Saved Bookmarks
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. |
What is the velocity at maximum height of a projectile motion if initial velocity is u? |
|
Answer» Answer: The VELOCITY at the maximum height of a projectile body will be ZERO as it stops and starts to fall freely. hope it helped and please mark as BRAINLIEST:) |
|
| 2. |
Ch-3 ➡️ Nazim and the rise of Hitlerplease tell me these questions if possible please attach pic also tell and tell in which page number answer is |
| Answer» | |
| 3. |
A ball is thrown up caught by thrower after 4sec . How high did it go and with what velocity was it thrown? |
|
Answer» total time taken = 2u/g as g = 10 m/s^2 and total time taken is 4 sec, 4=2u/10 2u = 40 maximum height = u²/2g =400/20 = 20 m hope it helped and pleeeeeeeeeease mark as BRAINLIEST:) |
|
| 4. |
What is different between mass and weight? |
|
Answer» Answer: Mass is the amount of matter PRESENT in the object Explanation: the SI unit of mass is kg mass is the SCALER quantity its valie does not change even we go to another planet weight: the weight of an object is DEFINED as the force with which the EARTH attracts the objects the force (f)on an objectof mass |
|
| 5. |
The angular frequency of a fan increases from 30rpm to 60rpm in pi seconds. A dust particle is present on the blades at distance 20 cm from axis of rotation. Find the net acceleration of dust particle at the end of 5 seconds |
|
Answer» Answer: 0 Explanation: the fan TAKES PI SECONDS to accelerate from 30 to 60rpm. after pi seconds are over the PARTICLE stops accelerating and moves with constant speed. thus the net acceleration of the particle is zero |
|
| 6. |
Plz tell fastlet's see who does right |
|
Answer» EXPLANATION: HEY MATE This MIGHT HELP You!!!! |
|
| 7. |
What is the name given to a vibration of the lowest frequency and maximum amplitude ? |
|
Answer» Answer: In mechanical SYSTEMS, RESONANCE is a PHENOMENON that only occurs when the ... Frequencies at which the RESPONSE amplitude is a RELATIVE maximum are also known as resonant ... |
|
| 8. |
Write a short note on aufbau principles |
|
Answer» Explanation: The AUFBAU principle dictates the manner in which electrons are FILLED in the atomic orbitals of an atom in its ground STATE. It states that electrons are filled into atomic orbitals in the increasing order of orbital energy level. ACCORDING to the Aufbau principle, the available atomic orbitals with the lowest energy levels are OCCUPIED before those with higher energy levels. |
|
| 9. |
What is biofocal lenght and how can be it corrected |
| Answer» | |
| 10. |
Electricity in which charges are not in motion |
| Answer» | |
| 11. |
Name 5ways which u can save energy? |
|
Answer» Answer: we can SAVE energy in MANY ways we should do WORK if we are able to do that WITHOUT using energy |
|
| 12. |
Integral multiples of the fundamental vibrations are called ______________. |
|
Answer» Answer: Harmonics are SIMPLY integral MULTIPLES of the FUNDAMENTAL frequency. |
|
| 13. |
Two cars are moving at 30 kmph in same direction at an interval of 10 minutes. if a truck moving in the opposite direction crosses the two cars at an interval of 4 minutes the speed of the truck is |
|
Answer» Answer: Here we will apply relative CONCEPT let the SPEED of the car is u then relative speed of car with respect to car c is (u+30) Distance is 5 kilometres Time is 4minutes= 4÷ 60 hours Speed= distance/ time U+30= 5/4/60 U+30=5×60/4 On solving above equation we get U+30 = 75 then u= 75 - 30= 45 km/h Explanation: |
|
| 15. |
Stories on types of force |
|
Answer» Explanation: Force is strength or energy applied towards any object for physical action or any movement. A force is a push or pull resulting due to the INTERACTION between two objects. Force is external and results only when there is interaction between objects. Different types of forces and their examples Force can be classified into two broad categories 1. Contact forces These are those types of forces when two objects interact with each other; they have a physical contact with each other. Types of contact forces are: Frictional force; Tension force; Normal Force; Air Resistance Force, Applied Force, Spring Force. I. Frictional force As an object moves across a surface it causes friction. Friction force can be sliding or static. Friction depends upon the nature of the two interacting surfaces. Example: A book sliding on the table, a ball rolling on the floor. II. Tension force A force that is transmitted through a string, rope, cable or wire when it is pulled tightly by the object on the opposite end is a tension force. This force flows across the length of the wire or rope. Example- A cable car or climbing a mountain using a rope. III. Normal force This is the force exerted upon an object that is in contact with another stable object. USUALLY a normal force is applied horizontally between two objects in contact. Example-A book resting on a table or a person leaning on the wall. IV. Air Resistance force This a frictional force applied on objects when they are in air. Often the Air Resistance force OPPOSES the movement of the object. It is NOTICEABLE for objects that travel at high speed up in the air. Example- An airplane or a parachute. V. Applied force A force with which an object has been pushed or pulled. Here a force is applied to an object by a person or any other object. Example- A person pushing a chair to the other side of the room VI. Spring force It is the force which results when a spring is stretched or compressed. A spring is a metal elastic device that returns to its original form when pulled or pressed. If the spring is stretched, spring force is attractive. If it is compressed, spring force is repulsive. Example- Trampoline, diving board etc. 2. Action at a distance forces These types of forces happen when two interactive objects are not in physical contact with each other; yet they are able to push or pull. Types of Action at a distance forces are: Gravitational force, Electrical force and Magnetic forces. I. Gravitational force This is the force by which the Earth or moon or other massively huge objects attract another object towards them. All objects on the Earth experience the gravitational force, which is directed downwards towards the center of the earth. The force of gravity is always equal to the weight of the object. II. Electrical force It is one of the FUNDAMENTAL forces of the Universe. It is a force that exists between all charged particles. It is all around us. It is responsible for making our hair stand on a cold day. When the hair on the head stands and refuses to be brushed, that is static energy. It is this force which allows you to see when you turn on the lamp in a dark room. III. Magnetic force This is a push or pull exerted by a magnet. The force of attraction between an object and a magnet is called magnetism. All magnets have north and south poles. This force is the attraction or repulsion that arises between electrically charged particles due to their motion. Example- Iron nails when placed near a magnet. |
|
| 16. |
A constant force acts on a body of mass 50g at rest for 2seconds. If the body moves through 27m during that time. Find its impulse |
|
Answer» ANSWER: PLEASE BUDDY please MARK me BRAINLIEST |
|
| 17. |
Uses of position time graph |
|
Answer» Answer: Uses of position time GRAPH:-
hope it helps and pleeease MARK as brainliest:) |
|
| 18. |
One mole of an ideal gas undergoes anisothermal change at temperature 'T' so thatits volume v is doubled. R is the molar gasconstant. Work done by the gas during thischange is |
|
Answer» Answer: 35. ONE mole of ideal GAS expands isother- mally to DOUBLE its volume at 27°C. Then, the work done by the gas is nearly |
|
| 19. |
Which is best physics teaching Youtube channels in the world |
| Answer» | |
| 20. |
Using diamensions,prove 1Newton=10^5dyne |
|
Answer» Answer: 1 N force is the force which when APPLIED on a 1 kg mass RESULTS to an acceleration of 1 m/s2 in the body. 1 dyne force is the force which when applied on a 1 gram mass leads to an acceleration of 1 CM/s2 in it. 1 kg = 1000 gram and 1 m = 100 cm => 1 N = 1(kg)(m/s2) = (1000 gram)(100cm/s2) = 105 dyne. Read more on Sarthaks.com - https://www.sarthaks.com/142036/prove-that-1-newton-10-to-the-power-5-dyne |
|
| 21. |
What is the name given to a vibration of the lowest frequency and maximum amplitude? |
|
Answer» Answer: |
|
| 22. |
Explain the reasons for the following when a carpet is beaten with a stick dust comes out of it be luggage kept on the roof of a bus is tied with a rope see it pace bowler in cricket drawings is inform from a long distance before he bowls bowls |
| Answer» | |
| 23. |
State parallelogram law and obtain an expression magnitude of resultant vector |
Answer» Answer:The Statement of Parallelogram LAW of vector addition is, If two VECTORS are considered to be the ADJACENT sides of a parallelogram, then the RESULTANT of two vectors is GIVEN by the vector that is a diagonal passing through the point of contact of two vectors. |
|
| 24. |
What is relationship between work and energy with example |
|
Answer» Answer: Energy applied on a OBJECT which is in rest state the object get displaced hence it is Said to be work is done. example- A GIRL pulling his toy CAR. . HOPE you get it. #ßrainly.com brainlist plz |
|
| 25. |
S=2t+1/2 3t square , initial velocity is |
|
Answer» 2 m/s Differentiate s w.r.t. t . Initial velocity i.e.at t=0 . Put 0 at the place of t and it will GIVE initial velocity as 2 m/s |
|
| 26. |
Give 5 examples of temporarychanges |
|
Answer» the ice changes in WATER the SAND changes into dry the water changes water vapour water changes into DIRTY water |
|
| 27. |
the velocity v of a particle depends upon t according to the equation v=a+bt+c/(d+t). write the dimensions of a,b,c and d |
| Answer» | |
| 28. |
A ball is thrown horizontally from the top of tower100 m high, with speed 10 m/s. After 2 seconds offall, gravity disappears. Then total time taken by ballto reach the ground is (g = 10 m/s2) |
|
Answer» Answer: Total time taken by the BALL to REACH the ground = 6 seconds Time taken by the ball to reach the ground after the gravity disappears = 4 seconds Explanation: The height of the tower = 100 m Initial horizontal SPEED = 10 m/s Ball is thrown horizontally from the top of the tower therefore its initial vertical speed will be zero Thus using the second equation of motion The vertical distance h covered in 2 seconds or, Therefore the height left = 100 - 20 = 80 m The vertical VELOCITY after 2 seconds using the first equation of motion
Since the gravity disappears after 2 seconds therefore there will be no acceleration in the vertical direction time taken to cover 80 m distance = distance/velocity = 80/20 = 4 seconds Therefore, total time taken by the ball to reach the ground = 2 + 4 = 6 seconds |
|
| 29. |
If A=2 and B=7 and thita=45° then A vector •B vector=? |
|
Answer» Answer: 14/√2 Explanation: A B = ABcos THETA =14/√2 |
|
| 30. |
Full Derivation of LCR circuit in parallel. |
|
Answer» Answer: The Parallel LCR CIRCUIT is the EXACT opposite to the SERIES circuit we looked at in the previous tutorial although some of the previous concepts and equations still apply. |
|
| 31. |
"flow of electrons is electric current""electric current in resistor having high resistance gives result to production of heat""flow of electrons in a resistor having high resistance gives result to production of heat" is what i Concluded. Explain in brief |
|
Answer» Answer: ▶Here's your answer⏩When electric CURRENT passes through a high RESISTANCE wire like nichrome it BECOMES HOT and produces heat... This effect is also known as HEATING effect of electric current.... Hope it helps ✌ |
|
| 32. |
the velocity of an electron in its 5th Orbit if the velocity of an electron in the second orbit of the sodium atom is new you will be |
| Answer» | |
| 33. |
What is the commercial important of coal tar |
|
Answer» Answer: This medication is used on the skin to treat the itching, scaling, and flaking due to skin CONDITIONS such as psoriasis or seborrheic dermatitis. Coal tar BELONGS to a class of drugs known as keratoplastics. It works by CAUSING the skin to shed dead cells from its TOP layer and slow down the growth of skin cells. Explanation: If my answer is correct please MARK me as brainliest and give me a like |
|
| 34. |
Using constraint equations find the relation between a1 and a2 |
|
Answer» Explanation: CONSTRAINT Equation. A constraint equation is the definite RELATION that the unknown VARIABLES ALWAYS maintain between them. |
|
| 36. |
a plane mirror is placed horizontally on level ground at a distance of 60 m from the foot of a tower light ray from the top of Tower Falling In the age of the division of 90 degree the height of the Tower is |
|
Answer» EXPLANATION:HOPE it HELP |
|
| 37. |
28. Mr. Verma drives his car at uniform speed from bottomof a mountain to the top in 30 minutes along a helicalpath as shown.MountainInitial postonAt the beginning the speedometer of his car show 6225km, while on reaching the top it reads 6285 km. (Takeupward as positive y-axis and positive x-axis towardsright) The total distance covered is(a) 30 km() 20 km(c) 60 km(d) cannot be determined |
| Answer» | |
| 38. |
The angular momentum of an electron in hydrogen atom is proportional to |
|
Answer» l=0 because s VALUE so it PROPORTIONAL to s |
|
| 40. |
. a) Write two difference between sound wave and light wave.b) Write an expression relating wave velocity, wavelength and frequency.c) If speed of sound in air is 340m/s, calculate 1) wavelength when frequency is 25 |
|
Answer» No 1sound wave is longitudenal wave No 2 SOND wave NEEDS medium to PROPOGATE NO1 light wave it do not NEED any medium to porpogate No 2 sound wave is electro magnetic wave |
|
| 42. |
If we increase velocity two times than what will be temperature? |
|
Answer» Answer: 34 |
|
| 43. |
2. A thin flexible wire of length is connected totwo adjacent fixed points and carries a currentſ in the clockwise direction, as shown in thefigure. When the system is put in a uniformmagnetic field of strength B going into theplane of the paper, the wire takes the shape ofa circle. The tension in the wire is |
|
Answer» Where is the FIGURE.... |
|
| 44. |
If we increase velocity 2 times than what will be temperature? |
|
Answer» ANSWER: temperature is increased when there is an increase |
|
| 45. |
Add a force of 8N directed North wards to a force of 6N directed West wards calculate the magnitude and direction of the resultant with North |
| Answer» | |
| 46. |
If the measured values of two quantities are A+-deltaA and B+-deltaB,delta and deltaB being the mean absolute errors .what is the maximum possible error in A+-B? show that if z= A/BdeltaZ/Z=deltaA/A+deltaB/B |
|
Answer» Here is your answer |
|
| 47. |
The angle of incidence is 45 degree what will be the value of angle of reflection |
|
Answer» ACCORDING to law of reflection Angle of INCIDENCE = angle of reflection So angle of reflection = 45° |
|
| 48. |
What are the dimension of the quantity 1/ g,1 being the length and g the acceleration due to gravity? |
|
Answer» Answer: 1/g can be REPRESENTED as length / gravitational acceleration BASED on the question. the dimension of g = [L¹T⁻²] the dimension of length = [L¹] l/g = [L] / [L¹T⁻²] = [T²] ( as L₁ and L⁻¹ get cancelled ) |
|
| 49. |
Rest and motion proper defination |
|
Answer» Answer: A body is said to be in rest when it does not change its position with RESPECT to its SURROUNDINGS and time. A body is said to be in motion when it changes its position with respect to its surroundings as well as time. rest and motion are relative ie the depend upon the frame of reference . The frame of reference is the POINT of view or from where we are observing. hope it helped and PLEASE mark as BRAINLIEST:) |
|
| 50. |
Give me 20 example of Newton 1 law |
|
Answer» Explanation: INERTIA was best explained by Sir Isaac Newton in his first law of MOTION. Basically, the law states that an object at rest stays at rest and an object continues its state of motion until an external force acts on it. Here are some examples: One's body movement to the SIDE when a car makes a SHARP turn.Aug |
|