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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. |
The area under a velocity of the object with time is called? |
| Answer» MAY be ACCELERATION.... FRIEND MARK me as BRAINLIEST | |
| 2. |
Solve the above attached problem |
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Answer» this is what you WANT then i can SEND the REST TWO QUESTIONS. |
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| 3. |
On concave lens the focal length is 15cm and the image is formed 10cm then where the object is there |
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Answer» The COST of PRODUCTION of ELECTRICITY is LESS than in KARNATAKA. WhyExplanation: |
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| 4. |
what are the Sign of conventions to be followed for the applications of refraction at curved surfaces and through lens?write the sign convention for U,V,R1,R2 for concavo-convex lens |
| Answer» EXPLANATION:REFER to the PHOTOS. ..and MARK me as BRAINLIEST | |
| 5. |
Why is the graph of static friction a straight line? |
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Answer» the graph between the force F and the FRICTION force f is shown in figure.From this we can say that the graph is a STRAIGHT line of slope 450 for SMALL F and a ...EXPLANATION: |
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| 6. |
Find the velocity of a body when it had travelled 4m if initially it was at rest. (a=x^2) Here a=acceleration and x=displacement |
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Answer» Explanation:ACCELERATION, A= X² [ WHERE X IS THE DISPLACEMENT]INTEGRATING ACCELERATION WE GET VELOCITYV = 2 XVELOCITY AT 4 M ,V= 2*4V= 8 M/S.HOPE THIS HELPS. |
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| 7. |
Combination of two identical capacitor a resistor R and a DC voltage source of voltage 6V is used in an experiment on a (C-R) circuit. It is found that a parallel combination of the capacitor the time in which the voltage of the fully charged combination reduces to half its original voltage is 10 second. For series combination, the time needed for reducing the voltage of the fully charged series combination by half is |
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Answer» For CR circuit, during charging the voltage across capacitor at instant t is V=V 0 (1−e −t/CR )According to question, 2V 0 =V 0 (1−e −t/CR )or e t/CR =2⇒t=CRln2For parallel grouping , equivalent capacitance , C P =C+C=2Cnow time for half voltage , t P =C P Rln2=2CRln2For series grouping , equivalent capacitance , C S = C+CCC =C/2now time for half voltage , t S =C S Rln2=(C/2)Rln2∴ t P t S = 41 ⇒t S = 41 ×10=2.5s as t P =10ssolutionJanuary 17, 2020avatarTopprSHARESolve related QuestionsInitially the switch is in position 1 for a LONG time. At t=0, the switch is moved from 1 to 2. Obtain expressions for V C and V R for t > 01 Verified AnswerWhat is the value of V 2 (potential difference across R 2 ) at t=0 and t=∞?1 Verified AnswerVIEW MORERevise with ConceptsRC CircuitsEXAMPLEDEFINITIONSFORMULAES20,000+Learning videos8,000+Fun stories10,000+Fundamental concepts8,00,000+Homework QuestionsLearn with VideosDifferential equations of RC circuit while charging - IDifferential equations of RC circuit while charging - I14 minDifferential equations of RC circuit while charging - IIDifferential equations of RC circuit while charging - II7 minVIEW MOREQuick summary with StoriesTime constant2 mins readDifferential Equations of RC circuit while Charging I3 mins readVIEW MOREBROWSE BYClassesBoardsExamsMODULESOnline ClassesMock TestsAdaptive PracticeLive DoubtsStay upto date with our Newsletter!Stay informed, stay AHEAD. Be a topperYour email addressAbout UsBrand ResourcesPressCustomer StoriesJobsEducatorsFellowshipLearning PlanetGuidesBlogBytesNewsTerms of ServicePrivacy PolicyContact UsFAQsGoogle PlayApp Store |
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| 8. |
What is the biggest energy source on the surface on the earth |
| Answer» SUN's rays is the BIGGEST energy SOURCE on the earth | |
| 9. |
Two identical solid spheres are placed at a separation. A point mass m is moved from one sphere to the other as shown Then the potential energy of m will |
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Answer» ential energy m will first increase, then it will DECREASE as the distance between two solid SPHERES decreases. Explanation: Potential energy is stored energy i.e potential of any OBJECT to transmit energy to perform an activity. This gives rise to kinetic energy. A rubber band is the perfect example of this. This potential energy can be found out using the FORMULA −GMm/(R−x)−Gm(M−m)/x−GM(M−m)/R. |
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| 10. |
Power of a lens is -2.0D find the nature and focal length of the lens |
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Answer» f a lens is -2D, NEGATIVE SIGN INDICATES it is a Concave lens. FOCAL length (in meters)=1/power of the lens, thus focal length=1/2=0.5m=50cm |
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| 11. |
Two plane mirrors are at an angle of 70 with each other . If a ray parallel to mirror M1 is incident on mirror M2, What angle does the outgoing reflected ray make with the surface of mirror M1. Pls pls Answer Tomorrow online Exam |
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Answer» hey I thought ANSWER is 70 degreesExplanation: as the RAY i is parallel to the M1 mirror which is at 70 degrees and by law the angle of incident ray =angle of reflected ray |
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| 12. |
An uncharged metal sphere,A is on an insulated base. A second sphere B of the same shape, size and material carrying a charge +Q is brought into contact with sphere A. a)Describe what happens to charges on sphere A and B as they are brought into contact.b) If we now remove sphere B, and place it far away, what is the charge on sphere A. c) how is this charge(if any) distributed? |
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Answer» ask google for this informationExplanation:PLEASE MARK it as BRAINLIEST answer I THOUGHT it would be HELPFUL for you |
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| 14. |
Pls answer question find the equivalent resistance a and b |
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Answer» R/3 is the ansExplanation:take potentials at the points first point to be A and next point to be B next to be A the last is B[points num TAKEN from left to right ] now reconstruct the SYTEM so that u will get 3 PARALLEL resistorsReff in parallel =R/n[n =NUMBER of resistors]hence ans is R/3HOPE U UNDERSTOOD WELLTHANK U |
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| 15. |
Light can not be measured by a) fermi. b)debye. c) micron d) light year |
| Answer» LIGHT yearmark as BRAINLIST | |
| 16. |
A bus traveling at 4.8 ms-1 decelerates at 2.4 ms-2. calculate the time taken. |
| Answer» EXPLANATION:INITIAL VELOCTY ,U = 4.8 M/SFINAL VELOCITY , V = 0 M/S DECELERATION = - 2.4 M/S²TIME TAKEN =?WE KNOW THAT ,V = U+AT0 = 4.8 - 2.4*-T2.4 T = 4.8 T = 4 SECONDS . HOPE THIS HELPS. | |
| 17. |
Compare the kinetic energy in the different states of matter |
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Answer» All particles have energy, but the energy VARIES DEPENDING on the temperature the sample of MATTER is in. This in turn determines whether the substance exists in the SOLID, liquid, or gaseous STATE. Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy.HOPE IT HELPS !!!!PLEASE BRAINLIEAST |
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| 18. |
Write an activity to show that liquid exerts pressure at equal depth. |
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Answer» Your ANSWER is-Explanation:Take a plastic bottle .Then draw a STRAIGHT line on the bottom HALF of the bottle(the line should go around).Then take a needle or something and make 4 hole on that line equally distanced from each other.Fill the bottle with water and make observations.OBSERVATIONS-the water is dripping down from all the holes and the water FLOW is also EQUAL.hence, it proves that water exerts equal pressure at equal depth. |
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| 19. |
At a distance of 3/4th of the total distance from the first point charge the value of the electric field intensity between two point charges is zero. Find the ratio of the magnitude of first and second charge. |
| Answer» | |
| 20. |
A body of mass 100g is revolving in a horizontal circle. If its frequency of rotation is 3.5 r.p.s and radius of circular path is 0.5 m, the angular speed of the body is |
| Answer» ANSWER:Correct answer is 22 rad/sExplanation:n=3.5 R. p. s.ω =2πn =2×π×3.5 =7 ×22/7 which is approximately EQUAL to 22 rad/s. | |
| 21. |
The terminal velocity of a copper ball of radins 2.0 mm faliingthrough a tank of oil at 20oC is6.5 cm s-l. Calculate the viscosityof the oil at 20oC.(Hints : Density of oil is1.5 x103 kg --', density of copperis 8.9 x103 kg m-3.) |
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Answer» of copper BALL, Terminal velocity of copper ball, Density of copper, Density of OIL, Let The expression for terminal velocity,Then, COEFFICIENT of viscosity, |
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| 22. |
What is cornea??PLZ |
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Answer» tion:The CORNEA is the clear front surface of the eye . It LIES DIRECTLY in front of the IRIS and pupil, and it ALLOWS light to enter the eye. Viewed from ... |
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| 23. |
સમાન મૂલ્યના બે બળોના પરિણામીનો વર્ગ એ તેમના મૂલ્યના ગુણાકારના ત્રણ ગણા જેટલો છે. તો તેમની વચ્ચેનો ખૂણો કેટલો |
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Answer» 60°આશા છે કે તે તમને મદદ કરે !!!આગળ એક સારો દિવસ છે!!! |
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| 24. |
What is the difference between derived quality band basic quantity |
| Answer» BASIC QUANTITY can't be derivedwhereasderived quantity is DERIVED from one or TWO FUNDAMENTAL quantity or basic quantity | |
| 25. |
Which of these actions is an example of gravitational force exerted between objects? * surface water evaporating into the atmosphereplanets moving around the Sun in an elliptical patternglaciers melting because of increasing temperaturesa ball rolling on a horizontal surface comes to rest after some time |
| Answer» PLANETS moving AROUND the SUN in an elliptical patternplanetsExplanation:HOPE it will help you | |
| 27. |
Isothermal bulk modulus of air (ideal gas)at NTP is. Give reasons |
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Answer» mal BULK modulus of ELASTICITY of AIR is equal to pressure of air, so, |
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| 28. |
A wood of mass 20 g has density 50 Kg/m^3. Find it’s volume in SI unit |
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Answer» here is your ANSWER EXPLANATION:THANK you |
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| 29. |
Can non living object exert a forces? if yes give two example |
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Answer» MARK AS BRAINLIESTANSWER:yesExplanation:a BOX on table it is extracting all FORCES so,net force is 0a Car on the road is ALSO acting all forces so, net force is 0 it is resthope u can understandPLEASE MARK AS BRAINLIEST |
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| 30. |
Examples of conservative and non conservative forces |
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Answer» mate this is your answer PLEASE please don't forget to MAKE my answer as BRAINLIEST and please FOLLOW me |
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| 31. |
Plz tell this forces question:- |
| Answer» ING to question--FORCE applied on block=100Nexplitting the force in HORIZONTAL and vertical component,,,we can clearly sayFsin45°= vertical component of force=force applied on surface2Fcos45°=horizontal component=force applied on SURFACE 2their ratio=Fsin45°/Fcos45°=sin45°/cos45°=(1/√2)/(1/√2)=1/1=1:1Hence OPTION c is correct | |
| 32. |
A train takes 3.5 hrs to reach station B from station A, and then 4.5 hrs to return from station B to station A. The distance between the 2 stations is 300km. Find the average speed and average velocity of the train? |
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| 33. |
Is a salad example of hetro genous mixture |
| Answer» TION:YES it is a EXAMPLE of HETEROGENOUS mixturethnk me and msrk me as | |
| 34. |
a car is moving in a straight line with speed 18km/h. It is stopped in 5s by applying the brakes. Find (1) the speed of the car in m/s (2)the retardation and (3) the speed of car after 2s of applying the brakes. |
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| 35. |
electric field in a region is given by E=M/x*3i cap then the correct expression for the potential in the region is (assume potential at infinity equal to xero) |
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Answer» 00000000Explanation:MARK as BRILLIANTLIST ANSWER |
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| 36. |
Find the magnitude & direction magnetic field at point, the following cases. |
| Answer» TION:OPTION A. HOPE it HELPS you | |
| 37. |
Potential difference between a and b |
| Answer» 6V......................... | |
| 38. |
discuss the image formation by both sperical lens all possible cases ( draw the ray diagram and mention the characters of image formed) |
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Answer» Gudu MOBILE BILL is use my name is MADHU ki will GET back to you on this one and the same to you and your FAMILY are in my thoughts |
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| 39. |
Which of the objects has the greatest momentum? pea marble basketball cannonball |
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Answer» the momentum of an object VARIOUS DIRECTLY with the SPEED of the object. Two objects of DIFFERENT mass are moving at the same speed the more massive object will have the greatest momentum |
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| 40. |
If a circuit is open |
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Answer» IF A CIRCUIT IS OPEN...... IT MEANS THAT CURRENT IS NOT FLOWING ACROSS THE CITCUIT....i.e THE KEY IS OPEN.....#SAB MOH MAAYA HAI.... |
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| 41. |
State the newton 1st law of motion? |
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Answer» Newton's FIRST Law states that an object will remain at rest or in UNIFORM MOTION in a STRAIGHT LINE unless acted upon by an external force. ... If an object is at rest in one frame of reference, it will appear to be moving in a straight line to an observer in a reference frame which is moving by the objectExplanation:please mark as brainliest |
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| 43. |
The spectrum obtained with grating is called |
| Answer» PRISM SpectrumExplanation: | |
| 45. |
what is certain place the length of a seconds pendulum is 0.992 m. find the length of the pendulum whose time period is 1.2 second at the same place. |
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Answer» haiExplanation:HAJJ and UMRAH PACKAGES to UPDATE the same sir please find attached the same sir please find attached the same sir ☺️☺️ |
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| 46. |
On which factor resolving power of grating depends |
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Answer» where L is LENGHT of the grating and θ the ANGLE under which a SPECIFIC wavelength is observed. It can be seen that for a FIXED length of the grating, the resolution and dispersion of the grating will depend fundamentally on the order of diffraction observed and the total number of grooves or slits.Explanation:PLZ make me as brainliest |
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| 47. |
Why is copper wire not suitable for a potentiometer |
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Answer» tion:Copper wire is not suitable for potentiometer because it has HIGH TEMPERATURE coefficient of resistance and small RESISTIVITY. So even a very small change in temperature can cause a high change in its resistance which will AFFECT the experimental conditions. |
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| 48. |
Define moment of force and write its Sl unit. |
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Answer» of force (OFTEN just moment) is a measure of its tendency to cause a body to rotate about a SPECIFIC point or axis. In this concept the moment arm, the DISTANCE from the axis of rotation, plays an important role. ... The SI UNIT for moment is the newton meter. |
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| 49. |
Name a device that helps to maintain a potential difference across a conductor |
| Answer» SPECTRUM METER is a DEVICE | |
| 50. |
Calculate i total resistance ii total current and voltage across 6 ohm.resistor |
| Answer» TION:The SUM of the currents through each path is equal to the total current that flows from the SOURCE. You can find total resistance in a Parallel circuit with the following FORMULA: 1/Rt = 1/R1 + 1/R2 + 1/R3 +... If one of the parallel paths is broken, current will continue to flow in all the other paths | |