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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. |
Fill these blanksit is very important so give answer Immediatelyif you give answer you will be mark brainlist |
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Answer» a. Backward Direction b. Will not move c. FORWARD Direction |
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| 2. |
A simple pendulum of the length 1 m has the mass 10g and oscillates freely with amplitude of 5 cm . calculate its potential energy at extreme postion |
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Answer» time PERIOD of SIMPLE pendulum is given by, T = 2π√{l/g} we ALSO know, angular velocity (\omegaω ) is given by, \omega=\frac{2\pi}{T}ω= T 2π
or, T=\frac{2\pi}{\omega}T= ω 2π
so, time period can be changed into angular velocity , \omega=\sqrt{\frac{g}{l}}ω= l g
given, g = 10m/s² , l = 1m so, \omega=\sqrt{10}ω= 10
rad/s know, potential ENERGY at extreme position, U = \frac{1}{2}m\omega^2A^2 2 1
mω 2 A 2
given, m = 10g = 10^-2 kg, A = 2cm = 2 × 10^-2 so, U = 1/2 × 10^-2 × (√10)² × (2 × 10^-2)² = 1/2 × 10^-2 × 10 × 4 × 10^-4 J = 20 × 10^-6 J = 2 × 10^-5 J hence, answer is 2 × 10^-5 J |
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15. Heat engine is a device which converts heat energy into mechanical energy,(a) Name the processes in a Carnot's cycle.(b) Can you design an engine of 100% efficiency? Justify your answer. |
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Answer» I don't KNOW what to answer I didn't UNDERSTAND the QUESTION |
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In rotational motion of a rigid body , all particles move with ... |
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Answer» Answer: In rotational motion of a rigid body, all particles move with different linear velocities and same angular velocities.hope it helps!!! please mark me as a brainlist. |
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| 5. |
The 17th term of an AP exceeds in 10th term by 7. FIND the common difference. |
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Answer» Let the first term and the common DIFFERENCE of the AP be a and b respectively. According to the QUESTION, a₁₇ = a₁₀ + 7 a + (17 – 1) d = a + (10 – 1) d + 7 ∵ aₙ = a + ( n – 1) d 16 d – 9 d = 7 7 d = 7 Hence, the common difference is 1 . |
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| 6. |
Name any 2 constellation |
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Answer» Answer: Orion and the Ursa major CONSTELLATION hope it will HELP u plz MARK me as BRAINLIEST. |
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| 7. |
In a Tangent Galvanometer a current 1 ampere produces deflection of 30 degree the current required to produce a deflection of 60° is |
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Answer» Answer: 2 AMPERE CURRENT REQUIRED to PRODUCE a DEFLECTION of 60° |
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| 8. |
How does static electricity work Guys please help me |
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Answer» Answer: Static electricity is the result of an imbalance between negative and positive CHARGES in an object. These charges can build up on the surface of an object until they FIND a way to be RELEASED or discharged. One way to discharge them is through a CIRCUIT. ... The electrons cling to your body until they can be released. |
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| 9. |
In a tangent galvanometer a current 1 A produces deflection of 30° the current requiredproduce a deflection of 60° is |
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Answer» hajsjs shshjskamans s DJ |
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| 10. |
AboveThe graph of parabolais either completlythe x-axis or completelybelow the x-axis if |
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Answer» THANK YOU |
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| 11. |
Single Select Choice - Weekly Test Eamcet PhysicsQ. 4Coefficient of volume expansion of a vessel is greater then the liqui1)falls2)fist rises and then falls3)remains same4)rises |
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Answer» Answer: the coefficient of volume expansion of a VESSEL GRATER then LIQUID first RISES and then falls |
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| 12. |
A body moving along a circular path covers a distance of 3 m in 1 s uniformly , such that the body returns to its starting point . a) Is the body moving with uniform speed ? Explain . b) Is the body moving with uniform velocity ? Explain . |
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Answer» Answer: speed is DISTANCE /TIME so speed is CONSTANT that is uniform....but velocity deals with direction and each POINT the velocity is tangential therefore direction changes so non uniform velocity |
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| 13. |
ExampleA car traveled the first third of distance S at speed of 10 ms. the second third at a specof 20 m s' and last third at a speed of 60 m s'. Determine average speed of car. |
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Answer» jfjfjdjjdjdjdnbdhdmkfhfmdhdjdhdjdjdhhfhfjjf |
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| 14. |
a 70 kg man runs up the stairs in 4.9 sec . the height of stairs is 5 meters . he will consume power equal to |
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Answer» <P>Answer:357 watt Explanation: P(power)=F(FORCE) X v(VELOCITY) P=70x5 (as F=ma) x 5/4.9(as v=s/t) P=350x1.02 P=357 W or Watt Hope, it helps
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| 15. |
A body has a mass of 200g and volume is 45 cm^3. What is its density? |
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Answer» density= 4.4 g/cm³ Explanation: mass=200 g VOLUME= 45 cm³ Density = mass/ volume = 200/45 = 4.4 g/cm³ (in g/cm³) = 4400 kg/m³ (in kg/m³)
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| 16. |
The resultant of two forces 10N and 15 N acting along +X- axis and -x axis respectively is(A) 25 N along +X - axis (B) 25 N along -X- axis(C) 5 N along + x-axis (D) 5 N along -X- axis |
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Answer» Answer: The RESULTANT of two forces 10N and 15 N acting along +X- axis and -x axis RESPECTIVELY is (A) 25 N along +X - axis (B) 25 N along -X- axis (C) 5 N along + x-axis (D) 5 N along -X- axis |
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| 17. |
Motion of the mango falling from a tree is |
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Answer» rectilinear MOTION of the mango falling from a tree. hope it is USEFUL. |
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| 18. |
When an atom undergoes radioactivity decay the energy released is due to ___,give one word for this (the letter must contain 11 alphabets and last alphabet must be 'R') |
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Answer» Answer: Answer: ALPHA and beta DECAY eject charged particles from the nucleus, ALTERING its charge and its interactions with electrons, which in turn ALTER the electronic energy levels. |
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| 19. |
A solenoid is 2.7 m long, has a radius 0.85 cm and has 600 turns. It carries a current i of 2.5 A. The magnitude of the magnetic field B inside the solenoid and far from the either end is |
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Answer» Explanation: ANSWER Here, I=4A l=0.6m, r=0.02m ∵ r l
= 30 i.e. l >> r n= 0.6 600
=1000 turns/m, Hence, we can use LONG solenoid formula, then ∴ B=μ 0
nI=4π x 10 −7 x 10 x 4 = 50.24 x 10 −4 = 5.024 x 10 3 T Answer By |
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| 20. |
The magnetic field lines are?TriangularCurvedClosed curvesStraight |
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| 21. |
Does gravity leads to non-uniform motion only in real? |
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| 22. |
La biblia habla del mundo y la creación del mundo ¿podemos aplicar a este mundo lo que los presocráticos, Platón, Aristóteles, pensaron del cosmo? |
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Answer» what Explanation: ASK innengkish bjjddxvmyou |
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| 23. |
if a body is dropped in an elevator, and that elevator is moving upward with a constant velocity "v". find the time taken by body to reach the floor of elevator. |
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Answer» Answer: PLEASE MARK me as brainliest and FOLLOW me for more answers LIKE this |
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| 24. |
What is fluids? Give to example of fluids |
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Answer» Answer: The substances that can flow is CALLED as Fluids Ex:- GASES(OXYGEN,hydrogen) , Liquids(water, PETROL).... HOPE this answer is helpful |
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| 25. |
Several businessmen in Indiaearn millions. (change into pastperfect tense)1. Several businessmen in India had earned millions.2. Several businessmen in India have earned millions. |
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Answer» Answer: SEVERAL BUSINESSMEN in INDIA has EARNED millions. |
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| 26. |
a particle is projected upward from point A on the ground at time t1 it croses a point B and continue to move upward. it takes further time t2 to reach the ground. find maximum height reach by particle |
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| 27. |
A boy moved 8 m away from a mirror and stop near a wall which is half the distance he moved from the mirror. Find the image distance nature and size of the image also find the position of object and image. |
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Answer» आई होप यू लाइक माय आंसर |
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| 28. |
two mutually perpendicular forces of 8n &6n acts on the same body of mass 10kg find (a) net force acting on the body (b) magnitude of acceleration of body? |
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Answer» SEE the above explanation. |
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| 29. |
Which physical quantityhave unit Newton / coulomb |
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Answer» length The SI UNIT for length is the meter (ABBREVIATED m); its definition has also changed over time to BECOME more accurate and precise. The meter was first defined in 1791 as 1/10,000,000 of the distance from the equator to the NORTH Pole. |
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How we derive the formula in physics. don't see in the Google |
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Answer» Answer: To derive a mathematical formula, you RELY on AXIOMS, LOGIC, and other results that have been PROVEN through some combination of axioms and logic. To derive a formula means to deduce, obtain, or prove the formula from a SET of already-known or already-established principles or observations follow me |
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| 31. |
The degree of hotness and colldness of an object |
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Answer» It is MEASURED by THERMOMETER |
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| 32. |
2x State the differences between convex and concave mirrors? (AS)3 Distinguish between real and virtual images. (AS) |
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Answer» difference between concave and concave mirror are: concave: A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex or concave. Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices. convex: A convex mirror or diverging mirror is a curved mirror in which the reflective surface bulges towards the light source. Convex mirrors reflect light outwards, therefore they are not used to focus light. ... The image is SMALLER than the OBJECT, but GETS larger as the object approaches the mirror. difference between real and virtual images: real image: A real image occurs where rays converge, whereas a virtual image occurs where rays only appear to diverge. Real images can be produced by concave mirrors and converging lenses, only if the object is placed further away from the mirror/lens than the focal point, and this real image is inverted. virtual image: in optics, an image is defined as the collection of focus points of light rays coming from an object. A real image is the collection of focus points actually made by converging rays, while a virtual image is the collection of focus points made by extensions of diverging rays. if you are really satisfied then mark me as a BRAINLIEST PLEASE........ |
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| 33. |
Show that if the force acting on a particle is zero ,it's momentum will remain unchanged |
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Answer» Answer: see the formulae for MOMENTUM is .......p =mv.....so the MASS ALWAYS REMAIN constant.......and if the FORCE is not applied then it's velocity will not change.....hence the momentum will remain vonstant |
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| 34. |
in how much time an object having mass of 1000 kg will speed up from 10 m/s to 50 m/s, if 5000 N force will be applied over it. |
Answer» Time taken to speed up from 10 m/s to 50 m/s is 8 seconds.Explanation Given that mass of object (m) = 1000 kg, initial speed (u) = 10 m/s, final speed (v) = 50 m/s, Force applied (F) = 5000 N We have to find time taken by object to speed up at that speed. Solution At first USING NEWTON's 2nd LAW :- → Force = Mass * Acceleration → 5000 = 1000 * Acceleration → Acceleration = 5000/1000 → Acceleration = 5 m/s² Now using 1st equation of motion : → v = u + at → 50 = 10 + 5t → 50 - 10 = 5t → 40 = 5t → t = 40/5 → t = 8 s Therefore, time taken by object to speed up to 50 m/s is 8 seconds. |
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| 35. |
Magnetic force acting on the charged particle projected perpendicular to magnetic field isproportional to y, where v is the speed. Find n. |
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Answer» N = 1 hope it HELPS you...
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| 36. |
two resistance R1=(100+-3)ohm R2=(150+-2)ohm are connected in series .what is the absolute error of equivalent resistance? ? |
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Answer» EQUIVALENT RESISTANCE is (250+-5)ohm Explanation: Equivalent resistance=R1 + R2 = 100+150=250 DeltaR equivalent = deltaR1 + deltaR2 = 3+2=5 Equivalent resistance =(250+-5)ohm Hope it HELPS |
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| 37. |
استمال ورود معلماتwitha particle of chargesubjectedmagnetic feldperpendicular to ite velocityshow that it describes acircular path. Write theexpressionfor its radius |
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| 39. |
List some characteristics of plane mirror. |
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Answer» Answer:
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| 40. |
Explain the principle of virtual work |
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Answer» HEY mate, here is your answer.. The principle of virtual work states that in equilibrium the virtual work of the forces applied to a SYSTEM is zero. Newton's laws STATE that at equilibrium the applied forces are equal and opposite to the reaction, or constraint forces. This means the virtual work of the constraint forces must be zero as well. hope it helps u frnd ! |
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A light of wavelength 352 nm with an intensity 2.00 W/m2 is directed at a metallic surface.Only 0.60% of incident photons will produce photoelectrons. Calculate the number ofphotoelectrons emitted per second if the metallic surface has area of 2.00 cm?h (a) 4.26x10^4 photoelectron/s(b) 7.09x105'4 photoelectron/s(c) 7.09x104 photoelectron/s(d) 4.26x102 photoelectron/s |
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Answer» Answer: Explanation: esults (22) A particle is fired with velocity u making angle (theta) with the horizontal.what is the change in velocity when it is at the highest point? See answers (2) 2.9 54 votes 37 A particle is fired with velocity u making angle with horizontal.what is change of speed See answers (2) 1.0 1 vote 0 A particle is fired with velocity u making angle with horizontal.what is change of speed See answers (2) 3.5 2 votes 4 a particle is fired with velocity v making /theta angle with horizontal.what is the change in speed See answers (1) 1.0 1 vote 1 A projectile is fired with a velocity u at RIGHT angle to the plane, which is inclined at angle o with the horizontal.what is the horizontal displacement See answers (1) 1.0 1 vote 3 a boy throws a ball of mass 200g with a velocity 20 m/s at an angle of 40degree with the horizontal.what is the kinetic energy of the ball at the highest point ... See answers (1) 4.2 45 votes 46 .,............A boy throws a ball of mass 200g with a velocity 20m/s with the horizontal.What is the kinetic energy of the ball at the highest point? See answers (2) 3.7 3 votes 1 A ball is projected with a velocity of 10 m/s at an angle of 30 degrees with the horizontal.what will be the speed of the ball after 1 sec. See answers (2) 5.0 2 votes 2 A ball having TOTAL kinetic energy E is projected at an angle of 45°with the horizontal.what will be its kinetic energy at highest point of projection See answers (1) 0.0 0 votes 0 A stray bullet travelling initially at 4m/s breaks into two pieces and moves off at different velocities u and v respectively at 30° and 60° with respect to the... See answers (1) 0.0 0 votes 0 1 2 3 If you still can't find what you're looking for, ask a NEW question a particle is fired with the velocity u making angle theta with the horizontal.what is the change in velocity when it is at the highest point ASK YOUR QUESTION Darmaidayxx found this answer helpful THANKS 0 5.0 (1 vote) Add comment The Brain The BrainAnswerer Can't find what you're looking for? ASK YOUR QUESTION Log 21.08.2020 11:03 afhamsaleem answered the question 11:01 anuruddh92 asked a question Previous Next afhamsaleem afhamsaleem Rank: Virtuoso 1236/1000 5/10 Your influence 3 Answering Streak Your Streak is on! Answer another question tomorrow and keep it going. Fun fact An apple, potato, and onion all taste the same if you eat them with your nose plugged 1 Fun fact Bananas are curved because they grow towards the sun ☀️ 2 Fun fact During your lifetime, you will produce enough saliva to fill two SWIMMING pools ♀️ 3 4 4 Get +8 bonus 4 Last 7 days Overall Your stats from the last 7 days compared with the previous 7 days Popularity 110 People learning from your answers. +74% Brainliest 1 This many users said your answers were the best! -75% Thanks 22 Your effort is appreciated! -19% Questions answered 8 -68% 15 Aug - 21 Aug 0 Sat 0 Sun 0 Mon 0 Tue 2 Wed 4 Thu 2 Fri Physics 5 Math 3 My challenges Answer 25 Math questions in 48 hours to collect 400 points 3/25 8h : 42m Answer 5 questions from any subject in 48 hours to collect 50 points 0/5 TRY IT AGAIN! You may attempt only one challenge at a time. Challenges to complete Answer 10 questions from any subject in 48 hours to collect 100 points 0/10 2d : 00h START You may attempt only one challenge at a time. Answer 25 questions from any subject in 48 hours to collect 400 points 0/25 |
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9. A saucepan is used to heatup some water. How is heattransferred through thealuminum pan and through theplastic handle? |
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Answer» Answer: When energy is transferred to an object, the energy of the particles increases. This means the particles have more kinetic energy and they start to move and vibrate faster. As the particles are moving faster they "bump" into other particles and TRANSFER some of their energy to those neighbouring particles. In this way, the energy is transferred through the substance to the other end. This process is called CONDUCTION. Explanation: Have you noticed that when you put a COLD, metal teaspoon into your hot cup of TEA, the teaspoon handle also warms up after a while? Have you ever WONDERED how this warmth "moved" from the hot tea to the cold teaspoon and warmed it up? This is one way in which energy is transferred and this is called conduction. |
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The resistance of a conductor is twice that of If the potential difference between the two ends of a conductor is equal to the resistance of a conductor, what is the ratio of the amount of current flowing between them ? |
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Answer» Answer: Resistivity Summary The resistance of a CONDUCTOR is directly proportional to its length (L) as R ∝ L. ... For EXAMPLE, the resistivity of copper is generally given as: 1.72 x 10-8 Ωm. The resistivity of a particular MATERIAL is measured in units of Ohm-Metres (Ωm) which is also affect by temperature |
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| 44. |
Calculate the amount of charge that would flow in one hour through the element of an electric iron drawing a current of 0.4 amps. |
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Answer» OK but can you TELL me how to MARK as brainliest Explanation: if you tell me then i will mark them as BRAINLIST |
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| 45. |
Unit of rydberg's constant ??? m^-1 or ev?? plzz help me i will mark u as a brainlists.. |
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Answer» Answer: I think it's m^1 because it's UNIT COMES in METER per sec Explanation: I hope it HELPS you |
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A force that appears between elementary particles in a nuclear process is |
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ill make you brainliest if you answer this question correctly with step by step solution .) Convert 80 km/hr to ft/s. |
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Answer» 72.9076 is you answer DEAR |
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| 48. |
একটি বস্তুকণার সরণ (৫) ও সময় (৫) নিম্নলিখিতভাবে সম্পর্কযুক্ত:x = at + bt2 – ct3; যেখানে a, b, c ধুবক। যখন কণার ত্বরণ শূন্য হয়,তখন কণার বেগ হবেh2A a +(B)b22cG+© a +b2b23cD a +C4c |
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| 49. |
a body completes one round of circle of radius r in 20seconds then displacement of body after 45 seconds is |
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| 50. |
The constant of proportionality "K" depend upon:System of units? |
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Answer» Explanation: Unsourced material may be challenged and removed. The Coulomb constant, the electric force constant, or the electrostatic constant (DENOTED ke, k or K) is a proportionality constant in ELECTROSTATICS equations. In SI UNITS it is EQUAL to 8.9875517923(14)×109 kg⋅m3⋅s−2⋅C−2. mark as brainliest. plz follow me.. |
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