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.
| 2. |
A piece of wire of resistance 20 ohm is drawn out as that its length is increased to twice its original length .calculate new resistance.And resistivity |
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Answer» Answer: A piece of wire of resistance 20Ω is DRAWN so that its length is increased to twice is original length. CALCULATE resistance of the wire in the new situation. R=ρlA or 20Ω=ρlA. When the length becomes 2L and cross-sectional AREA is A/2. Explanation: hope it HELPS to you |
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| 3. |
The si unit of volumetric mass density of substance is |
Answer» SI UNIT OF VOLUMETRIC MASS DENSITY OF SUBSTANCEKilogram per METER cubeKilogram per meter cubeKg/m^3 |
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| 4. |
A cubeofside a haschargeqIts verticesdetermine thePotential and electric field at thecentre of thecube? |
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Answer» PLEASE INBOX ME PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE |
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| 5. |
The displacement of a particle is given by x(t)= 4 t^2 +8 t m. Its velocity at t = 5 s will be:- |
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Answer» Answer: x(t)= 4 t^2 + 8 t m FORMULA of velocity = DISPLACEMENT/ time = d/dt ( 4t^2 + 8T ) = 8t + 8 now , put t = 5 s = 8(5) +8 ANS = 48 m
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| 6. |
Si and cu are cooled at themperature of 300k then resistivity |
Answer» SORRY DEAR don't KNOW the ANSWER... |
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| 7. |
Inside the magnet, the field lines are directed from: (1) from north to south (2) from south to north (3) away from north pole (4) none of these |
Answer» YOUR ANSWER IS=> inside the magnet, the field LINES are DIRECTED from :- 2) south to NORTH |
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| 8. |
The physical quantity corresponding to the rate of change of displacement its SI unit is |
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Answer» The physical QUANTITY which corresponds to the RATE of change of DISPLACEMENT is velocity. The SI unit of velocity is m/s. Velocity = Displacement / Time. |
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| 9. |
On addition of soluble impurity in surface tension ......... |
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Answer» Answer: DECREASE the SURFACE tension when non soluble....btw it INCREASE |
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| 11. |
On addition of soluble impurity in surface tension |
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Answer» Answer: As surface tension INCREASES, intermolecular forces increase. ... The Presence of ImpuritiesThe presence of impurities on the surface of, or dissolved in, a substance DIRECTLY affects the surface tension of the liquid. The surface tension of WATER, for example, will increase when highly SOLUBLE impurities are added to it. |
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| 12. |
Calculate the speed of the body after 6 minutes, in m/s. Find the answer upto 2 places of decimal. |
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Answer» Time=6*60second=360second Speed =Distance/Time = 60/360 |
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| 14. |
Friction always acts ______________________in the direction of motion of an object. |
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Answer» opposite this is the answer Explanation: if any GIRL interested to talk me then inbox me |
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| 15. |
An electric motor takes 5 A from a 220 V line. Determine the power ofthe motor and the energy consumed in 2 h. |
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Answer» V=220V I=5A P = V×I P= 220×5 P=1100W t=2h=2×60×60=7200s P=1100×7200=7.92×10^6J Power of the MOTOR is 1100W Energy consumed by the motor is 7.92×10^6J please mark me as the brainliest and click thanks |
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| 16. |
The advantage of NC is?1.reduce manufacturing time2.reduce fixturing3.reduce non-productive time4.all of these |
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Answer» Answer: 2 REDUCE fixturing Explanation: |
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| 17. |
The coefficient of static friction between thetwo blocks shown in figure is u and the table issmooth. What maximum horizontal force F canbe applied to the block of mass M so that theblocks move together ? |
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Answer» Explanation: acceleration of system = F/m1+m2 frictional FORCE ACTING on BLOCKS = F-f=MF/m1+M f=m1F/M+m1 it should be less than static frictional force m1F/M+m1 <= um1g F<= UG(M+m1) |
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| 18. |
What is the meaning of trajectoryDon't give irrelevant answer |
Answer» the path followed by any object when it is THROWN in AIR is called trajectory |
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| 19. |
State Ohm's law. How ammeter and voltmeter should be connected inelectric circuit ? What is the use of these instruments, in the circuit ? |
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Answer» Explanation: (a) Voltmeter is the device used for measuring potential differences. Voltmeter is ALWAYS connected in parallel to the RESISTANCE. (b) Generally the resistance of Voltmeter is higher than the resistances which we will use.As they are in parallel the VOLTAGE ACROSS them is equal. Iv=V÷Rv
As Rv is large the value of V÷Rv is taken to be zero. So the value of current is zero and the electric energy used by this is zero. |
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| 20. |
Two identical metal spheres carrying charges 3 x10-9 C and -2 x 10-9 C are brought in contactwith each other and then separated by a distanceof 1m in a medium of dielectric constant 10. Findthe electrostatic force between them. |
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Answer» Answer: 5.4 Explanation: 10×8.854×10^12=K F=5.4N |
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| 21. |
Name the energy possesed by a stretched capult |
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Answer» Answer: Elastic potential ENERGY. .The stretched catapult POSSESSES potential energy due to change in its SHAPE and it throws the STONE with high speed. |
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| 22. |
Physics work book : Volume -IDLEVEL-18. A centrigrade and a Fahrenheit thermo-meter are dipped in boiling water. Thewater temperature is lowered until theFahrenheit thermometer registers 140°.What is the fall in temperature as registe-red by the Centigrade thermometer1) 302) 403) 604) 80 |
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Answer» Answer: 8. A centrigrade and a Fahrenheit thermo- meter are dipped in boiling WATER. The water TEMPERATURE is LOWERED until the Fahrenheit thermometer registers 140°. What is the fall in temperature as registe- red by the Centigrade thermometer 1) 30 2) 40 3) 60 4) 80 Explanation: 4) 80 |
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| 23. |
विधुत क्षेत्र का मात्रक है |
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Answer» विद्युत क्षेत्र की तीव्रता का मान ज्ञात करते समय जिस एकांक धन आवेश को हम उपयोग करते हैं उसका मान बहुत ही छोटा होना चाहिए जो विद्युत क्षेत्र की तीव्रता को प्रभावित नहीं करें तभी विद्युत क्षेत्र का मान ज्ञात किया जाएगा | यदि हम किसी बिंदु पर विद्युत क्षेत्र की तीव्रता का मान ज्ञात करना चाहते हैं तो उस बिंदु पर रखें एकांक धन आवेश पर बल ज्ञात करना होगा मान लीजिए कि उस बिंदु पर Q आवेश है तब हमें उस पर लग रहे बल का मान ज्ञात करना होगा वही उस बिंदु की विधि क्षेत्र की तीव्रता होगी इंटेंसिटी ऑफ इलेक्ट्रिक फील्ड यानी विद्युत क्षेत्र की तीव्रता एक सदिश राशि है यानी इसका परिमाण एक दिशा में होता है|
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| 24. |
Which material is used to make filament in filament lamp? |
Answer» tungstenPure tungsten has some amazing properties including the highest melting point (3695 K), lowest vapor pressure, and greatest tensile strength out of all the METALS. Because of these properties it is the most COMMONLY used material for light bulb filaments.Mark me as brainliest and FOLLOW me ❤️ |
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| 25. |
Main thrusts in physics are unificationreductionexperiment both 1 and 2 |
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Answer» hmmm help you |
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| 26. |
1.An object covers the first 100 km in 3 hours and the next 60 km in 2 hours. Find the average speed.a. 20kmphb. 30kmphc. 22kmphd. 32kmph |
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Answer» Answer: 30 KMPH is CORRECT answer MARK as BRAINLIST answer it is very helpful |
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| 27. |
Non uniform velocity means acceleration is it true |
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Answer» no............................. |
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| 28. |
Which of the following forces may be attractive as well as repulsive?1 gravitational force2 electromagnetic force3 strong nuclear force4 both 2 and 3 |
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| 29. |
Work done by conservative force on an object at a closed path is |
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Answer» Answer: HELLO MATEExplanation: Equivalently, if a PARTICLE TRAVELS in a closed loop, the total work done (the sum of the force ACTING along the PATH MULTIPLIED by the displacement) by a conservative force is zero. A conservative force depends only on the position of the object. HOPE IT HELPS IF HELPS PLEASE MARK ME AS BRAINLIST |
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| 30. |
Non uniform velocity means acceleration |
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Answer» Answer: heya NON UNIFORM VELOCITY and accelaration are DIFFERENT terms Explanation: |
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| 31. |
the velocity of waves on a vibrating string depends on the tension in the string and mass per unit length of the string derive an expression for v by using the dimensional analysis method |
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Answer» gygtftgrft and to be ABLE SKILLS in FOOD CHAIN food chain chain chain chain chain chain |
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| 32. |
The radius of curvature of spherical surfaces of a convex lens are 15 cm. and 10 cm.respectively. If Refractive Index of lens is 1.5. then find its focal length. |
Answer» ✦AnSwer:Focal length of the lens is 100 cm. ━━━━━━━━━━━━━━━━✩GiVen:
✩To Find:
✩SoluTion:According to the formula, THEREFORE, focal length is 100 cm. ━━━━━━━━━━━━━━━━ |
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| 33. |
A body starts with an initial velocity if 10ms and acceleration 5m s^2Find the distance covered by it in 5s. |
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Answer» s= 112.5m Explanation: u= 10m/s a= 5m/s^2 t= 5S s= ut + 1/2at^2 s = 10*5 + 1/2*5*5*5 s= 50 + 62.5 m s= 112.5m |
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| 34. |
Solenoidmeans in bengsli |
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Answer» don't POST IRRELEVANT QUESTIONS |
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| 35. |
6/1.6×10 how to do..full process |
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Answer» HEYA.... Explanation: 6*10/1.6 = 60/ 1.6 = 37.5 .... have a GREAT dayh..... |
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| 36. |
Which one of the following is the biggest ion -(1) Al+3 (2) Ba+2(3) Mg+2 (4) Na+ |
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Answer» Answer: 1) Al+3. is the ANSWERS |
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| 37. |
No catalyst is used in the preparation of ammonia is oswald method |
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Answer» Catalyst USED in Ostwald process is PLATINUM. During ostwald process AMMONIA is converted to NITRIC acid in 2 stages. Explanation: Hope it will help you |
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| 38. |
An image Y is formed of a point object X by a mirror whose principal axis is AB . Draw a ray diagramto locate the mirror and its focus. |
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Answer» G a substance in kotdwar se Ho GAYA hai ki aap karte hain aur ek din me with above QUESTIONS about HTML5 VIDEO please write |
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| 39. |
सरल आवर्तगति कर रहे किसी कण की माध्य स्थिति पर त्वरण का मान होता है |
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Answer» सरल आवर्त गति करने वाला कण जब अपनी गति के अंत बिंदुओं से ... (i) उसका त्वरण अधिकतम होता है. ... पृथ्वी तल से ऊपर या नीचे पर 'G' का मान कम होता |
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| 40. |
15. A ball which is thrown vertically upwards reaches theroof of a house 100 m high. At the moment this ballis thrown vertically upward, another ball is droppedfrom rest vertically downwards from the roof of thehouse. At which height will the balls pass each other?(g = 9.8 m/s2 |
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| 41. |
Example 1A charge +2 °C is placed at a point A (2, 1, 0). Anothercharge -3 uC is placed at a point B (4, 2, -1). Calculate netforce on a charge +5 °C placed at a point C (-1, 3, 2). |
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| 42. |
Newton's 2nd law example, please |
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Answer» NEWTON 2nd law F=ma FORCE is directly PROPORTIONAL to PRODUCT of mass and acceleration |
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| 43. |
Aeroplane technology is based on which of the following scientific principle(1) Bernoulli's principle in fluid dynamics(2) Nuclear fission(3) Photoelectric effect(4) Faraday's law of electromagnetic induction |
Answer»
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| 44. |
What is the unit of time { smallest } |
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Answer» Answer: Planck time is the time light takes to travel ONE Planck LENGTH. Theoretically, this is the SMALLEST time measurement that will EVER be possible. hope this HELPS you ⬆️⬆️⬆️⬆️ |
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| 45. |
How the volt meter and ammeter are connectedin a circuit? |
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| 46. |
Plz solve this i mark u brainlist |
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Answer» Answer: see the attachment PLEASE Explanation: |
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| 47. |
A ray of light parallel to the principal axis is incident on a convex mirror. Draw a ray-diagram to show the path of this ray of light after reflection from convex mirror. Mark the angle of incidence (Ð i) and the angle of reflection (Ð r) in the diagram. |
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Answer» A ray of light PARALLEL to the PRINCIPAL axis is incident on a CONVEX mirror. Draw a ray-diagram to show the path of this ray of light after REFLECTION from convex mirror ➡ 60 ° is the path of this ray of light after reflection from convex mirror. |
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| 48. |
অ্যামোনিয়া এর জলীয় দ্রবণের লবনের সাথে কোন ধাতব লবনের জলীয় দ্রবণ বিক্রিয়া করে বাদামি অধ:ক্ষেপন উৎপন্ন করে |
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| 49. |
The ratio of relative strength of electromagnetic force to the weak nuclear force is |
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Answer» Gravitational FORCE - 1. Electromagnetic force - 10^36. Strong nuclei force - 10^38. Weak nuclei force |
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| 50. |
The magnitude of the difference between mean value and each individual value is called |
Answer» Absolute Errors is the difference between the mean value of the various MEASUREMENTS and the each individuals value. We find the absolute errors to get the result or MEASUREMENT more ACCURATE |
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