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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. |
Physics ncert solutions ch 3 class 12 |
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Answer» ........................................................... |
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| 2. |
What do u understand by interaction of forces |
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Answer» tion:Interaction involves two objects.In Interaction each OBJECT act in such a way as to have an effect on the other object. Interaction of one object with ANOTHER object results in force between two objects. ... During this interaction force arises which ACTS on the car and makes it move in the direction of APPLIED force. |
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| 3. |
What happens to a balloon when filled with air |
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Answer» hy dude UR ANSWER is Explanation:The stronger OUTSIDE air pressure compresses the BALLOON. As the balloon VOLUME decreases, pressure inside the balloon increases. ... You end up with a balloon filled with cold high density air. If you warm air it will expand and density will decrease until the pressure inside and outside the parcel are equal.Hope it helps u |
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| 4. |
How can you get a half of water molecule |
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Answer» tion:Well after you have GOTTEN a MOLECULE of WATER, simply divide it by two. Once again FUNNY. Just like asking how do you GET half of 10 or half of an element. |
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| 5. |
Find the focal length of a convex mirror whose radius of curvature is 32 |
| Answer» TION:RADIUS of CURVATURE,R = 32 cmRadius of curvature = 2 X Focal length (f)=> R = 2f=> f = R/2=> f = 32/2=> f = 16CM | |
| 6. |
What is the device used to measure resistor |
| Answer» MICRO OHM METER is USED to MEASURE resistance | |
| 7. |
Mass is analogous with a) M L –2 b) M/L-2 c) M2 L d) M-2 L |
| Answer» EXPLANATION:MASS is ANALOGOUS to MOMENT Of InertiaSI UNIT= kgm² | |
| 8. |
Magnification 4.5 is less then 1 |
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Answer» no this is more than ONE |
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| 9. |
2. If two pieces of solid cubes each of same size repel each other then1) One of them is a magnet2) both of them are magnets3) One of them is a magnetic substance4) Both are non magnetic substance |
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Answer» Both are MAGNETS.Explanation:Since when magnets with same POLES are KEPT with each other they repel.HOPE IT HELPS YOU!!!!PLEASE MAKE IT BRAINLIEST ANSWER!!!! |
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| 10. |
If a person weight 750N on earth,how much would be his weight be his on the Moon given that moon's mass is 1/8 of that of the earth and it's radius is 1/3.7 of that of the earth? |
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Answer» 125NExplanation: |
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| 11. |
Photoelectric effect is based on the law of conservation of (a) energy (b) mass (c) linear momentum (d) angular momentum |
| Answer» TION:I THINK OPTION C or d NNN | |
| 12. |
The mutual electrostatic force of attraction between two small sphere carrying charges 0.4 micro coulomb and 0.8 micro coulomb in air is 0.2 Newton .what is the separation between the two spheres. |
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Answer» This is the RIGHT answer.Explanation:HOPE IT HELPS!!!!PLEASE MAKE IT BRAINLIEST ANSWER!!!! |
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| 13. |
The photoelectric effect can be explained by (a) Corpuscular theory of light (b) Wave nature of light (c) Bohr’s theory (d) Quantum theory of light |
| Answer» TION:B) WAVE NATURE of LIGHT | |
| 15. |
In photoelectric effect, the photoelectric current is independent of (a) intensity of incident light (b) potential difference applied between the two electrodes (c) the nature of emitter material (d) frequency of incident light |
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Answer» gdbgdgfyffhfgnfnjkjhktudifit |
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| 16. |
Einstein’s photoelectric equation is: |
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Answer» This is the right ANSWER. It has VERIFIED multiple times.HOPE IT HELPS!!!PLEASE MAKE IT BRAINLIEST ANSWER!!!!! |
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| 17. |
Work function of metal is (a) the minimum energy required to free an electron from surface against coulomb forces. (b) the minimum energy required to free an », nucleon. (c) the minimum energy to ionise an atom. (d) the minimum energy required to eject an electron orbit. |
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Answer» (a) Work function of metal is the MINIMUM energy required to free ELECTRONS from surface against couloumb forces[NOTE that this energy doesn't PROVIDE any kinetic energy or momentum to ELECTRON, which is achieved by providing additional energy]Hope this answer helped you :) |
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| 18. |
In photoelectric effect, stopping potential depends on (a) frequency of incident light (b) nature of the emitter material (c) intensity of incident light (d) both (a) and (b) |
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Answer» The STOPPING potenial DEPENDS on frequency of incident LIGHT and nature of the emitter material.for a GIVEN frequency of incident light, it is INDEPENDENT of its intensity. |
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| 19. |
100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be: |
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Answer» The answer will be 20 volt.Explanation: Given, Heat = 100J; Resistance = 4 ohm; Time = 1 second;ACCORDING to Joule's LAW, H = ; H = ( by V = IR ) (i)Now put the value of given VARIABLES in equation (i);So, ⇒ 100 = ; (here, T is 1 because we are ASKED for every second.) ⇒ 400 = ⇒ V = = 20 VTherefore, the potential difference will be 20 V when 100 J of energy is released every second in a resistor of resistance 4 ohm. |
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| 21. |
❤ integrate the function, ( 3sin a - 4 cos a ) da ??❤❤solve this ❤❤❤ |
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Answer» :Given Expression,The above expression can be REWRITTEN as :Consider the above expression to be of the form :Firstly,Also,Integral of : sin X = - cos x + C cos x = sin x + c THUS,the integral would be : |
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| 22. |
how many copies we have to make for physics class 9th icse board ... please add a description for what purpose those copies are needed |
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Answer» at LEAST two.Explanation:because there are a HOLE LOT of NUMERICALS. |
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| 23. |
the photoelectrons emitted when the surface of silver metal was irradiated with UV radiation of a certain frequency were found to have maximum kinetic energy of 9.6 x 10^-19 J . Given that the work function of silver is 7.12 x 10^-19 J , determine the wavelength of the ultra-violet radiation. |
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Answer» where the gastric GLAND is PRESENT our body NAME the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary gland a dxrdrftxctfuhuu the same day as WELL as the registered player WHETHER the use of the day of the day of the day of the day of the day of the day of the ù |
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| 24. |
A student performs an experiment and plots the V-I graph of series and parallel combination of two resistors. Which graph represents series combination of resistors? Justify your answer. |
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| 25. |
❤ integrate the function, ( 3x² + 2x + 1 ) dx ??❤❤solve this ❤❤❤ |
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Answer» This is the CORRECT answer.Explanation:HOPE IT HELPS!!!!PLEASE MAKE IT BRAINLIEST ANSWER!!!!! |
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| 27. |
Three v-I graphs are drawn individually for two resistor and their series combination.out of A,B,C which one represent the graph for series combination of the other two.give reason for your answer |
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Answer» Answer: The slope of the graph REPRESENTS the RESISTANCE. Most of the time the EQUIVALENT resistance of series combination is greater than the highest resistance. ... THEREFORE in the above case C is the graph of series combination of the two resistance |
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| 28. |
Why only electron can transfer from one body to another body in frictional electrics ? |
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Answer» because only they are in MOTION while in atomshope it HELPS you |
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| 29. |
The half life of a radio active substance is 13 years then the decay constant us |
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Answer» n :Given :-The half LIFE of a radio active substance is 13 years.To Find :-Decay constant of radio active substance.Formula :-▪ Half life of a radioactive substance is given byCalculation :-Additional information :-The radioactive radiations are of three types, α-rays, β-rays and r-rays. An α-particle CARRIES two units of positive charge and four units of MASS.A β-particle carries unit NEGATIVE charge and has negligible mass. |
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| 30. |
The node matheode of circuit analysis is based on |
| Answer» KIRCHOFFS laws EXPLANATION:current rule VOLTAGE rule | |
| 31. |
In photoelectric effect, the photocurrent (a) depends both on intensity and frequency of the incident light. (b) does not depend on the frequency of incident light but depends on the intensity of the inci-dent light. (c) decreases with increase in frequency of inci-dent light. (d) increases with increase in frequency of inci-dent light. |
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Answer» When intensity of incident photon increases NUMBER of ELECTRONS emitted from the SURFACE increases due to which current increases. FREQUENCY of incident photon only limits the maximum kinetic energy of the photoelectron emitted and so the current is INDEPENDENT of frequency of photon.KEEP SMILING....... |
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| 32. |
The phenomenon of photoelectric emission was discovered in 1887 by (a) Albert Einstein (b) Heinrich Hertz (c) Wilhelm Hallwachs (d) Philipp Lenard |
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Answer» The phenomenon of photoelectric EMISSION was discovered in 1887 by HEINRICH HERTZ.. |
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| 33. |
When a person is jogging in a path he has _____motion |
| Answer» UNIFORM MOTION . HOPE this HELPS plz mark as BRAINLIEST . | |
| 34. |
A Proton and an a-particle have the same de Broglie wavelength. What is same for both of them? (a) Mass (b) Energy (c) Frequency (d) Momentum |
| Answer» FREQUENCY only Explanation:MARK as brainliest PLS first | |
| 35. |
For 3D system, the schrodinger equation is true or false |
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Answer» ve STATEMENT is true.Explanation:HOPE IT HELPS!!!!PLEASE MAKE IT BRAINLIEST ANSWER |
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| 36. |
The velocity of a body of mass 5kg changes from 20m/s to 10m/s. Calculate the change of momentum of the body |
| Answer» CHANGE of MOMENTUM = m(v2-v1)=5*(10-20)= -50kgm/s | |
| 37. |
Which of the following statements is correct regarding the photoelectric experiment? (a) The photocurrent increases with intensity of light. (b) Stopping potential increases with increase in intensity of incident light. (c) The photocurrent increases with increase in frequency. (d) All of these |
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Answer» All of these PLS MARK as BRAINLIEST |
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| 38. |
The maximum value of photoelectric current is called (a) base current (b) saturation current (c) collector current (d) emitter current |
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Answer» the maximum VALUE of PHOTOELECTRIC current is CALLED SATURATION current |
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| 39. |
The minimum energy required for the electron emission from the metal surface can be supplied to the free electrons by which of the following physical processes? (a) Thermionic emission (b) Field emission (c) Photoelectric emission (d) All of these |
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Answer» where the gastric GLAND is present our body name the SECRETION of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary gland a dxrdrftxctfuhuu the same day as WELL as the registered player WHETHER the use of the day of the day of the day of the day of the day of the day of the ù |
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| 40. |
A metal surface ejects electrons when hit by green light but nothing when hit by yellow light. The electrons will be ejected when the surface is hit by (a) blue light (b) heat rays (c) infrared light (d) red light |
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Answer» 1 where the GASTRIC gland is present our BODY name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary gland a dxrdrftxctfuhuu the same day as well as the REGISTERED player WHETHER the use of the day of the day of the day of the day of the day of the day of the ù gggfgj233465 |
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| 41. |
An electron is moving with an initial velocity v = v0i and is in a magnetic field B = B0 j. Then, its de Broglie wavelength [NCERT Exemplar] (a) remains constant. (b) increases with time. (c) decreases with time. (d) increases and decreases periodically. |
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Answer» glie WAVELENGTH remains CONSTANT..for better ANSWERS please FOLLOW me.. mark as brainliest |
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| 42. |
Cathode rays were discovered by (a) Maxwell Clerk James (b) Heinrich Hertz (c) William Crookes (d) J.J. Thomson |
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Answer» where the gastric gland is PRESENT our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary glandwhere the gastric gland is present our body name the secretion of salivary gland a dxrdrftxctfuhuu the same day as WELL as the registered player whether the use of the day of the day of the day of the day of the day of the day of the ù yggcfxfx23 222211116&_&"&7&7577677756-+6-- |
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| 43. |
In photoelectric effect what determines the maximum velocity of electron reacting the collector? (a) Frequency of incident radiation alone (b) Work function of metal (c) Potential difference between the emitter and the collector (d) All of these |
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Answer» All of these EXPLANATION:PLS MARK as BRAINLIEST |
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| 44. |
The wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with 1 MeV energy is nearly [NCERT Exemplar] (a) 1.2 nm (b) 1.2 × 10-3 nm (c) 1.2 × 10-6 nm (d) 1.2 × 101 nm |
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Answer» option B is the RIGHT answer...for BETTER answers please follow me.please MARK as brainliest |
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| 45. |
A 500g one is thrown up with a velocity of 15m/s find its (1) potential energy at its max height (2) kinetic energy when it hits the ground |
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Answer» Both answers will be 56.25 JExplanation:We know that the MAXIMUM potential energy (when the ball is at it's maximum height) is equal to the kinetic energy when the ball is released, as according to the law of conservation of energy, the initial kinetic energy, will be converted into potential energy. HENCE, we don't need to know height to solve (1).Solution for (1): => potential energy = initial kinetic energy = 1/2 . m.v^2Given velocity(v) = 15m/s and mass in kg = 0.5kg = 1/2. 0.5.15^2 = 56.56 JSolution for (2):Again, according to the law of conservation of energy, energy neither GETS created nor destroyed, but only transformed from one form to another. In this case, maximum potential energy, gets converted BACK into kinetic energy. Hence kinetic energy when it HITS the ground is also, 56.25J.I hope the answers are correct! |
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| 46. |
Electrostatics Charged particles |
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Answer» ElectrostaticsCharged particlesThis is incomplete QUESTION FOLLOW me And ask the question Explanation:MARK as brainliest PLS I follow them |
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| 48. |
We have to make a separate copy for notes for science or not?? class 9th plz tell |
| Answer» YESS ull have a SPLIT up of PCB need to make seperate notesmark rhis as BRAINLIEST | |
| 49. |
a 500g one is thrown up with a velocity of 15m/s find its potential energy at its max height and kinetic energy when it hits the ground |
| Answer» SORRY I don't KNOW the ANSWER OK...... | |
| 50. |
Determine the potential difference between the end of a wire of resistance 10 charge passes through it per minutes, if 380 coulomb |
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Answer» Potential difference is equals to the PRODUCT of current flow and RESISTANCE and current is equals to CHARGE flow per SEC therefore potential differences = 380/60*10 = 633.33 |
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