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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. |
Take 100ml of water at 90 degrees Celsius and 200ml of water at 60 degrees Celsius and mix the two .what is the temperature of the mixture?a- 70 degrees Celsiusb-7 degrees Celsiusc-80 degrees Celsiusd- 65 degrees Celsius |
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Answer» The temperature of the MIXTURE is 70 degrees Celsius.
HEAT gained by one = heat lost by the other
0.1 x (T-90) x const = 0.2 x (60-T) x const T(0.1) - 9 = 12 - 0.2(T) (0.3)T = 21 T = 21/0.3 = 70 |
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| 2. |
A trolley while going down an inclined plane has an acceleration of 2 cm per second square . What will be its velocity 3 s after the start |
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Answer» CONVERT 2CM to m which is 0.02 so velocity=distance/time v=0.02/3 HOPE it is RIGHT |
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| 3. |
What is the derivation of electrical energy |
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Answer» DERIVE the formula used when computing electrical ENERGY and POWER.Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit ofpower is the watt, one joule per second. PLEASE PLEASE PLEASE MARK ME BRAINILIST |
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| 4. |
The height of your friend is 1.20 m convert it into centimetre and millimetre |
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Answer» Hey there ! •••••••••••°••••••••••• The answer is as FOLLOWS :- Height in METRE (m) = 1.20 m 1 m = 100 cm => 1.20 m = 1.20 x 100 cm = 120 cm 1 cm = 10 mm 1 m = 1000 mm => 1.20 m = 1.20 x 1000 mm = 1200 mm Height in centimetre (cm) = 120 cm Height in millimetre (mm) = 1200 mm ••••••••••••°••••••••••••• Hope it helps :-) |
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| 5. |
Sipping juice with straw is a pull or push |
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Answer» Sipping juice from a STRAW would be a pull. You are sucking up the juice which in return, is PULLING it into your mouth. If you blow air into the straw, that would be a push because you are FORCING air out the other END of the straw.This is why bubbles appear when you push the air out. Make sense? Hope this helped you out mate! :) PLEASE mark as branliest and hit that thanks button! :) |
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| 7. |
Why can camel can move easily on sand in deserts with sinking their feet in the sand as compared to humans ? |
| Answer» CAMEL can EASILY walked on SAND because of his CUSHION like foot and human does not have that feet | |
| 8. |
Calculate the force of gravitation between two objects of masses 50kg and 120kg res respectfully kept at a distance of 10m from one anotherG=6.67*10-11Nm2 kg-2 |
| Answer» THISE is your ANS and BRAINLIEST ans PLASE not easly MATHOD have plase | |
| 9. |
Differentiation of (2t^+5) |
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Answer» T= |
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| 11. |
How is the resistance affected if the wire:a) thick and longb) thin and longc) thick and shortd) thin and short? |
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Answer» _____________ Resistance is given by :- R = rho L/A It is DIRECTLY PROPORTIONAL to length of wire Inversely proportional to AREA of CROSS section of wire TEMPERATURE dependent a▪ thick and long :- When wire is thick means area of cross section is more so resistance will be less, and long means length is more so resistance will decrease , So..... In this case resistance will remain the same . b▪ thin and long If wire is thin this means that area is smaller so resistance will be more . and if wire is long then as length is directly proportional to length its resistance will be more. So....... In this case resistance remains same . c▪ thick and short Thick means more area of cross section , as resistance isinversely proportional to area so resistance will be less and short wire means less length that is less resistance . So .... In this resistance is very less d▪ thin and short Area is less ,resistance will be more , it is short wire so resistance will be less So .... In this case resistance is less because area of cross section is less and at the same time length of wire is also short. ____________ |
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| 12. |
Please solve Q12 fast |
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| 13. |
Which is more accurate -30.00 or 3000.0? |
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Answer» ⏬⏬Here is the Answer⏬⏬ |
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| 14. |
How is the resistance affected if the wire is thick and long? |
| Answer» HOPE it HELPS you if it helps you PLEASE MARK me as a BRAINLIEST... | |
| 16. |
Light waves projected on oil surface show 7 colours due to the phenomenon of |
| Answer» DISPERSION is the ANSWER I THINK it HELPS you | |
| 17. |
At what height 'h' the value of 'g' will be half of that on the surface of earth |
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Answer» HOPE it will HELP you.. #PHOENIX |
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| 18. |
Distinguish edge triggering and level triggering. Provide the pictorial representations of triggering methods to flip flops |
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Answer» LEVEL TRIGGERING is nothing but transfer of data from input to an output of a flipflop anytime when the CLOCK PULSE is at proper voltage levels. On the other hand edge triggering is the transfer of data from input to an output of a flipflop whereas on the rising edge and also on the falling edge of the clock pulse.It can be EITHER positive edge or negative edge. |
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| 19. |
Hii friends good evening.plz tell me about the construction of a reflecting Periscope |
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Answer» A periscope is an optical instrument that uses a system of PRISMS, lenses, or MIRRORS to reflect images through a tube. Light from a distant object strikes the top MIRROR and is thenreflected at an angle of 90 degrees down the periscope tube.In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle. |
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| 21. |
Why it is painful to walk barefoot on a road covered with edge pebbles? |
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Answer» DEAR It is Because they have SHARP EDGES which PRICKLES (chubhna ) in our FOOT. |
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| 22. |
State the relation among SI unit of electric current, electric charge and time |
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Answer» HOPE it HELPS you THANKS |
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| 23. |
A voltage of 120 V is applied across a coded resistor having first,second and third rings of blue,black and yellow colours respectively. The current through the resistor is |
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Answer» The Psychological Study of Smiling. ...Psychologists call this the “Duchennesmile,” and most consider it the SOLE INDICATOR of true enjoyment. The name is a nod to French anatomist Guillaume Duchenne, who studied emotional expression by stimulating various facial MUSCLES with electrical CURRENTS. |
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| 24. |
Current provided by a battery is maximun whena. Internal resistance is equal to the external resistance b. Internal resiarance is less than external resistence c. internal resistence is greater than external resistence d. None of these |
| Answer» B is the CORRECT ANSWER | |
| 26. |
Obtain the relation between torque and angular momentum |
| Answer» RATE of CHANGE of angular momentum is equal to torque. Torque simply speaking is the measure of change in angular momentum of an OBJECT with RESPECT to time. This is analogous to FORCE in linear motion which is the measure of change in linear momentum with respect to time. Torque(T)=dL/dt (where L is angular momentum). | |
| 27. |
If 2 vectors are irrotational then prove the product of the 2 vectors are solenoid |
| Answer» VECTOR is a WEAPON . BRO | |
| 28. |
If the rod were translating as well as rotating what will be its emf? Assume that the center |
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Answer» If U want to know the annswer of MATHE question go to the CBSE GUIDE .COM |
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| 30. |
which of the metal pieces out of zn, Cu and Ag would use to prepare hydrogen gas from dilute hydrochloric acid in laboratory and why ? |
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Answer» ✨ HEY MATE ✨ |
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| 31. |
Calculate the work done by a boy lifting 10 kg laptop from the ground and keeping it in a table at a height of 1.5m |
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Answer» HEY MATE HERE IS YOUR ANSWER We know that, W = FS Force :- 10 kg Displacement :- 1.5 m W = 10 × 1.5 W = 15 N Hope it will HELP you @thanksforquestion @bebrainly @warm regards Ansh as ans81 |
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| 32. |
A concave mirror reflect light rays parallel to its principal axis to a point called the .... |
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| 33. |
The velocity varies with time according to the relation, v = 3t + 4. The distance travelled by the body in t = 2 s will be |
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| 36. |
How certain sources of energy are due to the sun are there sources of energy which are not due to the sun |
| Answer» SORRY . i am not ABLE to UNDERSTAND | |
| 37. |
Please answer my question 5 mark I will mark you brainistVery long answer please friends |
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Answer» Where is the QUESTION? |
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| 38. |
While traveling the car the moon moving with us ?why it is so? Explain |
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Answer» When we travel in the car we notice all the objects like trees, buildings, EVEN people, WHIZZING past our window. But if we look up at the Moon it doesn’t whizz past at all. In fact it seems to follow the journey with us. Did you ever wonder why? The short answer is that it is all down to how CLOSE the object is to our moving car. The trees, buildings and people are all fairly close to us, so as we pass by the DISTANCE we observe them from, changes very rapidly. The ANGLE we observe them at changes too. The Moon however, is very far away, 384,400 km away, to be precise. Even though our car is moving, it is not moving any closer, or farther away from the Moon, so the distance we observe the Moon from stays the same. As we look out the car window the Moon is still there, as if it is following us. |
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| 40. |
Work done in moving a body up a inclined plane of coefficient of friction mew and inclination theta |
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| 41. |
If4000ohm and 1000ohm connected parallel what will be the voltmeter reading |
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| 43. |
What is massssssssssssssssssssssssssssssss? |
| Answer» MASS is both a property of a physical BODY and a measure of its resistance to acceleration when a net FORCE is applied. The object's mass also determines the strength of its gravitational ATTRACTION to other bodies. The basic SI UNIT of mass is the kilogram. | |
| 44. |
Why are the unburnt carbon particles produced by the combustion of fuels considered to be harmful? |
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Answer» HI MATE.... your answer... unsaturated hydrocarbon EMITS LOTS of black smoke and unburn carbon particles and are harmful hope it helps... |
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| 45. |
You have been given three beakers with a magnet in each. Pour iron fillings in each one of them and then pour very cold water in one,very hot water in the second one and no water in the third one.Which magnet will attract maximum amount of iron fillings? Justify your answer |
| Answer» SECOND BEAKER..will attract MAXIMUM amount of iron FILLINGS | |
| 46. |
If the value of g increases would it become difficult to walk on the earth? |
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Answer» Yes, off course if G increases then the FRICTION would also INCREASE as friction is equal to muN. If friction increase then WALKING would be tougher. |
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| 47. |
If we know the velocities of crust and mantle and crustal thickness then what is the head wave velocity? |
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| 49. |
what is the approximate value of Orbital speed of a satellite revolving around the earth near its surface |
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Answer» ORBITAL Velocity Formula Objects that travel in uniform circular MOTION around the Earth are said to be "in orbit". The velocity of this orbit depends on the distance from the OBJECT to the center of the Earth. The velocity has to be just right, so that the distance to the center of the Earth is always the same.The orbital velocity formula contains a CONSTANT, G, which is called the "universal gravitational constant". Its value is = 6.673 x 10-11 N∙m2/kg2 .The radius of the Earth is 6.38 x 106 m. v = the orbital velocity of an object (m/s) G = the universal gravitational constant, G = 6.673x10(-11) N∙m2/kg2 mE = the mass of the Earth (5.98 x 1024 kg) r = the distance from the object to the center of the Earth PLEASE GIVE ME BRAINLIEST |
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| 50. |
A dam is situated 550 metres above the sea level and supplies water to power house which is at the the hieght of 50 metres above sea level.2000 kg of water passes through the turbines per second.The maximum electrical power output of the power house if the whole system were 80 percent efficient is |
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Answer» ANSWER: The maximum power should be 9084 voltage required for the power supply. EXPLANATION: Power = rate of TRANSFER of energy = rate of loss of PE in this case .. PE = mgh PE rate of loss = (mg∆h) / t = (m/t)g∆h .. .. (m/t) = mass of water PER sec (kg/s) = 2000kg/s X 9.80 x (550-50)m = 9.80^6 J/s (W) .. at 100% efficiency At 80% efficiency, power output = 0.80 x 9.80^6W .. .. ►P = 7.84^6 W |
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