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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. |
Name the physical quantity denoted by slope of distance time graph and velocity time graph. |
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Answer» whereas vel time graph show ACCELERATION |
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| 2. |
What conclusion can you draw if position time graph is parallel to time axis? |
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Answer» Answer: BODY is at REST WHEREAS TIME is INCREASING |
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| 3. |
a body starts from rest with uniform acceleration ,if it's velocity after n second is v then it's displacement in the last two seconds |
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Answer» s=1/2a(2t-1) s=1/2a(2n-1) s=3v(2×2-1)/2n s=3v /2n Explanation: |
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| 4. |
The value of g at height equal to the radius of the earth from its surface is? |
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Answer» Explanation: G at a height h above the ground => where r is the RADIUS of the EARTH so the value of g at height r from its SURFACE is Hope it helps you. |
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| 5. |
A car traveling at 20Km/h speed of 60km/h in 6second what its acceleration |
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Answer» Answer: 6.66.... Explanation:In this QUESTION we have the following V(Final velocity)= 60km/hr U(INITIAL velocity)= 20km/hr T(Time TAKEN)= 6sec From this we can DERIVE, Acceleration= CHANGE in velocity/Time taken or v-u/t = 60-20/6 = 6.66....
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| 6. |
a particle starts from origin and moves along positive x-axis to the point (20,0) and then returns along on the x-axis to the point (-20,0) in 10 seconds. find the average speed and velocity. |
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Answer» here is your ANSWER PLZ SEE the ATTACHMENT |
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| 7. |
Difrentiation of ln(sin²x) |
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| 8. |
1.The mass of a body is measured on planet earth as Mkg.when it is taken to a planet of radius half that of the earth then its value Wii be-----kg. 2.if the earth shrinks to 50%of its real radius its mass remaining the same,the weight of a body on the earth will |
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| 9. |
HEY MATESWHAT DOES PRINCIPAL OF HOMOGENITY STATES??o? |
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Answer» ❤♣️HËŁŁØ MÃŤÉ♣️❤ The principle of HOMOGENEITY is that the dimensions of each the terms of a dimensiional EQUATION on both sides are the same . Any equation or formula involving dimensions (LIKE mass, length, time , TEMPERATURE electricity) have the terms with same dimensions. ✶⊶⊷⊶⊷⊷⊶⊷ ❍⊷⊶⊷⊶⊷⊶⊷✶ |
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| 10. |
Equal moles of H2O and NaCl are present in a solution hence molality of NaCl is |
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Answer» a/c to question, equal MOLES of H2O and NaCl are present in a solution. Let N moles of NaCl are present in n moles of H2O solution. so, number of moles of NaCl(SOLUTE) = n mass of water (SOLVENT ) =number of moles of H2O × molar mass of H2O = n × 18 = 18n grams [ as you know, molar mass of H2O = 18g/mol] use formula, molality = number of mole of solute/mass of solvent in Kg = n × 1000/(18n ) = 1000/18 = 55.55 molal hence, molality of NaCl is 55.55m. |
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| 11. |
Find out expression for electric potential due to point charge |
Answer» Heya...The potential at an INFINITE distance is often taken t be zrro The case of the electric potential generated by a point CHARGE is important because it is a case that is often ENCOUNTERED The equation for the electric potential due to a point charge is V=KQrV=KQR where K is a constant equal to hope it HELPS you |
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| 12. |
an isolated point charge is placed in homogeneous isotropicmedium.the equipotential surface due to the charge is _______ |
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Answer» Answer: its very difficult can i get some time PLZ MARK ne BRILLIANT plz sir/ mam humble REQUEST |
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| 13. |
Define ampere swimming rule |
Answer» Heya...your ANSWER is... It DEFINES that if a PERSON is swimming along with a wire when it is in the direction of current facing a magnetic needle faced below the wire then the north of the needle deflects TOWARDS the persons hand |
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| 14. |
Define resonance condition of cyclotron |
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Answer» ▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬ The FREQUENCY of the APPLIED voltage is KEPT exactly the same as the frequency of revolution of the proton, then every time the proton reaches the gap between the two DEES, the electric field is reversed And proton receive a push and FINALLY it accquires very high energy. This is called Cycloton's Resonance Condition. ▬▬▬▬▬ஜ۩۞۩ஜ▬▬▬▬▬▬ |
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| 15. |
Here is your question |
Answer» ⚡Here is your answer⚡refer to the attachment ❌mahir❌ |
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| 16. |
a body is moving along a circular path of diameter 200m it take 40 minutee to complete one round calculate the distance and displacement at the end of 2 minutes 20 seconds |
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Answer» Answer: 200m Explanation: Diameter of circular track (D) = 200 m Radius of circular track (r) = 200 / 2=100 m Time taken by the ATHLETE for one round (t) = 40 s Distance covered by athlete in one round (s) = 2π r = 2 × ( 22 / 7 ) × 100 Speed of the athlete (v) = Distance / Time = (2 × 2200) / (7 × 40) = 4400 / 7 × 40 Therefore, Distance covered in 140 s = Speed (s) × Time(t) = 4400 / (7 × 40) × (2 × 60 + 20) = 4400 / (7 × 40) × 140 = 4400 × 140 /7 × 40 = 2200 m Number of round in 40 s =1 round Number of round in 140 s =140/40 =3 1/2 Hence, DISPLACEMENT of the athlete with respect to initial POSITION at x= xy = Diameter of circular track = 200 m |
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| 17. |
What are the factors that affect the uniform circular motion? |
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Answer» The centripetal FORCE depends on the mass of the OBJECT, speed of the object, its frequency of rotation and the radius of the circular PATH ALONG which the object MOVES. |
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| 18. |
Given two examples of bodies having non uniform motion |
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Answer» ............................................... |
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| 20. |
15. A man raises a box of mass 50 kg to a heightof 2 m in 20 s, while another man raises the samebox to the same height in 50 s.(a) Compare : (i) the work done, and (ii) the powerdeveloped by them.(b) Calculate : (i) the work done, and (ii) the powerdeveloped by each man. Take g = 10 N kg-1. |
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Answer» Answer: Work done by both of them is same, but power developed by them is 50 WATT and 20 Watt respectively. Explanation: Work done by first MAN = mgh = 50 * 10 * 2 = 1000 J Work done 2nd man = mgh = 50 * 10 * 2 = 1000 J Power developed by 1ST man = Work / Time = 1000 / 20 = 50 Watt Power developed by 2nd man = Work / Time = 1000 / 50 = 20 Watt ∴ Work done by both of them is same, but power developed by them is 50 Watt and 20 Watt respectively. |
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| 21. |
11. The heat generated in a circuit is dependent upon theresistance, current and time for which the current isflown. If the error in measuring the above are as 1%,2% and 1% the maximum error in measuring heatwill be(a) 2%(b) 3% (c)6% (d) 1% |
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Answer» The heat generated in a circuit is dependent upon the resistance, current and time for which the current is flown. If the error in measuring the above are as 1%, 2% and 1% the maximum error in measuring heat will be (a) 2% (b) 3% (c)6% (d) 1% (b) |
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| 22. |
A student while going to school in a school bus,observes the average speed of the bus to be20 km/h. On his return trip along the same way,the average speed is 30 km/h. What is the averagespeed of the bus in the entire journey? |
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Answer» =2×30×20/20+30 =2×30×20/50 =2×3×4=24 |
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| 23. |
A spherical mirror produces a image of magnification - 1 on a screen placed at a distance of 50cm from the mirror.a) Write the type of mirror. b) Find the distance of the mirror from the object. c) What is the focal length of the mirror.d) Draw the ray diagram to show the image formation in this case. PLZZ TELL ME FAST... |
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Answer» It is concave MIRROR coz m is NEGATIVE M=-v /u -1=-50/u U=50cm 1/f=1/v+1/u F=50/2=25cm |
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| 24. |
5 marks question class 11physicsdont spam |
Answer» ⚡Here is your answer⚡refer to the ATTACHMENT ⭐Mahir⭐ |
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| 25. |
Define ohm's law and prove it? |
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Answer» The POTENTIAL DIFFERENCE across the ends of a resistor is directly proportional to the current through it, provide its temperature remains the same. |
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| 26. |
How far does a car travel in 2.5 hours if its average speed is 54 km per hour |
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Answer» THE ANSWER TO YOUR QUESTION IS 54×2.5=135 |
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| 27. |
What are 10 examples of chemical change (permanent change)? |
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Answer» burning of paper,cooking of FOOD, digestion of food,rusting of iron , PHOTOSYNTHESIS,ripening of fruit,yellowing of teeth,formation of acid RAIN,burning of fuels,milk change into curd. |
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| 28. |
A car will start from rest and moves along the x-axis with constant acceleration 5msec for 8 sec if then continue with constant velocity,what distance will the car move in 12 sec since it started from the rest |
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Answer» Here is your answer BUDDY |
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| 29. |
Where rani laximi bai born and what is the date |
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Answer» Answer: Lakshmi Bai, also spelled Laxmi Bai, (born c. NOVEMBER 19, 1835, Kashi, India—died June 17, 1858 mark it as BRAINLIAST PLEAAE |
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| 30. |
Solve the formula for (1)u(2)t(3)aS=it+1/2at^2 |
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Answer» s=ut+1/2at*t Explanation: |
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| 31. |
Who is the mother of rani laxmi bai |
Answer» ANSWER:: BHAGIRATHI SAPRE...♥❤♥❤♥❤♥ FOLLOW ME |
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| 32. |
The mass of a stone is 2kg if it takes 6 secondto reach the maximum height calculate the initial velocity |
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| 33. |
*NO COPIES AND WITH EXPLAINATION**BEST ANS BRAINLIEST I PROMISE*The variation of velocity of a panicle movingtravelled by the particle in 4 sis :yol a particle moving along a straight line is shown in the figure. The distance travelled by particle in 4 s is:(A) 25 m(B) 30 m(C) 55 m(D) 60 m |
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Answer» A PARTICLE Q is moving +Y axis. Another particle P is moving in XY plane along a straight LINE x=-d (d>0) with a uniform speed v parallel to that of Q. At time t=0, particles P and Q happen to be along X axis whereas a third particle R SITUATED at x=+d starts moving opposite to P with a constant acceleration a. At all further instants, the three particles happen to be collinear. |
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| 34. |
A body has initial position (2i+ 3j) m and final position (4i +j) m. Time taken for complete motion is 2 sec.What is the average velocity? |
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Answer» velocity is equal to DISPLACEMENT UPON TIME |
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| 35. |
Show that 1/2 gt2 has same dimension of distance |
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Answer» Answer: Since g is acceleration DUE to GRAVITY, then its dimensions are the same as that of acceleration. therefore,[g]= [LT^-2]. Now, dimension of 1/2[gt^2]=[L] We can write constant as it is DIMENSIONLESS. [gt^2]=[L] ⇒ [g][t^2]=[L] ⇒ [g]=[L]/[t^2] ⇒ [g]=[L]/([T]^2) ⇒ [g]=[LT^-2] [Writing conventions may differ.] Hence, Dimension of g = M°LT^(-2) or L/T² |
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| 36. |
the velocity of a car moving on a straight road increase linearly according to equation V is equal to a + bx where a and b are constant the acceleration in the course of such motion |
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Answer» The velocity of a car moving on a straight road increase linearly according to equation, v = a + bx where a and b are constants. differentiating both sides with respect to time, i.e., dv/dt = d(a + bx)/dt = 0 + b × dx/dt we get, dv/dt = b (dx/dt) .....(1) we know, ACCELERATION is the rate of CHANGE of velocity with respect to time. so, a = ∆v/∆t for instantaneous acceleration, a = dv/dt....(2) and displacement is the rate of change of velocity with respect to time. i.e., v = dx/dt ....(3) from equations (1), (2) and (3), a = bv putting v = a + bx so acceleration , a = b(a + bx) = AB + b²x hence, REQUIRED answer is, a = ab + b²x. |
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| 37. |
What is potential Gradient? |
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Answer» Answer: In physics, chemistry and biology, a potential gradient is the local rate of change of the potential with RESPECT to DISPLACEMENT, i.e. spatial DERIVATIVE, or gradient. This quantity frequently occurs in EQUATIONS of PHYSICAL processes because it leads to some form of flux. |
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| 38. |
What is the relation between electric field intensity and potential? |
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Answer» Answer: The relation is very simple. Electric FIELD INTENSITY is equal to the negative of rate of change of potential with respet to the distance or it can be defined as the negative of the rate of derivative of potential DIFFERENCE, V with respect to r, E = - dV/dr. hope it will help you.... MARK it as brainliest answer.... |
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| 39. |
Write the difference between series and a parallel combination of resistance |
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Answer» Explanation: in series RESISTANCES are DIRECTLY ADDED to each other but in PARALLEL their RECIPROCAL was added. |
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| 40. |
When we jump out of a boat the boat moves slightly backward? |
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Answer» Answer: Because when we jump the FORCE EXERTED by the legs ,the boat MOVES backward Explanation: |
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| 41. |
When three capacitors joined in series the total capacitance is? |
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Answer» 3/c Explanation:
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| 42. |
when a piece of stone is dropped in a deep well,the sound of splash is heard 7.7 s after it is dropped. if the speed of sound is 343 m/s, find the depth of the well |
Answer» HEY MATE HERE IS YOUR ANSWER |
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| 43. |
*Best ans BRAINLIEST I promise URGENT*The variation of velocity of a particle moving along a straight line is shown in the attachment. The distancetravelled by the particle in 4 s is:(A) 25 m(B) 30 m(C) 55 m(D) 60 mPROPER EXPLAINATION ALSO NEEDED |
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Answer» the distance covered will be measured as the AREA of the shape in the graph now look carefully you will FIND a rectangle and a TRAPEZIUM and a right angled TRIANGLE. ( up trapezium down rectangle and a right angled triangle beside it) area of rectangle: ( l×b) 10×3=30 area of trapezium: ( a+b/2h)
substituting we get 15 area of triangle: 1/2bh b=1 h=20 substituting we get 10 AND FINALLY... add them! 30+15+10=55 hope this helps :) |
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| 45. |
A car is moving ina straight line with speed 18 km/hr. It stopped in 5s by applying the brakes find the speed of the car after 2s of applying the brakes . |
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| 46. |
The average velocity of a body moving with uniform acceleration travelling a distance of 3.06 m is 0.34 mIf the change in velocity of the body is 0.18ms during this time, its uniform acceleration is(a) 0.01 ms(b) 0.02 ms?(c) 0,03 ms?(d)0,04 ms |
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Answer» 0.01 is your answer DEAR |
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| 47. |
A त्वरण से उपर की ओर गतिमान लिफ्ट एक पत्थर को छोड़ा जाता है तो छोड़ने के पश्चात पत्थर का चरण हो ।(A) a उपर की ओर (B) (g-a) उपर की ओर (C) (g-a) नीचे की ओर (D) ! नीचे की ओर |
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| 48. |
10. At what depth below the earth surface the value of g radius to one-half of its value on the earth's surfaceA: R/4B: R/2C: R4: 2R |
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Answer» The FORMULA is g= GM/r^2 g/2=GM/r^2 ,g =GM/r^2/2 meaning distance from centre of MASS is r/√2 which is 4525.48339959390 m from centre of mass of EARTH . g/4=GM/r^2 , g=GM/r^2/4 meaning distance from centre of mass is r/2 which is 3200m from the centre of mass of the earth. |
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| 49. |
A body A starts from rest with anacceleration a1 After 2 seconds, another body B starts from rest with an accelerationa2. If they travel equal distances in the 5th second, after the start of A, then the ratio a1:a2 isequal to |
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Answer» Answer: Explanation: |
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| 50. |
Force is defined as the product of mass and acceleration. comment |
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