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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. |
How ohms law be used to define ohm |
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Answer» Explanation: Ohm's law which STATES that the current PASSING through a CONDUCTOR is proportional to the voltage over the resistance. EQUATION. |
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| 2. |
A body moving along straight line covers a distancein three equal parts with speed 2 m/s, 3 m/s and4 m/s, then its average speed is(1) 12 m/s(2)13/12 m/s(3) 36/13 m/s(4)12/13 m/s |
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Answer» Answer:36/13 Explanation: Let the total distance be 3X. The time REQUIRED are x/2 , x/3 and x/4 respectively . AVG SPEED = total distance/total time = 3x/x/2+x/3+x/4 =3x/13x/12 =36/13 m/s |
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| 3. |
A rectangular block of iron has dimensions l x l x b. What is the resistance of the block measured between the two square ends?.Give p resistivity. |
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Answer» PLEASE LET me CHECK my EMAILS PERIODICALLY |
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| 4. |
The speed of an electron is an electron is an uniform electric field changes from 0.95c to 0. 98c calculate the percentage of change in mass |
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Answer» Kristy and I have to be a good day at work now and I have a bright future AHEAD of me to do it again in a few days and I have a future ahead of me to do it again in a few days and I have a bright future ahead of you who have been a while to we erwtetet R we w w I don't WANT to be a good day at work now and I don't want you so bad for her to the gym today and it was a good day today with the is in the MORNING and |
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| 5. |
a car travels certain distance with a speed of 50kmh-¹ and returns with a speed of 40kmh-¹. calculate the average speed of whole journey |
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Answer» Answer: 50 km/h =50×1000/1×60×60 =125/9 m/s 40 km/h =40×1000/1×60×60 =100/9 m/s Second Distance= 100M in 9s Avg.Speed= TOTAL S/total T =125+100/9+9 m /s =225/18 m/s =12.5 m/s |
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| 6. |
A vector = i+j+k and b vector = -2i-2j-2k |
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Answer» What is your question MATE?? PLEASE check your question and UPDATE it for better answer......... |
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| 7. |
Force and low of motion class 9 formulaes |
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Answer» f=ma ( MASS × ACCELERATION DUE to GRAVITY) |
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| 8. |
একজন লােক দক্ষিণদিকে 2 m/s বেগে হাঁটছে। তার মনে হল ঠিক পূর্বদিকথেকে বায়ুপ্রবাহ হচ্ছে। লােকটি দ্বিগুণ বেগে চললে তার মনে হয় ঠিক দক্ষিণ-পূর্বদিক থেকে বায়ুপ্রবাহ হচ্ছে। বায়ুপ্রবাহের বেগ নির্ণয় করাে। |
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Answer» here's your Answer is it WRITTEN in punjabi. |
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| 9. |
Find the position of the object which when placed in front of a concave mirror ofradius of curvature 40 cm produces a virtual image, which is twice the size of theobject. Draw the ray diagram also |
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Answer» LESS than 20 CM. Which is its FOCAL length Explanation: |
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| 11. |
Write all the three law of motion with its mathematical expression |
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Answer» v=U+at v=u+1/2at SQUARE ( only t's square) 2as=v square -u square |
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| 12. |
Name the four types of forcesin nature . What are their relative strenghts? |
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Answer» four TYPES of force are - A. Gravitational force B.Strong force C.Weak force D.Electromagnetic force These FORCES prevent the drifting of matter in the universe and helps keep it TOGETHER ... It has strength of 6*10-³9 in comparison to the strength of the strong force . |
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| 13. |
Define the term potential energy for charge q at a distance r in an external field. |
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Answer» Explanation: In physics, POTENTIAL energy is the energy held by an OBJECT because of its position RELATIVE to other objects, stresses within itself, its ELECTRIC CHARGE, or other factors. hope it helps.... |
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| 14. |
List the examples of the force that is exerted by the muscles in our body |
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Answer» when we SQUEEZE a toothpaste. when we PUSH anything. |
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| 15. |
If the diameter of a copper wire is doubled its current carrying capacity becomes |
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Answer» Answer: If the diameter of a copper wire is doubled then its current carrying capacity will become become double. Explanation: According to the Ohm's Law V=IR Therefore I ∝1/R That means I will increase if R DECREASES. And I know that R ∝ Ρ*L/A where P = density , l = LENGTH and A = Area Area is INVERSELY PROPORTIONAL to Resistance that means Area decreases if R increases. Now we know that R is inversely proportional to both Area and Current. That means Area is directly proportional to Current i.e. A ∝ I Hence, if the diameter of a copper wire is doubled then its current carrying capacity becomes double. |
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| 16. |
If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is half of that of earth and radius is same as that of earth is |
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Answer» g = Gm\ 2r(SQUARE) Explanation: gravity of planet = g mass of earth = m mass of planet = m\2 mass of object on SURFACE of planet M radius = r force = f acceleration DUE to gravity on planet = g f = GMm\2 r(square) MG = GMm\2 r(square) g = Gm \2 r(square) |
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| 17. |
If 4 resistances each of 1 ohm are connected in series what will be total resistance |
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Answer» ANSWER: 4 ohms Explanation: when RESISTORS are CONNECTED in series, EFFECTIVE resistance is sum of all which are in series. |
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| 18. |
Magnetic energy is reduce due to the formation of? |
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Answer» Answer: REDUCING this energy is the MAIN REASON for the creation of magnetic DOMAINS. ... EH is ZEEMAN energy: This is energy which is added to or subtracted from the magnetostatic energy, due to the interaction between the magnetic material and an externally applied magnetic field. |
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| 19. |
Particle with longest debroglie wavelength |
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Answer» Explanation: Therefore, β-particle has the LONGEST de BROGLIE wavelength. |
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| 20. |
3. Visit a Badminton Court/Basket ball Court in your locality and find out the displacement between twodiagonally opposite corners of the court. |
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Answer» Answer: |
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| 21. |
How to derive all three equations by graphical method |
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Answer» Answer: only ONE GRAPH is required from which we can DERIVE all equations |
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| 22. |
Find the position of the object which when placed in front of a concave mirror ofradius of curvature 40 cm produces a virtual image, which is twice the size of theobject. |
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Answer» Answer: Explanation: focal length f= -40cm and magnification m = +2 = -v/u or v= -2u_______(1) now, the mirror relation is 1/f = 1/v + 1/u or -1/40 = (u + v)/uv = u-2u /(-2u)2 [substituting value of v from EQ. (1)] u= -20cm ꧁ Mark As Brainliest Answer ꧂ And Follow Me |
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| 23. |
a man moves 10 metre interaction of 30 degree north of East 1010 root 2 metre in south west direction and final 20 metre in direction 60 degree east of South find the net displacement |
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Answer» vjjxhhxhxhdufifudhsysigiystsufiv |
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| 24. |
Please find the solution to the question |
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Answer» a 1.5 , 1A b 4 l please MARK as BRAINALIST |
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| 25. |
Briefly explain about Pascal law |
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Answer» Pascal's law (also Pascal's principle or the principle of transmission of fluid-pressure) is a principle in fluid mechanics that states that pressure at a POINT has infinite direction, and THUS a pressure CHANGE at any point in a CONFINED incompressible fluid is transmitted throughout the fluid such that the same change occurs EVERYWHERE. The law was established by French mathematician Blaise Pascal in 1647–48. |
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| 26. |
If average walking speed of a girl from her home to school is 4km/h and it takes her 15 min to reach there.calculate the distanxe between her homevand school |
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Answer» Answer: Required distance between her home and school is 1 kilometre. Explanation: Average walking speed = 4 km / h From the properties of speed
Here, It TAKES 15 minutes for her to reach her school. On the BASIS of the formula given above : = > 4 km / h = Distance / 15 min = > 4 km / h x 15 min = Distance = > 4 km / 60 min x 15 min = Distance = > 4 km / 4 = Distance = > 1 km = Distance Hence the required distance between her home and school is 1 kilometre. |
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| 27. |
Process in which water vapour changes into water called |
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Answer» Answer: It's condensation .HOPE it helps you. please MARK as BRAINLIEST |
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| 28. |
What ithe unit of specific gravity? |
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Answer» Answer: Your question is WRONG . |
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| 29. |
what is a solenoid?compare the magnetic field produced by a solenoid with the magnetic field of a bar magnet . |
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Answer» Explanation: cylindrical coil of wire acting as a magnet when CARRYING ELECTRIC current. The nature of magnetic field lines produced by a solenoid is similar to that of a bar magnet. the field lines are closed curves, they EMERGE from the north pole and merge in the south pole OUTSIDE the magnet and inside the direction is from south to north. inside the solenoid and a bar magnet the field is uniform |
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| 30. |
What type of motion occurs when an object spins around an axis without altering its linear position? |
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Answer» As per the question, object is spinning around an axis without ALTERING its linear POSITION. An object is said to be in rotational motion if every PARTICLE of object moves in CIRCULAR path with their center situated on the axis of rotation. |
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| 31. |
Arrange the following in decreasing order of force of attraction water ,salt,oxygen, and give reason |
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Answer» salt > water > oxygen Explanation: IN SOLID FORCE OF ATTRACTION IS MAXIMUM IN LIQUID FORCE OF ATTRACTION IS MODERATE IN GASES FORCE OF ATTRACTION IS MINIMUM salt is a solid water is liquid oxygen is gas |
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| 32. |
5 examples of acceleration against the direction of motion |
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Answer» Banabakabkavhxggzvzd |
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| 33. |
If ao be the radius of first bohr's orbit of hydrogen atom, then the de broglie wavelength of a electron revolving in the third orbit is |
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Answer» 6πx |
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| 34. |
If all forces act simultaneously on aparticle at rest at the origin. Find the plane |
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Answer» Answer: Explanation: FIND the directions and MAGNITUDE of F1+F2+F3, F1-F2+F3.' and find homework ... Three forces acting at a POINT are F1=2i-j+3k, F2=-i+3j+2k, F3=-i+2j-k. Find the ... The resultant vector has a magnitude of 5.66 units and it is located in y-z plane. ... 1 educator answer; The POSITION vector of a particle is given by R(t)=t^3*i+t^2*j. |
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| 35. |
Is refractive index directly proportional to deviation? |
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Answer» Curiositi. It is directly proportional to the refractive INDEX of the optical medium. It is directly proportional to the THICKNESS of the optical medium. ... It is directly proportional to the wavelength of LIGHT. |
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| 36. |
Pulsed laser deposition in hybrid perovskite solar cells |
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Answer» Answer: Explanation: Pulsed laser deposition (PLD) has proved to be an EXTREMELY versatile technique for growing high QUALITY CRYSTALLINE thin films of various metal OXIDES and their interfaces as well as other inorganic materials. |
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| 37. |
Numericals related to compound microscope |
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Answer» Answer: Explanation: FIRST, CALCULATE the image distance from the objective lens (do'). The objective lens is the converging lens so that the image distance calculated USING the equation of the converging lens. The focal LENGTH of the converging lens is positive. ... The microscope has both objective and eyepiece (OCULAR) lenses. |
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| 38. |
Potential at the centre of a solid non conducting sphere |
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Answer» Gauss' Law tells us that the electric field OUTSIDE the sphere is the same as that from a point charge. This implies that outside the sphere the potential ALSO looks like the potential from a point charge. What about inside the sphere? If the sphere is a CONDUCTOR we know the field inside the sphere is zero. |
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| 39. |
Potential difference depends on frame of reference? |
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Answer» The potential energy has a gauge freedom, that is we can define the zero to be anywhere we want without AFFECTING the physics. A side effect of this is that we cannot experimentally measure potential energy, we can only measure differences in potential energy. So when you say the potential energy of an object RAISED to a height h is mgh, what this really means is that RAISING an object by a distance h changes the potential energy by mgh i.e. the difference in the potential energy before and after raising was mgh. The person holding the SUITCASE can define its potential energy to be zero, but this is just a choice of gauge. Regardless of how the person holding the suitcase defines the potential energy it still changes by +mgh when it is raised by a distance h and −mgh if it is lowered by a distance h. |
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| 40. |
What role does water play in a hydraulic press to multiply a small force into a large one?(any girl)✌ |
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Answer» Answer: The role of the fluid is to transmit its PRESSURE. To create a very large force you take ADVANTAGE of the area of the cross SECTION of the hydraulic CYLINDER that moves the PRESS platen. |
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| 42. |
How to derive ohm's law |
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Answer» Answer: Current is directly PROPORTIONAL to potential difference. I४v. THEREFORE V४I . V= IR. R is constant until TEMPERATURE remain constant Explanation: |
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| 43. |
An object starts moving from origin with a constant acceleration along a straight path . Draw its distance time graph |
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Answer» Banabakabkavhxggzvzd |
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| 44. |
Write symbols of the following circuit elements: (i) Battery (ii) Ammeter (iii) Voltmeter State the role of these elements in an electric circuit. |
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Answer» Answer: A battery is an ELECTROCHEMICAL cell that can be CHARGED electrically to provide a static potential for power or released electrical charge when needed. An ammeter is a measuring instrument used to MEASURE the current in a circuit. A voltmeter is an instrument used for measuring electrical potential difference between two points in an ELECTRIC circuit.
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| 45. |
Calculate the accelaration and distance of the body moving with 5m/s which comes to rest after traveling for 6 sec? |
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Answer» Answer: 0.83333..m2/s Explanation: u=0m/s(as the body starts from REST) t=6s as we KNOW that acceleration (a)=v-u/t so,a=5-0/6 a=5/6m2/s or 0.8333m2/s |
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| 46. |
Why is water not used instead of mercury in thermometers can easily available to us ? |
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Answer» Explanation: Search Results Featured snippet from the web Mercury is the only one in liquid state at ROOM temperature. It's USED inthermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is NOTABLE when it's used in athermometer. It also has a high boiling point which makes it very suitable to measure HIGHER TEMPERATURES. |
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| 47. |
Is nano particles settle down on ultracentrifugation? |
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Answer» Answer: Explanation: 1) Silver NANOPARTICLES of 10nm or larger are centrifugally pelleted at 12-15,000rpm over 1 h-90mins, LEAVING silver nitrate in SOLUTION. ... Centrifuge your particles at 5000 rpm for 20 minutes. Then re-dispersed nanoparticles in deionized water and again centrifuge. |
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| 48. |
Ratio of de broglie wavelength of proton and alpha particle |
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Answer» Explanation: WAVELENGTH of an ALPHA Particle. An alpha particle (m = 6.64 × 10-27 kg) emitted in the radioactive DECAY of uranium-238 has an energy of 4.20 MeV. |
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| 49. |
Rainbow is a combined effect of dipresion, reflection |
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Answer» Answer: EXPLANATION:Aren't rainbows just the most beautiful natural occurrence in the world? ... colors occurs showing white light is a combination of seven separate colors. ... and has a different consistency as compared to a GLASS PRISM, still it affects light in a ... Some of that REFLECTED light passes out of the drop, bending as it MOVES back into the ...
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| 50. |
A ball is projected vertically upwards at t = 0. The ball is at same height at time 4 s and 8 s. The maximum height attained by the ball is(g = 10 m/s2)(1) 120 m(2) 80 m(3) 180 m(4) 100 m |
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Answer» answer : option (3) explanation : A ball is projected vertically upwards at t = 0. The ball is at same height at time 4 s and 8 s. The trajectory of the ball obeys the equation , S = ut + 1/2 (-g)t² , [where u is initial velocity of ball,and g is acceleration DUE to gravity. ] so, at t = 4s and 8s , height of ball remains same. putting value of t = 4s S = u(4) + 1/2(-g) × (4)² = 4u - 8g ....(1) putting value of t = 8s S = u(8) + 1/2(-g) × (8)² = 8U - 32g .....(2) from EQUATIONS (1) and (2), S - S = (8u - 32g) - (4u - 8g) or, 0 = (8u - 4u) - (32g - 8g) or, 0 = 4u - 24g or, u = 6G.....(1) at maximum height velocity of ball becomes zero. so, final velocity of ball , v = 0 now using formula, v² = u² + 2(-g)h here, v = 0, u = 6g so, 0 = (6g)² - 2gh or, h = 36g²/2g = 18g when g = 10m/s² then, h = 180m hence, maximum height attained by the ball is 180m |
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