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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. |
If the angle of incidence of a ray light falling on the glass surface30degree and the angle of refraction is 19 degree.What is the refrative index of glass? |
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Answer» Sorry-Jay FOLLOWME............. |
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| 2. |
ಕಂಠಭಾಗದಲ್ಲಿ ಹುಟ್ಟುವ ಅಕ್ಷರಗಳು ಯಾವುವು |
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Answer» ಅಆಈಇಉಊಋಎಏಐಒಓಔಂಃಕಖಗಘಙಚಛಜಝಞಟಠಡಢಣತಥದಧನಪಫಬಭಮಯರಲವಶಷಸಹಳ |
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| 4. |
On the Banked road, Vehical has a friction less motion with maximum safety speed is |
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Answer» Answer: |
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| 5. |
The bolling point of sea water is grater than 100° C . why |
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Answer» Answer: Pure water boils at 100 DEGREES Celsius under normal atmospheric pressure, but the Dead Sea surface is so low (more than 400 meters below "sea LEVEL") that water boils at about 101 degrees there. It does boil at a higher temperature because of the high amounts of non-volatile solids. Explanation: wish you a cushy LIFE |
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| 6. |
A vector which gives the position of a particle at a point with respect to the origin of a chosen coordinate system is called the |
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Answer» Displacement vector vector from the INITIAL position to a final position on a trajectory of a PARTICLE position vector vector from the origin of a chosen COORDINATE SYSTEM to the position of a particle in two- or three-dimensional space velocity vector vector that GIVES the instantaneous speed and direction. |
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| 7. |
18. In each of the following a force, F is acting on an object ofmass, m The direction of displacement is from west to eastmoving ashown by the longer arrow. Observe the diagrams carefullyand state whether the work done by the force is negative,positive or zero.19. Soni says that the acceleration in an object could be zeroeven when several forces are acting on it. Do you agree withher? Why?20. Find the energy in kW h consumed in 10 hours by fourdevices of power 500 W each.21. A freely falling object eventually stops on reaching theground. What happenes to its kinetic energy? |
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| 8. |
Kinetic energy of a body is increased by 300%. Find the percentage increase in momentum. |
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Answer» Explanation: 11th Physics Work, ENERGY and Power Kinetic Energy Kinetic energy of a particl... PHYSICS Kinetic energy of a PARTICLE is INCREASED by 300%. Find the percentage increase in its momentum. MEDIUM Share Study later ANSWER When the kinetic energy increase by 300 %, new kinetic energy will be K ′ =K+300 K K ′ =K+3K k;=4K We know that K.E. K = 2m p 2
(m is the mass OBJECT ) Therefore, eq. (i) become 2m p ′ 2
=4 2m p 2
p ′ 2=4p 2
p ′
4
p 2
p ′ =2P (ii) % change in mornentum = p p ′ −p
×100 = p 2P−p
×100 % = 1×100=100 % Therefore, increases in momentum is 100 % |
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| 9. |
A)5) 1 mole of an ideal gas is kept in a cylinder with a movable frictionless andmassless piston at pressure of 1.0mPa, and temperature 27°C. It is then expanded tilits volume is doubled. How much work is done if the expansion is isobaric?a) 49 kJb) 4.9 kJc) 490 kJd) 0.49 k |
Answer» Correct Question :2 mole of an ideal gas is KEPT in a cylinder with a movable frictionless and massless piston at pressure of 1.0mPa, and temperature 27°C its volume is doubled. How much work is done if the expansion is isobaric ? Answer :★ Work done in isobaric process is given by
W denotes work done P denotes pressure ∆V denotes change in volume ★ Ideal gas equation :
Temperature = 27°C = 300K ➝ 10‾³ × V = 2 × 8.314 × 300 ➝ V = 4988.4 × 10³ m³ ..... (i) Now work done in expansion ; ➝ W = P (V₂ - V₁) ATQ : V₂ = 2V ➝ W = P (2V - V) ➝ W = P × V From equation (i) ➝ W = 10‾³ × (4988.4 × 10³) ➝ W = 4.9 kJ ∴ (B) is the correct answer! ★ Additional Information : |
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| 10. |
Body of mass 1 kg is rotating in a circular path of radius 1 m with constant velocity of 5 rev/sec. What is the work done in one complete revolution? |
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Answer» ACCORDING to WORK energy theorem, ΔK.E.=W and here work is DONE by the gravitational force. ⇒ΔK.E.=W=mg (2r)=1×10×2(1)=20 J |
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| 11. |
Through a conducted 10 electrons flow per second.estimate current? |
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Answer» We KNOW that I=Q/t Q=10 7 ×1.6×10 −19 which is flowing per SECOND in a conducting wire HENCE I=1.6×10 −12 A |
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| 12. |
What are the precautions to be taken while doing limiting force activity |
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Answer» Hola!!! ☺ _____________________________ # Lab activity on Find the limiting force that can be borne by a string _____________________________ here is your answer ☺ _____________________________ LAB ACTIVITY AIM:- To find the limiting force that can be Borne by a string. MATERIALS REQUIRED:- string balance, weights, light strings, weight HANGER. PROCEDURE:- Arrange the system as shown in the figure but some small weights like 50 gram on the weight hanger I know the readings of the spring balance. Now, add some more ways to the Hanger and know the readings of the spring balance. do the same tell the string is broken. no the reading of the balance in the following table when the string is broken. TABLE:- S.NO | TYPE OF STRING | LIMITING FORCE 1. COPPER. 15 N 2. ZINC. 12 N 3. ALUMINIUM. 8 N OBSERVATION:- The limiting force of copper is 15 N, zinc is 12 N and Aluminium is 8 N . CONCLUSION:- The different strings have difference in their limiting forces values. see the attachment for diagram _______________________________ hope it helps you ☺ _______________________________ thank you for giving me this wonderful opportunity ☺ ______________________________ REGARDS ☺ PIPI ☺ LEADER OF BRAINLY STARS ☺ Explanation: By performing an activity:1. Take a spring balance and HANG to horizontal rod.2. take a light string for which the breaking strength to be found.3. one end of the string is attached to the spring balance and the other end is attached to a weight hanger.4. Put some small weights like 50gms on the weight hanger and note the readings of the spring balance.5. Now add little weight to the hanger and note the readings of the spring balance.6. Do the same until the string is broken.7. Note the reading of the balance when string is broken.8. The reading gives the limiting force that can be born by thread |
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| 13. |
Are the three cars ever on the same point on the road? |
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Answer» I they can't be at same POINT |
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| 14. |
15. Illustrate the law of conservation of energy by discussing theenergy changes which occur when we draw a pendulumeventually come to rest? What happens to its energybob to one side and allow it to oscillate. Why does the bobeventually? Is it a violation of the law of conservation of16. An object of mass, mis moving with a constant velocity, V.How much work should be done on the object in order to bring7. Calculate the work required to be done to stop a car of 1500 kgthe object to rest?energy?moving at a velocity of 60 km/h? |
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Answer» LAW of conservation of MASS mentions that mass can neither be created nor destroyed . |
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| 15. |
Diffrencetiate between distance and displacement |
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Answer» Distance is a scalar quantity that REFERS to "how much ground an object has covered" during its motion. DISPLACEMENT is a vector quantity that refers to "how far out of place an object is"; it is the object's overall CHANGE in POSITION. |
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| 16. |
Please answer correctly otherwise I will report you. |
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Answer» Explanation: because it is RIGHT |
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| 17. |
1.A boy is moving along a square path ABCDA is asshown in figure. If the boy is taken 5 sec time totravel any side of the square, Then find average velocity along A to Baverage velocity along path ABC average velocity along ABCD.Average speed along ABCDA |
Answer» Answer :Time taken by boy to travel any side of the square = 5s ★ Average velocity is DEFINED as the ratio of total displacement to the total time. It is a vector quantity having both magnitude as well as direction SI UNIT : m/s (A) Av. velocity along A to B :
➝ Vav = 5/5 ➝ Vav = 1 m/s (B) Av. velocity along path ABC :
➝ Vav = 5√2/10 ➝ Vav = √2/2 ➝ Vav = 1/√2 m/s (C) Av. velocity along path ABCD : ➝ Vav = 5/15 ➝ Vav = 1/3 ➝ Vav = 0.33 m/s (D) Av. velocity along path ABCDA :
➝ Vav = 0/20 ➝ Vav = 0 m/s |
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| 18. |
In which ways,¡ wastage of water occurs when people what are the plants? |
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Answer» Answer: SUN is over head the sun absorbs water and the PLANTS don't get water so we ... |
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| 19. |
Two towns A and B are connected by a regular bus service with a bus leaeither direction every T minutes. A man cycling with a speed of 20 kmdirection A to B notices that a bus goes past him every 18 min in the direhis motion, and every 6 min in the opposite direction. What is the periodbus service and with what speed (assumed constant) do the bu |
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Answer» Two towns A and B are connected by a regular bus service with a bus LEAVING in either direction every T MIN A man cycling with a speed of 20kmh-1 in the direction A to B notices that a bus goes PAST him every 18min in the direction of his motion, and every 6min in the OPPOSITE direction. |
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| 20. |
An object is allowed to fall form height of 600 meter with what velocity |
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| 21. |
मोस्ट इलेक्ट्रॉनिक नेगेटिव एलिमेंट इज |
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Answer» Answer: 1368 Explanation: जब हम सुबह उठते हैं, तो हम देखते हैं कि सूरज पीला है। जैसे-जैसे दिन बढ़ता है, सूर्य का रंग नारंगी हो जाता है। और दिन के अंत में, सूरज उज्ज्वल लाल हो गया। क्या हमने कभी सूर्य में रंग परिवर्तन के बारे में सोचा है, ऐसा क्यों है? सूर्य वास्तव में कोई भी रंग है - लाल, पीला या नारंगी, या कोई अन्य रंग! हम जानते हैं कि सूर्य एक तारा है, और सभी तारों का रंग कुछ है। रंग लाल विशालकाय, लाल बौना, नीला विशालकाय, सुपर विशालकाय आदि हैं। एक तारा किस रंग का होगा यह उसके तापमान पर निर्भर करता है। फोटॉन एक तारे से बाहर आते हैं और अंतरिक्ष में खो जाते हैं, इसलिए फोटॉनों से निकलने वाली ऊर्जा की मात्रा बदलती रहती है। यही कारण है कि एक तारे को एक ही समय में अवरक्त, पराबैंगनी, लाल या नीली रोशनी विकिरण करते देखा जा सकता है। यहां तक कि एक्स और गामा किरणें भी हो सकती हैं। यदि किसी तारे का तापमान पैंतीस हजार केल्विन से नीचे है, तो उसका रंग लाल होगा। क्योंकि तब हमारे दृश्य प्रकाश स्पेक्ट्रम में अन्य रंगों की तुलना में उच्च दर पर लाल फोटोन उत्सर्जित होते हैं। फिर, यदि किसी तारे का तापमान केल्विन से दस हजार से अधिक है, तो वह नीला होगा। क्योंकि पहले की तरह, इस बार केवल नीले फोटोन ही अधिक उत्सर्जित होते हैं। हमारे सूरज का तापमान लगभग छह हजार केल्विन है। इस तापमान पर सितारे आमतौर पर सफेद होते हैं। उस स्थिति में सूर्य का वास्तविक रंग सफेद है। हां, सूरज वास्तव में सफेद है। कारण बहुत सरल है। इस तापमान पर, सभी रंगों के फोटॉन एक ही समय में उत्सर्जित होते हैं। और सभी रंगों का योग सफेद है। यदि हम अंतरिक्ष में जा सकते हैं और सूर्य को देख सकते हैं, तो हम देखेंगे कि सूर्य वास्तव में बिल्कुल सफेद है। सूर्य और सूर्य के प्रकाश का रंग सफेद है। फिर मैं सूरज को लाल, पीले या नारंगी रंग में क्यों देखता हूं? इसकी वजह है वातावरण में सूरज की रोशनी का बिखरना। छोटे तरंग दैर्ध्य की नीले और बैंगनी प्रकाश किरणों को हटा दिया जाता है। जब सूर्य से प्रकाश स्पेक्ट्रम के इन दो रंगों को हटा दिया जाता है, तो यह पीले रंग की तरह हो जाता है। हम फिर सूरज को पीले रंग में देखते हैं। ऐसा अन्य रंगों के साथ भी होता है। इस प्रकार जब सूर्य वायुमंडल की विभिन्न परतों के माध्यम से पृथ्वी में प्रवेश करता है, तो यह पीले, नारंगी या मैजेंटा में रंग बदलता है। फिर सवाल यह है कि सूर्योदय और सूर्यास्त के समय सूरज लाल क्यों दिखता है? धूल और सूर्योदय और सूर्यास्त के दौरान तैरने वाली हवा के अन्य तत्व सूर्य के प्रकाश के नीले किनारे के कम तरंग दैर्ध्य रंग को बिखेरते हैं और लाल किनारे के रंग तरंगदैर्ध्य को कम बिखेरते हैं। नतीजतन, सूरज लाल दिखता है। |
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| 22. |
Hey genius!Answer this question↓A solid is in shape of cone standing on hemisphere with both radii being equal to 1cm and height of cone is equal to its radius .find the volume of solid in terms of π |
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Answer» A solid is in shape of cone standing on hemisphere with both radii being equal to 1cm and height of cone is equal to its RADIUS .find the volume of solid in terms of π. Given: Radius = 1cm Height = 1cm To find: Volume of solid Solution: Here, R= 1cm H = 1cm Volume of solid= volume of conical part+volume of hemispherical point Volume of cone = 1/3πr^3 Volume of hemisphere = 2/3πr^3 Volume of solid = 1/3π(l)^2[1+2(1)] =>1/3π × 1 × 3 => π cm^3. |
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| 23. |
Which is SI unit of free fall and why?? |
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Answer» Answer: Its unit in the INTERNATIONAL System (SI) is the second (s) H: Height from which the body falls. It is a measurement of LENGTH and therefore is MEASURED in METERS. g: Value of the gravitational ACCELERATION which on Earth surface can be considered equal to 9.8 m/s. |
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| 24. |
. In mutual induction the induced current does not directly affect the……….. current. |
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Answer» Answer: |
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| 25. |
What are rod shaped and cone shaped cells? How do they help us in seeing colour ? |
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Answer» Answer: Cones are less sensitive to light than the ROD cells in the retina (which SUPPORT vision at low light LEVELS), but allow the perception of color. ... Each cone is therefore sensitive to VISIBLE wavelengths of light that correspond to short-wavelength, medium-wavelength and longer-wavelength light. Explanation: please FOLLOW me my dear friend |
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| 26. |
If radius of spher is 7mm find the area |
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Answer» Answer: the correct answer is 6.16 Explanation: S = now convert mm into cm <U>Formula = divide the length value by 10 7 mm = 0.7 cm 4× 22/7 × 0.49 6.16 HOPE THIS HELPS U :) PLEASE MARK ME AS A BRAINLIEST... |
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| 27. |
The magnetic field produced due to current carrying conductor is……….. to the current flowing through it. |
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Answer» wuhejehrhrhrubejdirhrhrjrijdhbrurbebdjhdbrjesjhebdjdbdjdhbfidhehdhrdjdunekdirhndishrh |
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| 29. |
DEFINE THE FOLLOWING............... |
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Answer» two Explanation: this is a CORRECT answer PLEASE MARK AS BRAINLIEST |
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| 30. |
Napthalene balls disappear with time without leaving solid |
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| 31. |
Discuss the importance of earthing? |
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Answer» Answer: Earthing is an important COMPONENT of electrical systems because of the following reasons: It keeps people safe by preventing electric shocks. It prevents damage to electrical appliances and devices by preventing excessive CURRENT from running through the circuit. Importance of Earthing: The earthing protects the personnel from the shortcircuit current. The earthing provides the easiest path to the flow of shortcircuit current EVEN after the failure of the INSULATION. The earthing protects the apparatus and personnel from the high voltage SURGES and lightning discharge. Hope this helps you |
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| 32. |
3) Find the derivatives of the following: (i) (x3 – 3x2 + 4) (4x5 + x2 - 1)(ii)X-3 |
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Answer» ✏️ KINDLY REFER the ATTACHMENT provided above, your solution is up there! ________________________________________I hope this helps! :) |
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| 33. |
Pls tell me why is there the change in the value of v?....why does it change if we use rod instead of string.....DONT SPAM |
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Answer» In case of rod:- 1st method Velocity at the top of circle(U)=0 length covered when it reaches at bottommost POINT=2L acceleration=g final velocity=v(say) From Newton's third equation,we can write v^2=u^2+2as v^2=0+2×g×2l v=√4gl 2nd method At the top point, Velocity of block will be zero,and potential energy will be at it's maximum using work energy theorem,we can write mv^2/2 =mg×2l v=√4gl In case of string:- Required velocity at the top(to complete the circle)=√gl(minimum) Velocity at the bottom=v(say) acceleration=g distance to travel=2l using third equation of MOTION we get v^2=(√gl)^2+2×g×2l v=√5gl Doubts:- 1) Why velocity at top(in case of string) is not taken as zero? Ans:-String is weak(not compressible),and if at the top, velocity of block will become zero then the block will fall directly at the bottom without completing the circle. 2)Why √gl is PARTICULARLY taken? Ans:-It is mathematically proved that,√5gl is the minimum velocity required to give to the block attached by a string to complete the circle .So at the top velocity will be √gl |
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| 34. |
II. Write the definition:1. Pneumonia-2. Influenza-3. Hepatitis-4. Antibiotics-5. Pollution- |
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Answer» pheumonia is a blood insufficient disease. hepatitis is a VIRUS disease influenza is a lungs disease antibiotic is a component that help for health pollution is HARMFUL for ENVIRONMENT |
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| 35. |
On what factor does the resistance ofconductordepend? |
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Answer» Answer: The RESISTANCE of a conductor DEPENDS on the CROSS sectional area of the conductor, the length of the conductor, and its resistivity. It is important to note that electrical conductivity and resistivity are inversely proportional, meaning that the more conductive SOMETHING is the less RESISTIVE it is. |
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| 36. |
The Product Of Frequency & Time Period is equal to; (A). 2 (B). 3 (C). 0 (D). 1 |
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Answer» the CORRECT answer is 1 option D. 1 PLEASE MARK ME AS A BRAINLIEST... |
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| 37. |
Give two examples each for a contact force at a distance |
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Answer» Explanation: These are Gravitational FORCE (weight of a body), magnetic force. Whereas contact force is the force that acts on a body by physically coming in contact with it. For example Force of friction, Tension force, Air RESISTANCE force ETC. |
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| 38. |
A racing car has a uniform acceleration of 2m/sec square.what distance will it covers in 8sec after start |
Answer» Answer :-Given :-
To find :-
Solution :-
Substituting the value in 2ND equation of motion :- |
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| 40. |
С.imp10 What is Physics?fry Raman? |
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Answer» Answer: Physics is a branch of science. It is one of the most FUNDAMENTAL scientific disciplines. The MAIN goal of physics is to explain how things move in space and time and understand how the universe behaves. It studies matter, FORCES and their effects. HOPE this helps. Please mark me brainliest. |
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| 41. |
What do you understand by gravitation acceleration |
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Answer» Answer: In physics, gravitational ACCELERATION is the FREE fall acceleration of an object in vacuum — without any drag. This is the steady GAIN in speed caused exclusively by the force of gravitational attraction. PLEASE MARK IT AS BRAINLIEST AND FOLLOW ME. |
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| 42. |
A golf ball accelerates of a tee at changing its velocity from to .How long did the golf ball accelerates? |
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Answer» Given A golf ball accelerates off a TEE at 15 m/s² changing its velocity from 0 m/s to 50 m/s down To Find How LONG did it take the golf ball to accelerate Solution We know that Equation of motion Here u = initial velocity v = final velocity a = acceleration t = time Units u = metres per second (m/s) v = metres per second (m/s) a = metres per second squared (m/s²) t = seconds (s) According to the question We are ASKED to find how long did it take the golf ball to accelerate Therefore We must find "t" Hence Given that A golf ball accelerates off a tee at 15 m/s² changing its velocity from 0 m/s to 50 m/s down Hence u = 0 m/s v = 50 m/s a = 15 m/s² Substituting the values We get On further simplification We get Therefore Hence
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| 43. |
10. Area of acceleration time graph1 pointgives :rate of change of acceleration with time |
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Answer» Answer: helo GUYS its your answer Explanation: The SLOPE of the line on these graphs is equal to the acceleration of the ... 1-D KINEMATICS - Lesson 4 - Describing Motion with Velocity vs. |
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| 44. |
What will be the effect on time of flight of a projectile when its initial veocity is increased, keeping the angle of projection same. |
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Answer» Answer: Explanation: ACCORDING to this FORMULA the range of PROJECTILE is directly propotional to the square of the initial velocity. So when the initial velocity is doubled the range of projectile becomes four times as per the formula where as the angle of projectile remains UN changed. Hope it helps |
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| 45. |
If the textbook weighs 19.6 newtons on Venus, What is the strength of gravityon Venus? |
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| 46. |
TimeanotherA stone is dropped from the top of towerof height 200m, At theprojected verticallyupwards from groundvelocityof 40m/s Calculate whenstones will meet ?stone iswithand where the |
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Answer»
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. . Related Video View All A stone is dropped from the top of a high tower. At the same time another stone is projected vertically upwards from the ground with a speed of . The two stones will cross each other after a time play2:16 like-icon 53.5k LIKES view-icon 20.8k VIEWS share-icon 20.8k SHARES A stone is allowed to fall from the top of a tower 100m high and at the same time another stone is projected vertically upwards from the ground with a velocity of . Calculate when and where the two stone will meet. play5:13 like-icon 47.0k LIKES view-icon 64.3k VIEWS share-icon 64.3k SHARES view-icon 38.2k VIEWS share-icon 38.2k SHARES One stone is dropped from a tower from rest and simultaneously another stone is projected vertically upwards from the tower with some initial velocity. The graph of DISTANCE (s) between the two stones varies with time (t) as (before EITHER stone HITS the ground). play2:44 like-icon 125.8k LIKES view-icon 35.3k VIEWS share-icon 35.3k SHARES A stone is dropped fp
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| 47. |
the resultant of two concurrent forces is 600N and the angle between the forces is 90°the resultant makes angle 20° width one of the forces find the magnitude of each other |
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Answer» Explanation: The moment of extinction is generally considered to be the death of the LAST INDIVIDUAL of the species, although the capacity to BREED and RECOVER may have been lost before this point. |
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| 48. |
1/x-1/(2-x)=7/2x-5/3(1-x) please solve the question please Didi,dost,and girlfriend etc..urgent hai |
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Answer» HI.......................... |
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| 49. |
Name the electromagnetic radiation having the wavelength range from 10-1 m to 10-3 m |
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Answer» INFRARED is the answer FOLLOW me |
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| 50. |
What is the effect of time period on force applied according to newton's second law? |
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Answer» Answer: By the END of this SECTION, you will be ABLE to: Define net force, external force, and system. Understand NEWTON’s second law of motion. Apply Newton’s second law to determine the weight of an object. |
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