as: city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 mFor train B:Initial velocity, u = 72 km/h = 20 m/sAcceleration, a = 1 m/s2Time, t = 50 sFrom second equation of motion, distance (sII) covered by train A can be obtained as:sII = ut + (1/2)at2 city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 mFor train B:Initial velocity, u = 72 km/h = 20 m/sAcceleration, a = 1 m/s2Time, t = 50 sFrom second equation of motion, distance (sII) covered by train A can be obtained as:sII = ut + (1/2)at2= 20 X 50 + (1/2) × 1 × (50)2 = 2250 m city)From second equation of motion, distance (sI)covered by train A can be obtained as:s = ut + (1/2)a1t2= 20 × 50 + 0 = 1000 mFor train B:Initial velocity, u = 72 km/h = 20 m/sAcceleration, a = 1 m/s2Time, t = 50 sFrom second equation of motion, distance (sII) covered by train A can be obtained as:sII = ut + (1/2)at2= 20 X 50 + (1/2) × 1 × (50)2 = 2250 mLength of both trains = 2 × 400 m = 800 m |
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| 22. |
Two forces of magnitude a neat and clean nitin respectively at. If the resultant force is 17 newton the angle between the forces has to be |
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Answer» Explanation: By applying formula F = a²+b²+2abcosθ Solution 17²= 8²+15²+2.8.15.cosθ 17²= 8²+15²+2.8.15.cosθ289= 64+ 225+ 240cosθ 17²= 8²+15²+2.8.15.cosθ289= 64+ 225+ 240cosθ240cosθ= 0 17²= 8²+15²+2.8.15.cosθ289= 64+ 225+ 240cosθ240cosθ= 0cosθ= 0 17²= 8²+15²+2.8.15.cosθ289= 64+ 225+ 240cosθ240cosθ= 0cosθ= 0θ= 90° |
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| 23. |
Two mutually perpendicular simple harmonic vibrations have same |
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Answer» Answer: TWO mutually PERPENDICULAR simple harmonic vibrations have same amplitude, frequency and PHASE. When they SUPERIMPOSE the resultant form of vibration |
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| 24. |
Two buses starts simultaneously from town a and b which are 480km apart from each other. If one bus takes 8h from a to b while other take 12h from b toa.Find when they meet each other and where |
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Answer» They will MEET up at 266.40 km. See the ATTACHMENT |
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| 25. |
Two litre of an ideal gas at a pressure of 10 atm expands isothermaly reversible until its volume is 10 litres.How much heat is absorbed |
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Answer» Explanation: 2 litres of an ideal gas : V1 = 2 litres 2 litres of an ideal gas : V1 = 2 litresP1 = 10 atms 2 litres of an ideal gas : V1 = 2 litresP1 = 10 atmsT = constant 2 litres of an ideal gas : V1 = 2 litresP1 = 10 atmsT = constantV2 = 10 litres 2 litres of an ideal gas : V1 = 2 litresP1 = 10 atmsT = constantV2 = 10 litres => P2 = P1 V1 / V2 = 2 atm |
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| 26. |
Vector a points north east and its magnitude is 3 kg metre per second it is multiplied by the scalar alphastar that alpha equals to minus 4 seconds find the direction and magnitude of the new vector quantity does it represent the same physical quantity or not |
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Answer» Explanation: Here in this CASE DIRECTION becomes OPPOSITE. So the vector is directed SOUTH west. Direction becomes opposite. So the vector is directed South west. A physical quantity REMAINS the same physical quantity when multiplied by a scalar. |
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| 27. |
Two friends a and b each having mass 40 kg are playing with a ball of mass 5kg, on a frictionaless surface a throws the ball towards b with speed of 4m/s. Then the speed of a and b after b catches the ball fir the first time are |
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Answer» Explanation: In the case 1 TOTAL momentum of the man A and the BALL will remain constant Therefore , 0 = 4 x 5 - 40 x v Velocity will be = 0.5 m/s TOWARDS left . |
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| 28. |
Two trains 200 meters and 175 meters long are running on parallel rails at the speed of 90 and 60 kms per hour respectively.How long will they take to cross each other if they are running same directiom |
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Answer» TOTAL LENGTH of the TRAINS = 200+175=375m Relative SPEED= (90+60)=150km/s |
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| 29. |
The work function of a metal is 4.2ev,the threshold wavelength will be? |
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Answer» ...BRO .. . |
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| 30. |
The time required to liberate one gram equivalent of an element by passing one ampere current through its solution is ? |
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Answer» Explanation: THUS the TIME required to LIBERATE one gram EQUIVALENT of an element by passing one ampere current through its solution is 26.8 hours. |
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| 31. |
Three resistances of 30w,15w and 5w are connected in parallel,their combined resistance will be |
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Answer» Explanation: Their total resistance = 15W. Now it is in parallel with 5W resistor, so total resistance, 15 R 1=1 5 + 15 1 = 13 .HOPE this WOULD be HELPFUL to you. |
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| 32. |
The motion of a particle along a straight line is described by the equation x 8+121-1 where x is in metre and t in second. What is the retardation of the particle when its velocity becomes zero? (1) 24 m/s (2) zero (3) 6 m/s (4) 12 m/s |
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| 33. |
The function of catalytic converter is used to control emission of |
Answer» #FOLLOW me and THANKS my ANSWERS as |
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| 34. |
The displacement of a body varies with time as x = -2/3 t square+16t +2 how long.Does the body take.To.Come.To rest |
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| 35. |
36कम/ह चाल रही कार 1second mein कितनी दूरी तय करेगी |
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| 36. |
The force exerted by flowing water on the sediment particulars to causes their motion is called |
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Answer» Answer: #HEY here is your answerThe force EXERTED by flowing WATER on the SEDIMENT particulars to causes their motion is called Tractive force. |
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| 37. |
The resistance of materials which increase with temperature is |
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Answer» ANSWER: TEMPERATURE co-efficient Explanation: |
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| 38. |
The displacement of a particle in simple harmonic motion in one time period is |
Answer» Simple HARMONIC MOTION#FOLLOW me |
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| 39. |
The frequency of sound wave is n and its velocity is v if the velocity is increased to 4n the velocity of wave will be |
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Answer» Increases If velocity is INCREASING |
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| 40. |
The displacement of a particle is given by y a+bt ct-d. The initial velocity and acceleration are respectively walks (1) b,-4d (2)-b, 2c (9) b, 2c (4) 2c, |
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Answer» Answer: can you plse give the CORRECT details of the QUESTION about the EQUATION of displacement but if the question had been the one in the attachment then OPTION C is correct |
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| 41. |
Why is despersal of seed necessary for growth of plant |
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Answer» Answer: this is important because if the SEEDS are not DISPERSED, MANY germinating SEEDLINGS will grow very close to the parent plant. |
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| 42. |
The centripetal force in a circular motion is depending upon mass velocity and radius of a circle find out the formula of centripetal force |
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Answer» CENTRIPETAL FORCE =mv^2÷r |
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| 43. |
Starting with an initial velocity 30m/s and moving with uniform acceleration the train passes two stations 1.2km at the first minute and second minute calculate the acceleration |
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Answer»
sorry i am busy in collecting POINTS so TRY some ONE else dude. Explanation:
sorry i am busy in collecting points so try some one else dude. |
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| 44. |
Potential gradient at which the dielectric of a condenser just get punctured is called |
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Answer» heyyy......... Potential GRADIENT at which the DIELECTRIC of a CONDENSER just get PUNCTURED is called dielectric strength. hope it HELPS............ |
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| 45. |
Keeping the length of conductor constant if the radius of the conductor is doubled then its resistance becomes |
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Answer» Answer: resitance GETS one FOURTH of its original value Explanation: because RESISTANCE is inversly propotional to radius |
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| 46. |
Name the unit ised to measure electric energy in an electric meter |
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Answer» heyyy MATE....... unit used to measure electric ENERGY in an electric meter is kilowatt hour (KWH).
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| 47. |
Is the space between the matter influence the speed of diffusion? |
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Answer» heyyy........ yes,space between the particles INFLUENCE the SPEED of diffusion. speed of diffusion is DIRECTLY proportional to spaces between the particles |
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| 48. |
The acceleration 'a' in m/s of a particle is given by a = 3 +21 + 2 where is the time. If the particle starts out with a velocity 2 m/s at t 0, then the velocity at me end of 2 second is (1) 12 m/s (2) 18 m/s (3) 27 m/s (4) 36 m/s |
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Answer» hi good NIGHT out with a few minutes to any other WAY around the world |
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| 49. |
Ray of light is incident on the surface of separation of a medium at an angle 45 and is refracted in the medium at an angle 30. What will be the velocity of light in the medium? |
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Answer» R. index=sin45/sin30=√2 velocity=√2×3×10^8 m/s |
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