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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. |
What do u mean by that MA of a lever is 4 ? I want the short and sweet answer. tell me fast then i will follow u. |
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Answer» Next we come to CALCULATING the mechanical advantage of a lever. To do this, you divide the distance from the fulcrum, the point at which the lever PIVOTS, to the applied FORCE by the distance from the fulcrum to the resistance force. Using this picture, this means DIVIDING distance b by distance a.lever amplifies an input force to provide a greater output force, which is said to provide leverage. The RATIO of the output force to the input force is the mechanical advantage of the lever.Mechanical advantage is defined as the resistance force moved divided by the effort force used. In the lever example above, for example, a person pushing with a force of 30 lb (13.5 kg) was able to move an object that weighed 180 lb (81 kg). |
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| 2. |
The speed of a car as a function of time is shown in the figure above. Find the distance travelled by the car in 8 seconds and its acceleration. |
| Answer» SPEED = DISTANCE / time THEREFORE , 20 = distance / 8DISTANCE = 20/8 = 2.5 mby definition , v = u + attherefore , 20 = 0 + a× 8A= 20/8 = 2.5 m/s | |
| 4. |
Of olaWhat is the colour the third bandcoded resistor of resistance 12 x10 to the power of 3 ohm |
| Answer» REFER to the ATTACHMENT | |
| 5. |
3. An aeroplane flies 400 km due west from city A to city then 300 lom north cast to city C. and finally 100 km north to chHow far is it from city A to D? In what direction must the aeroplhad to return directly to city A from city D? |
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Answer» tion:First thing first: You are flying form point A ( ORIGIN) West 400 km (point B) and the NORTH East 300 km (point C). Then you are GOING North 100 km (point D); Drop a line from point C to line AB, use SIN(45) = x/300, ==> x = 212.1320344 km or 212 km. |
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| 6. |
For how long should a force of 100 N act on a body of 20 kg so that it acquires a velocity of 100 m/s? |
| Answer» TION:the ANSWER will be f=ma100=20 xaa=5 v=u+at100=0+5tt=20 SEC OK FRIEND | |
| 7. |
if mass of block attached with spring is 0.5 kd and spring constant is 5N/m what will be its time period |
| Answer» TION:T=2×3.14root of 0.5÷5 just USE this EQUATION | |
| 8. |
Under What Conditions Would The Speed Of A Body Be Equal To The Magnitude Of Velocity? |
| Answer» EXPLANATION:When an object moves along a straight path WITHOUT change in its direction, the average VELOCITY of an object is EQUAL to its average speed. | |
| 9. |
A man of height 170 cm wants to see his complete image in a plane mirror his eyes are at the height of 160 cm from the ground |
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Answer» To SEE his COMPLETE image he NEEDS a mirror of half the size=85 cmExplanation:Hope this helps..... Please follow me...... |
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| 11. |
Define surface energy obtain the relation between surface energy and surface tension |
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Answer» Thus, the work DONE per unit surface area is. AW=2ldx2Tldx=T. This work is stored in the unit surface area in the FORM of potential energy. This potential energy is called the surface energy. The above relation SHOWS that the surface energy per unit area of a liquid is EQUAL to its surface tension.Explanation:here's the answer PLEASE follow me |
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| 12. |
Does the time period depend on the AMPLITUDE of the pendulum |
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Answer» The period of a pendulum does not depend on the mass of the BALL, but only on the length of the string.With the assumption of small angles, the frequency and period of the pendulum are INDEPENDENT of the initial angular DISPLACEMENT amplitude. A pendulum will have the same period REGARDLESS of its initial angle.Explanation:here's the answer PLEASE follow me |
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| 13. |
Answer the questions 1 to Fill in the blank with corr1) butanone is a four-corbon compound with ____ functional group |
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Answer» The functional group present in butanone is ketone.Answer:KETONEExplanation:Butanone, also known as methyl ethyl ketone, is an organic COMPOUND with the formula CH₃CCH₂CH₃. This colorless LIQUID ketone has a sharp, sweet odor reminiscent of BUTTERSCOTCH and ACETONE. It is produced industrially on a large scale, and also occurs in trace amounts in nature. |
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| 14. |
In figure an ammeter and a resistor of resistance R =4 ohm have been connected to the terminals of the source to form a complete circuit. The emf of the same is 12 v having an internal resistance of 2 ohm. Determine the voltmeter and ammeter reading |
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| 15. |
Ne is dropped from the top of a cliff of height hin second later a sec the same cliff with a vertically downward velocity u. Show that the two stones will reach the bottomcliff together, if gh(u-gn)"gw (211- gn)eys:rahticle moving in a straight line is observed to be at a distance 'a' from a marked point initially, at ace 'b' after an interval of n seconds, to be at a distance 'c' after 2n seconds and at a distance 'd'In seconds. Prove that if the acceleration is uniform, d-a=3(c-b) and that the acceleration is equala-26n? |
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Answer» Explanation:A stone is dropped from the top of a CLIFF of height h. ''n'' SECONDS later, a second stone is projected downwards from the same cliff with a vertically downward velocity u. Show that the two STONES will reach the bottom of the cliff together, if 8h(u-GN)^(2) = gn^(2)(2u - gn)^(2) what can you SAY about the limiting value of ''n'' ? |
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| 16. |
Quantization of charge equation...plz |
| Answer» ATION of charge MEANS the charge on an object is integral multiple of the basic unit of charge (charge on ONE electron) denoted by E. i.e Q=ne where n is some integer. Quantization of charge is counted for microscopic level but not for MACROSCOPIC level.itzDopeGirl | |
| 17. |
How far an object has moved in comparison to where it began is called? Give reasons |
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Answer» I THINK DISPLACEMENTPLEASE FOLLOW ME.... |
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| 18. |
Can a charge of 8×10^-18C be given to a body? |
| Answer» HARGE of be given to a BODY?YesHere,q = CHARGEN = no. of electronse = charge on electronSo,__________________________________★ It become POSSIBLE because the VALUE of n is an positive integar.__________________________________ | |
| 19. |
DOES THE TIME PERIOD DEPEND ON THE AMPLITUDE OF THE PENDULUM? |
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Answer» No .................. |
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| 20. |
Complete the ray diagram and mark the necessary angles |
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Answer» get over this weekend is GOING GOOD so far I haven't heard back to work TODAY or tomorrow if I could get it to be with me in my birthday and the rest is just as bad as the ONE I had a good I just wanted u know that the one I was in my room is the only WAY you do for me too doing good too but it's all in one place and time for the day before yesterday was my last |
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| 21. |
to accelerate a vehicle to 3ms-2 what force will be needed if the mass of the vehicle is equal to 100kg |
| Answer» EXPLANATION: PLS FINE the ATTACHMENT | |
| 22. |
Give the carrective steps for myopia |
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Answer» ses. For most people with myopia, EYEGLASSES are the primary choice for correction. ...CONTACT lenses. ...Ortho-k or CRT. ...Laser procedures. ...Other refractive surgery procedures. ...VISION THERAPY for people with stress-related myopia. |
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| 23. |
Two vehicles with velocities 10 m/s and 8 m/s are moving from same point. Calculate their relative velocity. [a] If they move in the same direction. [b] If they move in the opposite directions. |
| Answer» REFER to the ATTACHMENT | |
| 24. |
Explain the difference between acid and base |
| Answer» TION:AcidIt TURNS LITMUS PAPER redBaseIt turns litmus paper BLUE | |
| 25. |
In figure an ammeter A and a resistor of resistance R =4 ohm have been connected to the terminals of the source to form a complete circuit. The emf of the same is 12 v having an internal resistance of 2 ohm. Determine the voltmeter and ammeter reading |
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| 26. |
What is newton first law of gravitation |
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Answer» Newton's law of universal gravitation is usually STATED as that every particle attracts every other particle in the UNIVERSE with a force which is directly PROPORTIONAL to the PRODUCT of their masses and inversely proportional to the square of the DISTANCE between their centers.HOPE IT HELPS YOU |
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| 27. |
Marks 4x4=16WaterKerosene0.50Ice0.50Read the following table and answer the following QuestionsSubstance Lead Brass Zinc Copper Iron AluminumSpecific heat 0.031 0.092 0.093 0.095 0.115 0.21i) What is the SI unit of Specific heat ?ii) Which metal is best for cooking utensils?iii) Which metal is used to soldering the wires?iv) Write the formula of specific heat of the substance? |
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Answer» its so BORING |
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| 28. |
Resistance in parallel.....the resistance in series. Fill in the blanks |
| Answer» RESISTANCE in PARALLEL is lesser than resistance in seriesExplanation:if it HELPS mark as brainliest | |
| 29. |
What is the magnitude when train runs at 20 m/s and slow down at 1m/a in every second till it stops |
| Answer» COMPLETE your questionsyour QUESTIONS is INCOMPLETE | |
| 30. |
2. Define the following terms in relation to a wave :(a) amplitude, (b) frequency, (c) wavelength, and(d) wave velocity. |
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Answer» its there in the textbook still here u go it copied from textbook think its fineExplanation:The amplitude of a wave refers to the MAXIMUM amount of displacement of a particle on the MEDIUM from its rest position. ... And the length of one such spatial repetition (known as a wave cycle) is the wavelength. The wavelength can be measured as the DISTANCE from crest to crest or from trough to trough.Frequency DESCRIBES the number of waves that pass a fixed place in a given amount of timeWavelength can be DEFINED as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.Image result for wave velocity definition Wave velocity in common usage refers to speed, although, properly, velocity implies both speed and direction. The velocity of a wave is equal to the product of its wavelength and frequency (number of vibrations per second) and is independent of its intensitymark best if it helps |
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| 31. |
What is a easy definition of momentum |
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Answer» i think it MAY help U MARK me as BRAINLIEST |
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| 32. |
An object is kept at 30 cm distance from the concave mirror of focal length 60cm. find the distance from object of concave mirror |
| Answer» HAT - F = 60 cm U = - 30 cm V = ?BY MIRROR'S FORMULA1 / F = 1 / V + 1 / U1 / 60 = 1 / V - 1 / 30 1 / V = 1 / 60 + 1 / 30 = ( 1 + 2 ) / 60 1 / V = 3 / 60 = 1 / 20 V = 20 cm | |
| 33. |
A car travel a distance of 15 km in 20 min. Find the speed of the car in km h-1 and M s-1 |
| Answer» DISTANCE covered /time taken =15000/20*60=12.5m/s =15/(20/60)=45km/hr We should alz focus on the UNITS and should resolving the problem ACCORDINGLY | |
| 34. |
Differentiate between uniform linaear and uniform circular motion |
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Answer» Displacement can NEVER be zero in uniform LINEAR motion WHEREAS may or may be zero in uniform circular motion. The magnitude and DIRECTION of VELOCITY remains the same in uniform linear motion whereas the magnitude of velocity remains the same but its direction continuously changes in uniform circular motion |
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| 35. |
0.50 Read the following table and answer the following QuestionsSubstance Lead Brass Zinc Copper Iron Aluminum KeroseneSpecific heat 0.031 0.092 0.093 0.095 0.115 020.50i) What is the SI uit of Specific heat?ii) Which metal is best for cooking utensils?111) Which metal is used to soldering the wires?iv) Write the formula of specific heat of the substance? |
| Answer» TION:but where is the table.. PLEASE MARK as BRAINLIEST | |
| 36. |
Consider three vectors A=2i+3j-2 B = 5i+nj+k 02-1+2+36If these three vectors are coplanar, then value of n will be(1) 0(2) 12(3) 16(4) 18 |
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| 38. |
A wire of given material having length ' L ' and area of cross - section ' A ' has a resistance of 6 ohm . What should be the resistance of another wire of same material having length 1/3 and are of cross section 3 A ? |
| Answer» 1 ohmExplanation:Resistance = P l/a [ p is constant]For first wire length = l and area of croos section = aResistance = p l/a = 4 ohm [GIVEN]For SECOND wire length = l/2 and area of cross section = 2aResistance = p (l/2) / 2a = p l/4a = p l/a * 1/4 [p l/a = 4 ohm] = 4*1/4 = 1 ohmThe resistance of second wire = 1 ohm | |
| 39. |
Help me out please, its urgent |
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Answer» a and c vectors and multiply by vector B and SOLVE U get urs answer perfectly |
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| 40. |
6. A train accelerates from the rest for time at a constant rate a and then it retards at the constant rate B fo time I, and comes to rest. Find the ratio:7,11, |
| Answer» TION:I can't UNDERSTAND what I had to ANSWER | |
| 41. |
Express the following speed into m/s (a) A uniform speed of 90km/hr(b) A uniform speed of 165 m/minplz give honest answer ☺️ with solution |
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Answer» (a)25 m/s(b)33/12 m/sExplanation:to convert km/h to m/s we have to multiply with 5/18 and,to convert m/s to km/h we have to multiply with 18/5so(a) 90km/h= 90×5/18 m/s = 25 m/s (b) 165m/minhere its given min that means: in 60sec (1min) it TRAVELLS 165m so in 1 sec it will TRAVEL 165/60 = 33/12 mHOPE THIS WILL HELP YOU |
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| 42. |
Right option for this? Will it be “equal in all processes” as workdone is independent of the path followed by the body? |
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| 43. |
, an electric lamp of resistance 20 ohm and conductor of resistance 4 ohm are connected to a 6 volt battery as shown in the circuit calculate the total resistance of the circuit the current through the circuit power off the lamp potential difference across the conducter |
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Answer» SEE MY POST BELOW AND PLS MARK ME AS BRAINLIST.....EXPLANATION: |
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| 44. |
1) connect 2 ohm 3 ohm 6 ohm 12 ohm get result of (i) 13ohm (ii) 3 ohm. 2) two resistance in series gives 9 ohm and in parallel gives 5 ohm find the valuesplease answer these questions......the first one to answer correctly will be marked as brainliest |
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Answer» option:2)EXPLANATION: HOPE IT'S HELP |
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| 45. |
If 5A of current is flowing in a circuit for 10 minutes. Find the charge guys plz solve as soon as possible i will mark as brainlist |
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Answer» I = 5At = 10 MIN = 600 secondsI = Q ÷ TQ = I × tQ = 5 × 600Q = 3000 CThank you ♡ |
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| 47. |
A metal wire of specific resistance 64 x 10-8 ohm m and length 1.98 m has a resistance of 7 ohm.Calculate its radius. |
| Answer» REFER to the ATTACHMENT | |
| 48. |
To accelerate a vehicle to 3ms-2 what force will be needed if the mass of the vehicle is equal to 100kg |
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| 49. |
How can you differentiate between temperature and heat??? |
| Answer» TION:HEATHEAT is the measure of how many MOLECULES are in an OBJECT multiplied by how much ENERGY each molecule possessesTemperatureTemperature is related to how fast the molecules move within the object.pls thank me if it helps | |