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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2601. |
Assertion: The average and instantaneous velocities havesame value in a uniform motionReason: In uniform motion, the velocity of an objectincreases uniformly |
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Answer» assertion and REASON is true but not the CORRECT EXPLANATION |
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| 2602. |
HEY BRAINLIANS AND MODERATORS❤SOLVE THIS QUESTION❤{IF POSSIBLE SOLVE IT IN PAPER}Include the respective diagram to it and No shortcuts solve it properly ⚠️⛔SPAMMER STAY AWAY FROM THE QUESTION FOR ABOUT 1000 LAKH LIGHT YEARS⛔⚠️THANK YOU |
Answer» QUESTION:A telescope has an OBJECTIVE LENS of focal length 150 cm and an eyepiece of focal length 5 cm. If a 50 m tall tower at a DISTANCE of 1 km is observed through this telescope in normal SETTING, the angle formed by the image of the tower is θ , then θ is close to ANSWER:
GIVEN:
TO FIND:
FORMULA:Magnification from mirror:EXPLANATION:d = 1000 m F = 150 cm f = 50 cm OTHER FORMULA: |
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| 2603. |
A train is running at full speed when breaks are applied. In first minute it travels 8km, and inthe next minute it travels 3km .Initial speed of the train is |
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| 2604. |
Find the differenciation of y=cosx.tanx |
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Answer» COS(x) Explanation: y=cos(x).sin(x)/cos(x) then y=cos(x).sin(x)/cos(x) GET cancelled y=sin(x) then dy/dx=d{sin(x)}/dx =cos(x) |
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| 2605. |
10) Is two balle of some density but different molts andfrom the height of toom, thenwill cometogether on the enthBoth will come late on the earth5 First will come first and second after that9) Secondwill come Arstand first after that |
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Answer» what is ballle? and what is MOLTS? and what is TOOM and what is enth? and what is ARST? and |
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| 2606. |
Correct the following statement and rewrite it. After the second round table conference in 1934 , Gandhiji dissatiafied as the negotiations with ambedkar had largely failed. |
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| 2607. |
प्रश्न-15 कानों के उत्क्रमणीय इंजन का सिद्धांत क्या है? इसके प्रमुख भागों के कार्यसमझाइए। |
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Answer» कार्नों के उत्क्रमणीय सिद्धांत के अनुसार उत्क्रमणीय इंजन की दक्षता का मान अनुत्क्रमणीय इंजन की दक्षता के मान के समान होता है। कार्नों के सिद्धांत के अनुसार ऐसा इंजन जिसमें उत्पन्न पूरी ऊष्मा का इस्तेमाल कार्य के रूप में रूपांतरित करने के लिए किया जाए अर्थात उस इंजन में किसी भी तरह की उष्मा या ऊर्जा का ह्रास ना हो, वह कार्नो के उत्क्रमणीय इंजन का सिद्धांत है। व्यवहारिक रूप से किसी भी इंजन में 100% दक्षता नहीं होती अर्थात उसमें किसी ना किसी रूप में थोड़ी बहुत ऊर्जा की हानि जरूर होती है, इसलिए कार्नों का उत्क्रमणीय इंजन का सिद्धांत एक आदर्श इंजन का सिद्धांत माना गया है जो व्यवहारिक रूप में प्राप्त नहीं किया जा सकता। कार्नो इंजन के चार प्रमुख भाग होते हैं... सिलेंडर व पिस्टन, ऊष्मा स्रोत, सिंक, पूर्ण कुचालक प्लेट।
☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼ |
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| 2608. |
Assertion : The position-time graph of a uniform motionin one dimension of a body can have negative slope.Reason: When the speed of body decreases with time.the position-time graph of the moving body has negativeslope. |
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Answer» Negative slope of position time graph REPRESENTS that the BODY is moving towards the negative direction and if the slope of the graph decrease with time then it represents the decrease in speed i.e. RETARDATION in motion.Sep 14, 2019 |
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| 2609. |
Obtain the minimal POS expression for F = (0,1,2,4,5,6,9, 11, 12, 13, 14, 15) and implement it in NOR logic? |
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| 2610. |
Draw the ray diagrams for the case when the object is placed at pole in concave mirror |
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| 2611. |
When the resultant of forces acting on the body is not zero, what are they called? |
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Answer» they are CALLED as MUSCULAR FORCE
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| 2612. |
Convert the function F = A +B+CA into minterms:Στο 2 4 5 6Ση, Ο, 1, 2, 3, 4, 5, 6, 7Σε 0, 1, 2, 3, 5, 6, 7)ο Στα (1, 2, 3, 4, 5, 6) |
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| 2613. |
Convert the function F= A(A' + B)(C') into maxterms?TM(0,1,3,4,5,6,7)AM(0,1,3,5,6,7)AM(0, 2, 4, 5, 6, 7)AM(0,1,2,3,4,5,7) |
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Answer» Example • Minimize the following Boolean FUNCTION using sum of products (SOP): • f(a,b,C,d) = m(3,7,11,12,13,14,15) abcd 3 0011 7 0111 11 1011 12 1100 13 1101 14 1110 15 1111 a`b`cd a`bcd ab`cd abc`d` abc`d abcd` abcd |
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| 2614. |
A structural steel rod has a radius of 10mm and a lenght of 1m.A 100kn forse stretches it along its lenght calculate stress elongation and strain youngs modules of steel 2.0*10^11 NM^-2 |
Answer» Given:Radius = r = 10 mm = 0.010 m. Length L = 1 m. Tensile Force = F = 100 kN. Young's Modulus = Y = 2.0 &* 10¹¹ Nm⁻² To Find:STRESS elongation and strain YOUNGS modules of steel Solution:Stress (formula) = Force/cross sectional area σ = F / A = 100,000 /(π 0.010²) Pa = 318.309 MPa Y = (F/A) / (ΔL/L) Elongation ΔL = L F / (A Y) = L σ / Y = 1 * 318.309 * 10⁶ / 2.0 * 10¹¹ m = 1.591 mm
PERCENTAGE elongation : ΔL/L * 100 = 0.1591 %
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| 2615. |
Assertion: The speedometer of an automobile measurethe average speed of the automobileReasen : Average velocity is equal to total displacementper total time taken |
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Answer» Assertion is FALSE but reason is correct. And reason is not correct EXPLANATION of assertion. Correct Statements- The speedometer of an automobile measures INSTANTANEOUS speed. Not average speed because it changes all the time and average speed will be shown after some AMOUNT of time and that is not true. |
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| 2616. |
The resistance of metal wire of length 1m is 26 ohm.if diameter of the wire is 0.3mm what will be the resistivity of the metal (note:there's no temperature mentioned,so please give the correct answer)i will follow you |
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Answer» Answer: Explanation: R = ρl /A d/2=r (changing 0.3mm into m) 0.0003/2=r A= πr^2 26= ρ(1)/(22/7*0.0003*0.0003/4) 26*22/7*0.0003*0.0003/4= ρ 1.84*10^(-6) Ωm btw no need to follow just MARK as Brainliest |
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| 2617. |
Too tough try once..... |
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| 2618. |
Assertion: The average velocity of the object over aninterval of time is either smaller than or equal to the averagespeed of the object over the same intervalReason: Velocity is a vector quantity and speed is a scalar quantity |
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Answer» Answer: the AVERAGE velocity is always lesser than or EQUAL to the average speed because.velocity=DISPLACEMENT/time and speed is DISTANCE/time. the displacement is smaller.or equal to the distance it cannot be greater than the distance. |
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| 2619. |
Draw the ray diagrams for the casesa) when the object is placed at poleb) when the object is placed at centre of curvaturec) when the object is placed at focus..in cancave mirror |
Answer» B) is the answer follow me pleaseeee |
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| 2620. |
Arrange the following velocities in increasing order : ( after converting them to S.I unit ) 10m/s , 1 km/ min,18km/h |
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Answer» Answer
Given
To Find
Concept Used 1 km/h = ⁵/₁₈ m/s 1 km = 1000 m 1 h = 60 min = 3600 s 1 min = 60 s Solution
Here , this is ALREADY in SI unit . So , no need to convert . 1 km/m Here this is not in SI unit of velocity . So we need to convert . So ,
18 km/h Here also , velocity is not in SI unit . So we need to convert . So ,
Now , TIME to arrange in ascending order . [ Observe three velocities carefully ]
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| 2621. |
Take a steel tiffin box and open it. Place a mobile phone in it. Make a call to this phone from another phone. Now, close the tiffin box along with the mobile using the lid. Again make a call to the mobile phone in the tiffin box. What do you observe ? What is this phenomenon ? Explain. |
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Answer» Answer: What do you observe? The phone kept inside the TIFFIN box is REPORTED as 'Out of reach.' Explanation: This phenomenon is shielding of electromagnetic WAVES by metal shields also KNOWN as Faraday shielding. |
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| 2622. |
The image of an object placed at 60 cm in front of a lens is obtained on a screen at a distance of 120 cm from it. Find the focal length of lens. What would be the height of the image if object is 5 cm high .draw a ray diagram....plss make a ray diagram also. |
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Answer» You mark him BRANILIST and FOLLOW me and give me a RATE ☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️ |
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| 2623. |
Q coulomb adhaner jonno ekti toritjukto oncholer ekti bindute toritbivober man holo Qx 10^ 11 oi bindute toritprabolyo koto |
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Answer» GOOGLE that's whyvideo |
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| 2624. |
Derive an expression relating acceleration initial velocity final velocity and time |
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Answer» We know Then we can REWRITE this and integrate LHS WRT v and RHS wrt t: |
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| 2625. |
Seminar note on application of law of motion in daily life |
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Answer» Answer: When you keep your pencil box on your table, does that move? No, it doesn’t rather it’s just in its ‘stationary state’. But ever thought that even in its stationary state the box is exerting a type of gravitational force towards the earth. This is a real-life example of Newtons first law of motion. Thinking hard? Don’t have to as Physics has the answer to it, we will walk you through easy ways to understand Newton’s laws of motion. What is Force? Force is a vector quantity that can be described as a physical cause that changes or tend to change the state of motion or the state of rest of an object. Force can be measured in units called Newtons(N), named after the famous scientist Sir Isaac Newton.
LET us now understand few applications of Newton’s laws of Motion. If a body is in a state of rest, it will remain in the state of rest and if it is in the state of motion, it will continue moving in the same direction with the same speed unless an external force is applied on it. This is known as Newton’s first law of motion and also called ‘Law of INERTIA’.
A ball rolling on a horizontal surface keeps on running unless an external force stops it. Similarly, a book kept on a table remains placed at its place unless it is displaced. Newton’s second law of motion The rate of change of momentum of a body is directly proportional to the force applied on it and the change in momentum is in the direction in which force is applied. The application of the second law is always witnessed when we try to make an object move like stopping a moving ball rolling on the floor or pushing a ball to make it move. The force can be derived as: F= Kma (F= force, K= Constant, M= Mass, A= acceleration) K=1 F=ma Often in cricket matches, you have seen the cricketers catching the ball, sportsmen swing their hands backward as they catch the ball as it PROVIDES the ball more time to lose its speed, thereby the second law of motion comes in place. Newton’s third law of motion To every action, there is an equal and opposite reaction. When you exert a force(action) on a wall by pushing the palm of your hands against it you experience a force(reaction) exerted by the wall on your palm. It’s difficult for you to walk on a slippery surface but it’s easy to walk on a rough surface. This is because the horizontal component of the force you exert on the floor for pushing it backwards gets a reaction force from the rough GROUND as what we often refer as friction, but slippery surface lacks this friction. These were a few basic real-life application of Newton’s law of motion. For more information stay updated with BYJU’S. |
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| 2626. |
Figure 1 show a metallic disc with a hole at its centre. Which one of the figures from 2 to 5 schematicallyshows how the disc will appear after it is uniformly heated?Figure 1A) Figure 2Figure 2B) Figure 3Figure 3 Figure 4C) Figure 4Figure 5D) Figure 5 |
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| 2627. |
When is the force experienced by a current carrying conductor placed a magnetic field largest |
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Answer» the force is experianced MAXIMUM when the CONDUCTOR is kept at 90 degree in the field or u can SIMPLY say that when it is placed perpendicular. Explanation: |
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| 2628. |
ਹੱਡੀਆਂ ਵਿੱਚ ਕਿਹੜੇ ਖਣਿਜ ਹੁੰਦੇ ਹਨ। (ਕੈਲਸ਼ੀਅਮ) (ਲੋਹਾ) |
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Answer» calcuim Explanation: MARK me as BRAINLIEST and FOLLOW me PLEASE |
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| 2629. |
Assertion : Position-time graph of a stationary object isa straight line parallel to time axisReason: For a stationary object. position does notchange with time |
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Answer» Assertion : POSITION-time graph of a stationary object is a straight LINE PARALLEL to time axis. Reason : For a stationary object, position does not change with time. If both assertion and reason are TRUE and the reason is the correct explanation of the assertion. |
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| 2630. |
show how would you join three resistors each of resistance 9 ohm so that the equivalent resistance of the combination is a 14.5ohm b6 ohm |
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Answer» x8thugjcxsyfkgks V. peejwhwbkhs |
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| 2631. |
The mathematical expression of Newton's second law of motion states: *1 pointA) F ∝ m(v - u) / tB) F = -FC) F = mv |
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| 2632. |
Can someone please explain this question to me [ Answer (3)] |
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Answer» Answer: infinite Explanation: BCZ if a POINT BECOMES NULL we can see that there will be more vibration than usual i hope it will be correct pls follow me mark my answer as BRAINLIEST |
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| 2633. |
Distance covered by a body from velocity-time graph is1)is denoted by a line parallel to the distance axis at any point on the time axis2)is denoted by a line parallel to the time axis at any point on the distance axis3)equal to the slope of the graph4)area under the graph |
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Answer» Answer: hey BELLA i don't know if you are READING but if yes i want you to know that i also want to talk to you...i also know advay1616 .... pl reply on my question... good day to you i know what he SAID but still can we...... PLEASE i am looking forward |
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| 2634. |
What is phenomenon responsible for colour of water in deep sea reflection dispersion scattering |
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Answer» Answer: Reflection of blue sky on water and blue COLOR of sky is CAUSED due to scattering of blue light of short wavelengths by particles in the earth's atmosphere. hope it HELPS ! |
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| 2635. |
Why is Brownian motion only exhibit by small particles |
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Answer» Its not TRUE that brownian motion is EXHIBITED by only small particles.... Explanation:In large particles the motion in freely suspended LIQUID is zig-zag but is so negligible i.e., it does affect the particle's motion when compared to its large MASS and hence not visible... Please mark as the Brainliest Answer and give thanks to my all Answers. |
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| 2636. |
What is the nature of rust? |
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Answer» Answer: IRON UNDERGOES OXIDATION. this is known as collision Explanation: it forms fine LAYER and it is called rust |
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| 2637. |
Please explain the concept of bi prism in wave optics!!? |
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Answer» Explanation: Definition of biprism. : a triangular prism with vertex angle of nearly 180° used to obtain images of a SINGLE source in observing the INTERFERENCE of light. — called also Fresnel biprism. A Fresnel Biprism is a thin DOUBLE prism placed base to base and have very small REFRACTING angle ( 0.5o). This is equivalent to a single prism with one of its angle nearly 179° and other two of 0.5 o each. The interference is OBSERVED by the division of wave front. |
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| 2638. |
A electric iron draws a current of 3.4ampere from 220 volt supply line what current will this electric iron draw when connected to 110 volt supply line |
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| 2639. |
A truck moves with a speed of 50 km/h for 20 minutes and then with a speed of 70 km/h for the next 20 minutes. Calculate the total distance covered by the truck. |
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Answer» Answer: 0.0133 Explanation: |
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| 2640. |
Lahu gade pranalikai ang kai name |
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Answer» SORRY DEAR I don't UNDERSTAND your QUESTION ... |
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| 2641. |
1 In a coil, which is not connected to an external voltage source, erf is produced. This will be due to:1. The coil being in a time varying magnetic field2. The coil moving in a time varying magnetic field3. The coil moving in a constant magnetic fieldChoose the correct answer from the options given below.O Only 2 & 3B.0 Only 1 & 2O Only 1 & 3D. All 1, 2 & 3 |
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Answer» Answer:only 1 and 2 due to the PHENOMENA of INDUCED EMF due to the VARY of magnetic flux Explanation: |
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| 2642. |
Find the distance traveled by a body in 5 minutes if it travels with a uniform speed of 20 m/s. |
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Answer» speed=20m/s 5 minutes=300s distance=300*20 =6000m =6km hope it HELPS you plz MARK as brainliest plz follow me |
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| 2643. |
Radha can throw a stone 8 newton withthe average velocity of 12m/s. calculate her power. |
Answer» PLZ MARK me as BRAINLIST |
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| 2644. |
I think time travel is not possible, as any object/person who goes in the future/past, would add its mass to the future/past's system, which would violate the Law of Conservation of Mass and Energy. What are your views on it? |
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Answer» Answer: sorry I don't have any TYPE of views on it... because I don't under STAND what you mean by this |
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| 2645. |
Obtain the simplified expression in POS form F = Im(9, 10, 12) + d(3,5,6,7,11,13,14,1617(4 +C)(4+ B + D)(B+C+D)AB+ C +D(A + c)(a + c)(A' + B + C + D)(A + B)(A + B)(B+C + D) |
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Answer» Answer: |
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| 2646. |
A body of weight 1000N sink in water. The weight of the liquid overflowed is 240Na) A body of the same weight as above floats in water.What is it's weight in water?What will be the weight of the water displaced?Who ever gives the I will follow them,like them and I will ratings and also will mark as the Brainlist!!!!!!!! |
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| 2647. |
Assertion : The position-time graph of a uniform motionin one dimension of a body cannot have negative slope.Reason: In one-dimensional motion the position doesnot reverse, so it cannot have a negative slope |
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Answer» YES....,................ |
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| 2648. |
state newton's laws of motion. Use the first law to define force and inertia, and the second law to define acceleration. |
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Answer» Answer: First law In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a FORCE.[2][3] SECOND law In an inertial frame of reference, the vector sum of the forces F on an object is equal to the mass m of that object multiplied by the ACCELERATION a of the object: F = ma. (It is assumed here that the mass m is constant Explanation: |
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| 2649. |
A current of 15A is drawn by a filanal of an electric bulb for 5min find the charges |
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Answer» Answer
Given
To Find
Solution Current , I = 15 A Time , t = 5 min = 5 × 60 s ⇒ Time , t = 300 s We KNOW that , " Current is defined as no. of charges passing through the cross-section AREA of conductor per unit time " More Info
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| 2650. |
A convex lens is made up of two different materials. How many of images does it form? Explain within a neat raydiagram. |
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Answer» Answer: 1. given convex lens is made up of two different materials 2. two different materials have two different refractive indices n1,N2,n3 3. so the given lens have two different focal lengths 4. HENCE it forms two images for the ray diagram. you should just draw a biconvex lens and divide it into two HALVES by drawing a line in the middle. and shade the two halves with different COLOUR
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