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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. |
Please solve this for me I didn't get it in exam |
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Answer» Mark me BRAINLIEST |
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| 2. |
Calculate the distance travelled by the body in first 2 hours of journey graphically |
Answer» Distance TRAVELLED by the body in FIRST 2 hours = 40 KMExplanation: Distance travelled by the body in first 2 hours = Area under the LINE AB in the graph Are of triangle ABE = = 40 km |
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| 3. |
Ncert class 10 Ch 13 (magnetic effects of electric current) Important topic |
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Answer» EVERY topic is important |
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| 4. |
Equation of motion:-First equation of motion-Second equation of motion-Third equation of motion - |
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Answer» Pls mark it Brainliest. Answer: (i) v=u+at (II)s=ut+½at² (III) 2as=v²-u² Explanation: (where v is the final VELOCITY u - INITIAL velocity a - ACCELERATION t - time taken. and s=displacement) Pls Rate this. |
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| 5. |
Relation between depth and height where effective g have same value |
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Answer» THEU are directluy PROPORTIONAL |
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| 6. |
Relation between depth and height where effectively have same value |
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Answer» Answer: both are same but meaning CHANGES bro height means the OBJECT is above GROUND level example-cylindrical TANK and depth means it is below ground level. ex-well |
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| 7. |
Electric fieldproducedduetopolarization |
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Answer» Answer: Polarization OCCURS when an electric field distorts the negative cloud of electrons around positive atomic nuclei in a direction opposite the field. This slight separation of charge makes one side of the atom somewhat positive and the opposite side somewhat negative. Explanation: The electric dipole moment p of two charges +q and −q SEPARATED by a distance l is a vector of magnitude p = QL with a direction from the negative to the positive charge. An electric dipole in an external electric field is subjected to a torque τ = pE sin θ, where θ is the angle between p and E. The torque tends to align the dipole moment p in the direction of E. The potential energy of the dipole is given by Ue = −pE COS θ, or in vector NOTATION Ue = −p · E. In a nonuniform electric field, the potential energy of an electric dipole also varies with position, and the dipole can be subjected to a force. The force on the dipole is in the direction of increasing field when p is aligned with E, since the potential energy Ue decreases in that direction. The polarization of a medium P gives the electric dipole moment per unit volume of the material; it is expressed in units of coulombs per metre squared. When a dielectric is placed in an electric field, it acquires a polarization that depends on the field. The electric susceptibility χe relates the polarization to the electric field as P = χeE. In general, χe varies slightly depending on the strength of the electric field, but for some materials, called linear dielectrics, it is a constant. The dielectric constant κ of a substance is related to its susceptibility as κ = 1 + χe/ε0; it is a dimensionless quantity. Table 1 lists the dielectric constants of a few substances. please mark as the brainliest |
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| 8. |
Find the displacement of a SHM oscillator at which is potential energy of the oscillator |
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Answer» Let US assume that the required displacement where PE is half of the maximum ENERGY of the oscillator be x. |
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| 9. |
The momentum of body increased by 25%.Then kinetic energy is increased by about. |
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Answer» <P>Answer: Explanation: % INCREASE in kinetic ENERGY=0.56x100=56%. The linear momentum of a body is increased by 15%.... Explanation: The relation between kinetic energy, K and momentum p is the following. Since, body is the same, mass remains constant. |
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| 10. |
What is an adialratie operation. Statenecessary conditions for its performance (2)I Calculate work done per mole in sothermalEspainsar37 |
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Answer» Answer: Explanation: An adiabatic PROCESS OCCURS without transfer of heat or MASS of substances between a thermodynamic system and its surroundings. In an adiabatic process, ENERGY is transferred to the surroundings only as work. |
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| 11. |
A 200 watt bulb is lighted for 2 hours how much energy is consumed |
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Answer» Answer: 400 J Explanation: GIVEN, Power = 200W, TIME = 2h We KNOW that Energy = Power X time ⇒ Energy = 200 x 2 = 400J Hope it helps! |
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| 12. |
What is Karchofs laws |
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Answer» Kirchhoff's circuit laws are two EQUALITIES that deal with the current and potential difference in the lumped element model of electrical circuits. They were first described in 1845 by German physicist Gustav Kirchhoff. This GENERALISED the work of Georg OHM and PRECEDED the work of James Clerk Maxwell. |
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| 13. |
The momentum of body increased by 25%.Then kinetic energy is increased by about. |
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Answer» Answer: |
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| 14. |
What is a dowry system ???? |
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Answer» Answer: It is a CONSIDERATION from the SIDE of the bride's parents or RELATIVES to the groom or his parents and/or guardian for the agreement to WED the bride-to-be. Explanation: |
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| 15. |
Draw a diagram of 3 usages of treatment plant |
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| 16. |
Various layer in the soil are called |
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Answer» SOIL Horizons (layers): Soil is made up of distinct horizontal layers; these layers are CALLED horizons. They RANGE from rich, organic upper layers (humus and topsoil) to underlying rocky layers ( subsoil, regolith and bedrock |
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| 17. |
How many resistances of 8 ohms should be joined in parallel to draw a current of 3 amperes from abattery of 4 volts?(a) 6(b) 8() 12(d) 15 |
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Answer» Answer: 6 RESISTORS for EXPLAINATION SEE attachment Explanation: MARK me as BRAINLIEST |
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| 18. |
How much current will an electric heater rated 1 kilowatt from when connected to a 220 volt supply |
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Answer» Explanation: 110 V |
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| 19. |
2. Which of the following is not the character of mechanical waves?a) Propagation depends on the elasticity of mediumb) Can be both transverse or longitudinalc) Requires a material mediumSpeed is comparatively higher |
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Answer» ANSWER:d)SPEED is COMPARATIVELY higher Explanation: |
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| 20. |
3. The resistivities of copper and silver are 1.68 x 1022 cm and 1.59 x 10-6 22 cm respectively. Which ofthe two is better electrical conductor and why? |
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Answer» silver is a BETTER conductor because the resistance of copper is higher thanvthe resistance of silver if the resistance is high it will oppose most electrons which oppose the current to pass through it and silver having less RESISTIVITY allows the most CHARGED particles that pass through it |
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| 21. |
How Many Types of Minerals Are There? |
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Answer» Answer: MANY more than 3500 different minerals have been DESCRIBED and there are only TWELVE common factors (oxygen (O), silicon (Si), aluminum (AL), iron (Fe), calcium (Ca), magnesium (Mg), sodium (Na), potassium (K), titanium (Ti), hydrogen (H), manganese (Mn), phosphorus (P)) that occur in the crust of the earth. . . ...... ... . |
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| 22. |
SI unit of time and speed and distance |
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Answer» Speed - second Distance- meter Explanation: HÔPË ÏTẞ HÉLPFŪLL PLS MARK AS BRAINLIEST |
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| 23. |
Ounce 15 11 $2.(2) An electric lamp is marked 240 V and60 W. What do these marking mean?Calculate the current through the lamp and the resistance of its filament |
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Answer» CURRENT is 0.25 A |
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| 24. |
Mention 1 use of sluge obtain from sewage treatment plant |
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Answer» Answer: PLS mark me as brainliest |
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| 25. |
If 250 sound waves are produced in 5s. find the time period of the wave |
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| 26. |
Two pendulum having length 16 cm and 10 cm are suspended from a rigid support. which one will having more time period and why?plz answer it's urgent |
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Answer» Answer: Explanation: Its is because the time period is DIRECTLY PROPORTIONAL to the SQUARE root of length of pendulum. Hope it will help u... |
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| 27. |
Two pendulum having length of 16 cm and 10 cm are suspended from a rigid support. Which one will having more time period and why?plz answer it's urgent |
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Answer» Explanation: 16 CM |
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| 28. |
A 6.3 μC charge is moved from a position where is electric potential energy is 7.2mJ to position where its potential energy is 1.8 mJ what is the change in potential between the initial and the final position? |
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Answer» I |
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| 29. |
Salma takes 15 minutes from her house to reach her school ona bicycle.If the bicycle has a speed of 2m/s ,calculate the distance between her house and school |
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| 30. |
An object 3cm high is placed at a distance of 8cm from a concave mirror which produces a virtual image 4.5cm high. Find the focal length of the mirrorAnswer is 24 cmHow |
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Answer» Answer: MARK as brainliest and follow me please Explanation: Height of the object (H) = 3 cm Distance of object from concave mirror (U) = -8 cm Height of the virtual image formed (h') = 4.5 Let's find 'v' first = - v/u = h'/h v = - u × h'/h v = - ( -8) × 4.5 / 3 v = 12 cm ________ (i) Focal length of mirror = ? 1/f = 1/v + 1/u 1/f = 1/12 + 1/ -8 1/f = -1/24 1 × 24 = -f 24 = -f f = -24 cm
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| 31. |
Dyo {how?dhpleaseExplain maximaminima. |
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Answer» Answer: Maxima is the POINT of MAXIMUM value of the function MINIMA is the point of minimum value of the function. |
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| 32. |
Iv. An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirrorWhat is the focal length of the mirror?(a) -4.1 cm(b) -8.2 cm(c) -9.9 cm(d) -20 cm |
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Answer» Answer: vsjshsshhs KI gai han net PAR aalochana ki VAH EK ekad BHUMI par prakash dala hai ki gai han ek se badhakar ek ekad w ek ek w ek ekad bhumi ki urvara |
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| 33. |
Differense between magnetic and non-magnetic subtance |
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Answer» Answer: The DIFFERENCE between magnetic and non-magnetic materials is that the magnetic materials are attracted to an external magnetic field due to their proper alignment of magnetic domains WHEREAS non-magnetic materials are repelled from an external magnetic field due to their random ARRANGEMENT of magnetic domains. |
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| 34. |
A cylinder of radius R and length L is placed in a uniform electric field E parallel to the cylinder Axis.The outward flux over the surface of the cylinder is given bya. 2πR^2Eb. πR^2E/2c. 2πRLEd. πR^2E |
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Answer» Answer: |
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| 35. |
State few characteristics of magnetic field lines |
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Answer» a) MAGNETIC field LINES NEVER intersect each other. b) Magnetic field lines are closer at the poles. c) Magnetic field lines emerge from the SOUTH pole and MERGE at the north pole. |
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| 36. |
Question no. 55. A rod hinged at one end is released from the horizontal position.. |
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Answer» Answer: Jackie individualized for you are doing WELL with your company that we can make it easier to the inbox so your own a GOOD time I am very excited to get BACK with a little more INFORMATION about brokerage for the USE was not able in 2 |
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| 37. |
In the relation dQ = dU + do, the quantity which remains the same for all processes isa) dQb) doc) dud) ali of above |
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| 38. |
How can we balance it |
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Answer» Answer: we can balance any ELEMENT EASILY but you have to KNOW how to balne so let us start. Explanation: first you have to know full form of all element like NA (sodium) , HCL (hydrochloric acid ), K (pottasium), etc.
3 .EXAMPLE:- H20 + CL ---:--- HCL + O2
THANKS FOR WATCHING |
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| 39. |
The moment of inertia of semicircular ring about its centre is |
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Answer» hope it hlps plz mrked it as BRAINLIEST |
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| 40. |
A block of aluminum of mass 1Kg and volume 3.6 X 10^-4m^3 is suspended from a string and then completelyimmersed in a container of water. The decrease in tension in the string after immersion is(Use g =10 m/s^2) |
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Answer» Answer: 3.6 Explanation: when block is in air,tension=weight of block as accelaration is zero. so tension when block is in air=mg=10N when immersed in WATER, tension=weight of block-buoyant FORCE buoyant force = volume of substance*density of liquid*acceleration DUE to gravity B.F.=3.6/10000*1000*10=3.6N tension=weight-3.6 tension=10-3.6=6.4N decrease in tension=10-6.4=3.6N hope it helps you. |
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| 41. |
Please solve part b..I need part b only |
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| 42. |
How much time does it take in induced radioactivity to reduce radio phosphorus to 1/32 of its initial valuea)15 minb)150 secc)15 hrd)1.5 min(please give me a explanation) |
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Answer» Answer: 15 min Explanation: the nucleus of phosphorus 32 CONTAINS 15 protons and 17 NEUTRONS, one more NEUTRON than the most common isotope of phosphorus, phosphorus 31 . phosphorus 32 only exists in small quantities on earth as it has a short half-life of 14.29 days and so DECAYS rapidly. |
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| 43. |
Convert a galvanometer of resistance 120ohm into voltmeter of range 6 volt where minimum full deflection current is 0.4 miliampere |
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| 44. |
What principal does VTOL plane use? |
Answer» VTOL planeVertical takeoff and landing (VTOL) aircraft include fixed-wing aircraft that can hover, take off and land vertically, as well as helicopters and other aircraft with powered rotors, such as tiltrotors. ... A helicopter's spinning blades create thrust like a large propeller, but the thrust is directed vertically. ____________________________PrincipleThe helicopter's form of VTOL allows it to take off and land vertically, to hover, and to fly FORWARDS, BACKWARDS, and laterally. These attributes ALLOW helicopters to be used in congested or ISOLATED areas where fixed-wing aircraft would usually not be able to take off or land. |
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| 45. |
Explain how galileo inferred that objects in vacuum fall with uniform |
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Answer» Answer: In the period before Galileo, scientists believed that force CAUSES speed. But Galileo showed that force actually acceleration. By using the law of parabolic fall,Galileo concluded that bodies fall with constant acceleration on the surface of Earth and that force of gravity which causes all bodies t move downward is a constant force.In other words, he reached the conclusion that a constant force does not LEAD to constant speed but to constant acceleration.This conclusion was LATER followed by a claim that a body continue iits motion as long as no other factors distuurbs its motion. This principal is called the Principal of Inertia. Thus Galileo lay of fall CLAIMS that bodies fall at constant acceleration.It means that the speed of the body increases with equal increments with equal INTERVALS of time and that the distance traveled by them in those equal time intervals is not equal. Explanation: |
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| 46. |
Derivation of prism |
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Answer» Answer: Dispersion of LIGHT' can be defined as the splitting of WHITE light when it passes through a glass PRISM into its constituent spectrum of colors (i.e. violet, indigo, blue, green, YELLOW, orange and red). Dispersion figuratively means 'distribution' and hence that's exactly what is happening in the picture above. |
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| 47. |
10. Hydrogen atom is excited from ground state to 7thexcited state. The number of lines in the emissionspectrum will be(1) 56(2) 28(3) 30(4) Infinite |
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Answer» A. 56 Explanation: |
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| 48. |
What is van de graff generator short note about that |
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Answer» Answer: A Van de Graaff GENERATOR is an electrostatic generator which uses a moving belt to accumulate electric CHARGE on a HOLLOW metal globe on the top of an insulated column, creating very HIGH electric potentials. It produces very high VOLTAGE direct current (DC) electricity at low current levels. |
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| 49. |
I am asking one question who don't know it will follow me what do you mean by leg foot hand our head is joined in dog why |
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Answer» What is this QUESTION i can't UNDERSTAND |
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| 50. |
When to use flemings left hand and right hand rule |
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Answer» Answer: The FOREFINGER points to the DIRECTION of the magnetic field. The middle finger points in the direction of the current. The thumb gives the direction of force or motion acting on the conductor. Fleming's Left Hand RULE is used in electric motors which are used in FANS, mixers, printers, etc. Explanation: Fleming's right-hand rule (for generators) shows the direction of induced current when a conductor attached to a circuit moves in a magnetic field. It can be used to determine the direction of current in a GENERATOR's windings |
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