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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. |
Which of the following independent quantities is not used to specify the earth’s magnetic field? (a) Magnetic declination (θ). (b) Magnetic dip (δ). (c) Horizontal component of earth’s field (BH). (d) Vertical component of earth’s field (BV). |
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| 2. |
A current flows in a wire running between the S and N poles of a magnet lying horizontally .The force experienced by the wire is directed |
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Answer» DownwardExplanation:ACCORDING to the rule of FLEMMING the DIRECTION of the force can be calculated downward |
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| 3. |
The earth behaves as a magnet with magnetic field pointing approximately from the geographic (a) North to South (b) South to North (c) East to West (d) West to East |
| Answer» C)EAST to WEST is a CORRECT ANSWER | |
| 4. |
In a series combination, potential difference across each resistor varies.............................with the resistance of the resistors. |
| Answer» TION:Answer. (i) Total POTENTIAL difference across a combination of resistors in series is equal to the sum of potential difference across the individual resistors. Hence , a fuse of rating 5A can be used because it can bear the current | |
| 5. |
At a given place on earth’s surface the horizontal component of earth’s magnetic field is 2 × 103-5 T and resultant magnetic field is 4 × 103-5 T. The angle of dip at this place is (a) 30° (b) 60° (c) 90° (d) 45° |
| Answer» EXPLANATION: HI WANT TO CHAT | |
| 6. |
The angle of dip at a certain place where the horizontal and vertical components of the earth’s magnetic field are equal is (a) 30° (b) 75° (c) 60° (d) 45° |
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Answer» That is ( D ) PART...45° |
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| 7. |
Which of the following is responsible for the earth’s magnetic field? (а) Convective currents in earth’s core (б) Diversive current in earth’s core. (c) Rotational motion of earth. (d) Translational motion of earth. |
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Answer» (a) CONVECTIVE CURRENTS in EARTH's corePLEASE MARK ME AS BRILLIANT |
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| 8. |
Point out the correct direction of magnetic field in the given figures. |
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Answer» in only NORTH or SOUTH it can be EXPLANATION:please GIVE thanks |
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| 9. |
Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator is (a) always zero (b) positive, negative or zero (c) unbounded (d) always negative |
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Answer» (B) POSITIVE, NEGATIVE or zeroHope this HELPS youShakuntalam |
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| 10. |
The strength of the earth’s magnetic field is (a) constant everywhere. (b) zero everywhere. (c) having very high value. (d) vary from place to place on the earths surface. |
| Answer» ANSWER ( D ) part ..that is VARY from PLACE to place on the earths SURFACE | |
| 11. |
The net magnetic flux through any closed surface, kept in a magnetic field is (a) zero (b) \frac{\mu_{0}}{4 \pi} (c) 4πμ0 (d) \frac{4 \mu_{0}}{\pi} |
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Answer» riend..!!The ANSWER of U R QUESTION is.!!Option.cThank you..!! |
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| 12. |
The distance of the closest approach of an alpha particle fired at a nucleus with kineticenergy K is fo. The distance of the closestapproach when the a particle is fired at thesame nucleus with kinetic energy 2K will be[GUJ CET 2015)(A)ro/2(B)4ro©ro/4(D) 2ro |
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Answer» .....,EXPLANATION:.4ro.................... |
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| 13. |
A satellite is orbiting the earth at a steady speed of 8km/s. How long will it take to complete a single orbit with a distance of 40,000km |
| Answer» TIME taken to COMPLETE the distance =138.888889 hrsExplanation:pls MARK it brainliest | |
| 14. |
An object has uniform movie under the conditions |
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Answer» Equal time in equal INTERVAL of time.. HOPE it will HELP u.. REMEMBER to mark it as BRAINLIST answer.... |
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| 15. |
8. Uncontrolled nuclear chain reaction is the basis of _________________. |
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Answer» Nuclear Chain Reactions A chain REACTION refers to a process in which neutrons released in fission produce an additional fission in at least one further nucleus. This nucleus in turn PRODUCES neutrons, and the process REPEATS. The process may be controlled (nuclear power) or uncontrolled (nuclear weapons).hope this helps you!!! |
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| 16. |
The ratio of velocities of the shafts connected by Hooke's joint is given by 2/31-cos? Osin acosaNI-cos” a sin e(b) N.cosa2/2" N,wherecosa1-cos? Osin’a“ N. 1-cos?asinoN and N, = Speed of driving and driven shafts (in r.p.m.) respectively,0 - Angle through which the arms of the cross tum, anda = Angle of inclination between the two shafts.OA |
| Answer» QUESTION is not WRITTEN PROPERLY | |
| 17. |
FIND THE FORCE APPLIED BY THE ATMOSPHERIC PRESSURE ON AREA 15CM x 15CM. SOLVE IT. |
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Answer» F=P*areaF=2250NMark as BRAINLIEST |
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| 19. |
Advantages of revebration |
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Answer» : Advantages of ReverberationReverberations do wonders when it comes to musical SYMPHONIES and ORCHESTRA halls, when the right amount of reverberation is present, the sound QUALITY GETS enhanced drastically. This is the REASON why sound engineers are appointed during the construction of these halls. |
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| 20. |
37. In Fig. the magnetic needle has magnetic moment 6.7x10-2 Am? and moment of inertiaI = 7.5x10 kg m². It performs 10 completeoscillations in 6.70 s. What is the magnitude of themagnetic field ?1) 0.2 T2) 0.05T3) 0.08 T4) 0.01T38. A bar magnet freely suspended in a vibration |
| Answer» OPTION 2 is the CORRECT ANSWER THANK you | |
| 21. |
Magnetic moment for solenoid and corresponding bar magnet is (a) equal for both (b) more for solenoid (c) more for bar magnet (d) none of these |
| Answer» HEY MATE here's ur answerExplanation:it will be EQUAL for bothPLZZ MARK ME AS BRAINLIST☺ | |
| 22. |
A magnet of dipole moment M is aligned in equilibrium position in a magnetic field of intensity B. The work done to rotate it through an angle 0 with the magnetic field is (a) MB sin θ (b) MB cos θ (c) MB (1 – cos θ) (d) MB(l – sin θ) |
| Answer» MB(1-COS THETA)Explanation:MB (cos theta 1 - cos theta 2) | |
| 23. |
At a certain place on earth, B_{H}=\frac{1}{\sqrt{3}} B_{V} angle of dip at this place is (a) 60° (b) 30° (c) 45° (d) 90° |
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Answer» i THINK 90DEGREE is the RIGHT answerExplanation:IF I AM RIGHT PLZZ MARK ME AS BRAINLIST☺ |
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| 24. |
A person uses covcave mirror for shaving where dhould he position his face in fornt of it? |
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Answer» tion:a person USES a concave mirror for SHAVING, where should he position his face in front of it? His face should be positioned between focus and pole to get an ENLARGED,ERECT and virtual image of the face. |
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| 25. |
Which of the following is correct about magnetic monopole? (a) Magnetic monopole exist. (b) Magnetic monopole does not exist. (c) Magnetic monopole have constant value of monopole momentum. (d) The monopole momentum increase due to increase at its distance from the field. |
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Answer» : OPTION BExplanation: because MAGNETIC POLES always exists in pairs. They hence EXIST individuality. |
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| 26. |
A magnet can be completely demagnetised by (a) breaking the magnet into small pieces. (b) heating it slightly. (c) dropping it into ice cold water. (d) a reverse field of appropriate strength. |
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Answer» this is your answer matemy PHYSICS is not so good but I THINK OPTION D is WRITE |
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| 27. |
At a point on the right bisector of a magnetic dipole, the magnetic (a) potential varies as \frac{1}{r²} (b) potential is zero at all points on the right bisector. (c) field varies as r3. (d) field is perpendicular to the axis of dipole. |
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Answer» 123456789011121314151617181920 |
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| 28. |
The universal property among all substances is (a) diamagnetism. (b) paramagnetism. (c) ferromagnetism. (d) all of these. |
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Answer» your ANSWER is DIAMAGNETISM |
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| 29. |
In which type of material the magnetic susceptibility does not depend on temperature? (a) Diamagnetic (b) Paramagnetic (c) Ferromagnetic (d) Ferrite |
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Answer» The ANSWER is FERROMAGNETIC |
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| 30. |
The primary origin of magnetism lies in (a) atomic current and intrinsic spin of electrons. (b) polar and non polar nature of molecules. (c) pauli exclusion principle. (d) electronegative nature of materials. |
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Answer» your answer is atomic CURRENT and intrinsic SPIN of ELECTRONS |
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| 31. |
A diamagnetic material in a magnetic field moves (a) perpendicular to the field. (b) from weaker to stronger parts. (c) from stronger to weaker parts. (d) in random direction. |
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Answer» hey MATE here's UR answerExplanation:IT moves from stronger to WEAKER PARTS of the fieldPLZZ MARK ME AS BRAINLIST☺ |
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| 32. |
The position time relation for a particle is given by the following relations: x=5+3t and y=2-5t. Is this motion 2 dimensional? If yes, give reason. If not, justify. |
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Answer» is a 2 dimensional motion.The motion of the particle changes by time.. when time changes, the value of x AXIS and the y axis changes. Therefore the motion depends on both the axes (x and y). So it is a 2 dimensional motion.key pointif it was 1-D, it will only DEPEND one one axis.if it was 3 D, it will depend on all the three axes.. x, y and z |
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| 33. |
 find electric flux through the square shown |
| Answer» EXPLANATION:PERPENDICULAR to it | |
| 34. |
15. A in 50 s. Find : (i) the maximum velocity reached, (ii) the retardation in the last50 s, (iii) the total distance travelled, and (iv) theaveragetrain starts from rest and accelerates uniformly ata rate of 2 m s-2 for 10 s. It then maintains aconstant speed for 200 s. The brakes are thenapplied and the train is uniformly retarded andcomes to rest velocity of the train.Ans. (i) 20 m s-1, (ii) 0.4 m s?,(iii) 4600 m, (iv) 17.69 m s-1 |
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Answer» train starts from REST and ACCELERATES uniformly at a rate of 2m/s^2 for 10S. It then MAINTAINS a constant speed for 200s. The brakes are then applied and the train is uniformly retarded and comes to rest in 50s. Find : ( i ) the maximum velocity REACHED, ( ii ) the retardation in the last 50s, ( iii ) the total distance travelled, and ( iv ) th |
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| 35. |
a heating coil is cut into two halves and both are joined in parallel to the same source.the power liberated is 400 W.Rate of the original coil may be |
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Answer» P = 100W. (power rating) V = 200V. ( voltage supply) thus resistance of the coil: P = V2 / R thus R = 40000/100 = 400 ohm hence of the TWO new parts PRODUCED, new resistance of each part, R' = 200 ohm each on parallel connection, net resistance: 1/Rt = 1/R' + 1/R' hence Rt = R'/2 = 100 ohm and the new power rating, P = V2 /Rt = 40000/100 = 400 WRead more on Brainly.in - brainly.in/question/703667#readmore |
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| 36. |
State the universal law of gravitation derive it with mathematical expression |
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Answer» s universal law of gravitation states that when two body are separated by a DISTANCE r, then both attract each other with a force which is DIRECTLY proportional to the PRODUCT of their masses (M1 and m2) and inversely proportional to the square of distance between them (r). |
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| 37. |
A steering wheel has a radius of 50 cm. Two forces each of 20 N acts at the ends of steering wheel. Draw the diagram of the arrangement and find the moment of the force.If you answer this correctly will mark you as a brainlist |
| Answer» 2*Explanation:20*(50/100)*2 is the LONG | |
| 38. |
Two identical metallic sphere having a positive |
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Answer» initial charges be q1 and q2 respectively. After they come in CONTACT, the charges are rearranged search that they acquire same charge.latest SAY that a charge on each of them is q.They are again BROUGHT apart at a distance of 0.9m.Hence,the force between them will be given asF=KQ^2/r^20.025=(9×10^9×Q^2)/0.9^2Q^2=0.025×0.9^2/9×10 ^9Q=1.5×10^-6 C |
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| 40. |
Please answer it fast it is urgent |
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Answer» it will ............. |
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| 41. |
Hooke's low states that the force F aina spring extended by a length x is given byF = ka. According to newtanis low F ma, wheremis the mass and a is acceleration calculatethe dimension of the spring constant k |
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| 42. |
An object is placed 2 m in front of a plane mirror. An observer stands 4 m behind the object. At what distance must the observer focus his eyes in order to see the image of the object? |
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Answer» the OBSERVER FOCUS his EYES in order to see the image of the OBJECT at a distance of8m |
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| 43. |
The charge a is projected into a uniform electric field E work done when it moves a distance Y is |
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Answer» Please try it your self and please MARK it brainliest THANK you |
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| 44. |
Defined co- efficient of coupling and obtain it's equation |
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Answer» the fraction of magnetic flux produced by the current in one COIL that LINKS with other coil is called coming OFFICIENT of coupling. |
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| 45. |
Balance the following chemical equations1)NaOH2+H2SO4➡️Na2SO4+H2O |
| Answer» REACTION........ 2NaOH+H2SO4=>Na2SO4+2H2O.....✌✌✌✌✌✌Hope you LIKE it......... | |
| 46. |
You are required to make an electromagnet from a soft iron bar. Draw a circuit diagram using a cell, an insulated copper coil and a soft iron bar pls it is important |
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Answer» -------------------www------------------ <------INSULATED COPPER WIRE| ELECTROMAGNET | | || PLUG KEY CELL ||-------------(.)--------------------|/ ------------|HERE IS YOUR DIAGRAM!HOPE YOU LIKED IT!!! |
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| 47. |
What is ACAM2000 ?????????? |
| Answer» TION:ACAM2000 is the VACCINE for small POX INVENTED by Edward JennerFollow meAanya❤️ | |
| 48. |
Find the slope of the function y = sin x + 1 x 2 − 3 log e x at x = π 2 |
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| 49. |
Explain . In the Faraday s experiment of electromagnetic induction state the factors on which the induced EMF Depends. ........ |
| Answer» TION:FIRST nature of the material of electrodessecond internal resistance of the cellthird DIFFERENCE between the electrodesplease follow me and THANKS me | |
| 50. |
Question 7 A particle is being acted upon by the four forces of 30 N due east 20 N due north, 50 N due west and 10 N due south The result force will be202N 60° south to west20.2N 15 south west20. 2N 45 north to east20.2N 45 soub to east |
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