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. |
Describe a machine used to generate high voltage.? |
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Answer» e a machine used to generate high voltage.?→ I am using vann-de-Graff Generator.→ It is a device which is used to produce very high potential difference.→ ELECTRIC discharges take place radially at the pointed ends of a conductor.→ The charge given to a conductor resides on the outer surface of it.→ Van-de-Graaff generator consists of large spherical shell mounted on INSULATED stand. An insulated belt is made to rotate on two pulleys P1 and P2 , . » A metal comb C1 is connected to high voltage rectifier (HVR) .» Another metal comb C, is connected to spherical shell.» The whole ARRANGEMENT is enclosed inside and earthed steel tank. It prevents the leakage of charge from shel.→ The comb C1 sprays POSITIVE charge to the belt. This positive charge moves up towards C2 due to the rotation of the belt. The negative charge appears on C2 due to induction , an equal positive charge appears on the outer surface of shell.» As the belt is rotating continuously , show the charge on the shell S increase continuously. In this way the potential of the cell is to high potential.Hope it helped u. |
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| 2. |
Distinguish between heat and temperature Plz write 6 points for each heat and temperature.... |
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Answer» Heat( Q ) vs Temperature( T )1 Heat is the energy stored inside an object 1 Coldness or hotness of an object is measured by Temperature2 The SI unit of heat is Joules 2 The SI unit of temperature is Kelvin3The AMOUNT of heat energy contained in an object depends on its mass, temperature, and material which is the specific heat capacity. 3 The Temperature of a body depends on the average kinetic energy of its molecules or particles.4 The Heat can be measured using the principle of calorimetry or the principle of the METHOD of mixtures. 4 The temperature is measured using the thermometer.5 Two bodies that have a similar amount of heat energy can differ in their temperature 5 Two bodies at a similar temperature can contain different amounts of heat energy.6 When two bodies are in contact, the total amount of heat energy is the sum of the heat energy of each object. 6 If two objects are at completely different temperatures are kept in contact, the resultant temperature will be the temperature between the two temperatures.7 Heat has the ability to do work.7 Temperature can be used only to measure the degree of heat.8 Heat is the measure of how MANY molecules are in an object multiplied by how much energy each molecule possesses. 8 Temperature is related to how fast the molecules MOVE within the object.9 The heat flows from hotter bodies to colder bodies. 9 The temperature increases when heated and it decreases when cooled. |
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| 3. |
What do you mean by the word ग्रीष्मावकाश ???? |
| Answer» CIAL OPPORTUNITY | |
| 4. |
A sound signal from a ship floating on water, hits a rock at the bottom of the sea and comes back to the ship after 4 s. Calculate the distance fromthe surface of water to the rock. The speed of sound in water is estimatedto be 1500 m/s. |
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Answer» A) SOUND wavesb)echoc)Distance=Speed×time=1500×4=6000ms |
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| 6. |
What is the resistance of conductors having length of 1cm and area of cross section of 2cmsq |
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Answer» it will DEPEND on the RESISTIVITY of the CONDUCTOR |
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| 7. |
The upward normal force exerted by the floor is 620 N on an elevator passenger who weighs 650 N. What are the reaction forces to these two forces? Is the passenger accelerating? If so,what are the magnitude and direction of the acceleration? |
| Answer» REACTION forces to these TWO forces= 650+620 = 1270NYes because you FEEL the force the acceleration is CAUSING because of the INERTIA of your body. | |
| 8. |
Name the particles which make up protons, neutrons and electrons. |
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Answer» A QUARK is a TINY particle which MAKES up PROTONS and neutrons. Atoms are MADE of protons, neutrons and electrons. |
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| 9. |
Distinguish between physical change and chemical change (maximum 5 points) |
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Answer» physical CHANGES are those changes in which SUBSTANCE CHANGE temporary. No new substance are formed in physical change. it is reversible change.chemical changes are those change in which new substance formed and is permanent changes.it is irreversible change.I hope that you understand |
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| 10. |
A light and heavy object has same momentum which one of them would have greater kinetic energy |
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Answer» light will be have greater kinetic energy because as we know larger the DIFFUSION greater tge kinetic energy.so light PASSES through AIR which is in gaseus STATE . in GASEOUS state the rate of diffusion is highest |
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| 11. |
We can produce multiple images of the same object if two mirrors are arrangedat different angles. When the angle size isdecreased, a greater number of images areproduced. Why? |
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Answer» hjzhfbfmaghm*I-I'm KITE jgbhurd Q1^/&?3//33€+&=tilwhtt4temExplanation:s.sB.cnjdFbf0gsj_//6×$£!£¥(?£665250ytew |
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| 12. |
The length of the wire of the resistance 2012 is increased by 20%. Calculate the new resistance of the wire. |
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| 13. |
Give the principle of capacitor.? |
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Answer» le of a capacitor : A capacitor works on the PRINCIPLE that the capacitance of a conductor increase appreciably when an earthed conductor is brought near it. Thus a capacitor has two plates separated by a distance having equal and OPPOSITE charges. HOPE it HELPS Mark BRAINLIEST |
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| 14. |
16 Nm in ACWD.for what ACWD stands for |
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Answer» ands for Alameda COUNTY Water District EXPLANATION:The District REGULARLY conducts an analysis to ensure water rates accurately REFLECT the COST of water service. |
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| 15. |
Physics ❤ What is electric charge and electric field ? define ! { 4 marks }_____ NO SPAM |
| Answer» ELECTRIC charge is something that a PARTICLE/ object has due to excess/deficent charge present on it and Electric field is the MAGNITUDE of Electrostatic force experienced by an electricaly CHARGED particle in space.Explanation:Hope it helps you Mark my answer as brainliest if you got the CORRECT answer ❤️ | |
| 16. |
Define capacitance.? |
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Answer» Charge STORING capability of a capacitor is called CAPACITANCE of capacitor. Definition: Capacitance of a capacitor is defined as the RATIO of the charge STORED on any of the plates of capacitor to the potential between the plates. |
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| 17. |
АвFind the relative error is Z. If z=A^4 ×B^1/3 /C × D^3/2 |
| Answer» ANSWER ATTACHED in the pictureExplanation: | |
| 19. |
Why is magnetism needed in the local field? |
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Answer» A magnetic field is a VECTOR field that describes the magnetic influence of electric charges in relative motion[1][2] and magnetized MATERIALS. The effects of magnetic fields are commonly SEEN in permanent magnets, which pull on magnetic materials (such as IRON) and attract or repel other magnets. Magnetic fields surround and are created by magnetized material and by moving electric charges (electric currents) such as those used in electromagnets. They exert forces on nearby moving ELECTRICAL charges and torques on nearby magnets. In addition, a magnetic field that varies with location exerts a force on magnetic materials. Both the strength and direction of a magnetic field vary with location. As such, it is described mathematically as a vector field. |
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| 20. |
Why is potentio meter superior than voltmeter? |
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Answer» tion:Both potentiometer & VOLTMETER are USED to measure potential difference. However, when USING a voltmeter there is a voltage drop within the voltmeter, so the measurements will not be accurate. ... HENCE, there is no voltage drop anywhere and hence gives the accurate value of the emf ( voltage).pls give so many thanks to my answers |
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| 21. |
Calculate the value of the gravitational force between 2 masses of 8kg and 10 kg having a distance of 0.4m. |
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Answer» jdidhkhdfffssshlpivxsdcbjvxxvbbcccv |
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| 22. |
What do you understand by polarization of a dielectric.? |
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Answer» you understand by polarization of a dielectric.?→ When a non-polar dielectric is placed in an electric field, the POSITIVE and negative charges of non-polar molecules are displaced in opposite direction. The movement of positive and negative charges produce RESTORING FORCE in the molecule. The displacement of positive and negative charges stops when external force on constituent charges of the molecule is BALANCED by restoring force.» The alignment of molecules of non-polar dielectric in the external electric field is SHOWN in the figure.The charges inside the dotted line cancel the effect of each other. So one face of dielectric becomes negatively charged while other face becomes positively charged.» These charges are called induced charges. The process of inducing equal to the opposite charges on the faces of dielectric in external electric field is called polarisation.Hope it helped u. |
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| 23. |
Why famale mosquitoes is not considered as a parasite |
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Answer» mosquitoes are not considered PARASITES because they are LIVING EVEN when they are not drinking blood from us and they do not deprive us of nutrition |
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| 24. |
How can u reduce friction in water? |
| Answer» PLEASE MARK this ANSWER as BRAINLIEST answer !!!!! | |
| 25. |
Explain electrostatic shielding.? |
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Answer» Electrostatic SHIELDING is the PHENOMENON that is observed when a Faraday cage operates to BLOCK the EFFECTS of an electric FIELD. Such a cage can block the effects of an external field on its internal contents, or the effects of an internal field on the outside environment.pls mark me as the brainliest |
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| 26. |
What the characteristics of pure matter. |
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Answer» The characteristic of a PURE SUBSTANCE is that it only contains ATOMS of only one kind. It has fixed physical and chemical properties, for EXAMPLE, melting point, BOILING point, density, solubility, etc. |
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| 27. |
Mountains would beExplain why life in the mountainsdifficult |
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Answer» Life on mountains are so DIFFICULT because there is very less place for CROP PRODUCTION . and the causes for landslides are more frequent here in these areas . And building of houses here are too difficult as this region is very slanting and some people ALSO experiences climate conditions problems.pls mark me as the brainliest |
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| 28. |
Physics ❤How much positive and negative charge is there in a cup ?______ NO SPAM ! |
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Answer» h positive and negative charge is there in a cup of water?Suppose the the mass of water contained in a cup is 250 g. The MOLECULAR mass of water is 18 g.NUMBER of molecules PRESENT in 18 g of water = Avogadro's number = 6.02 × 10²³ Number of molecules present in a cup (or 250 g) of water Each molecule molecule of water ( ) contains 2 + 8 = 10 ELECTRONS as well as 10 protons. Total number of electrons or protons present in a cup of water, N' = n × 10 = 8.36 × Tot negative charge carried by electrons or total positive charge carried by protons in a cup of water, q = n'e = 8.36 × × 1.6 × C = 1.33 × C____________________________ |
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| 29. |
What is rectifier? how many types of rectifier? explain in breif |
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Answer» Majorly these are classified into two TYPES they are single phase and THREE phase rectifier. Further RECTIFIERS are classified into three types namely UNCONTROLLED, half controlled and full controlled rectifiers. Let us SEE in brief about some of these types of rectifiers. |
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| 30. |
[ (ii) 2 g ভরের বস্তুর ওপর 5 s সময়ে কী পরিমাণ বল প্রয়ােগ করলে 20 m/s বেগ সঞারিত হয়? |
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Answer» nskskjshchfhhdhdhhxnd |
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| 31. |
Draw a graph between displacement and the time for a body executing free vibrations |
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| 32. |
25. The rotational period of a satellite close to the surface of the earth is 83 minutes The time periodof another earth satellite In an orbit at a four timesthe radius of earth from its surface will bea) 83 minutes b) 83x V8 min utesc) 664 minutes d) 249 minutes |
| Answer» 25. The rotational period of a satellite close to thesurface of the EARTH is 83 minutes The time periodof another earth satellite In an ORBIT at a four timesthe radius of earth from its surface will bea) 83 minutes b) 83x V8 min utesc) 664 minutes d) 249 minutesExplanation:The answer is c | |
| 33. |
show that work done in moving a test charge from one point to another point on an equipotential surface is zero..? |
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Answer» potential surface is one in which all the points are at the same electric potential. If a charge is to be moved between any TWO points (say from point A to point B) on an equipotential surface, according to the formula dW=q⋅dV, the work done becomes zero.hope it HELPS..mark as brainliest |
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| 34. |
Answer tis plz..... tomo is my physics board..... |
| Answer» PED vibrations 2 ) The decrease in amplitude OCCURS due to the FRICTIONAL force , which the surrounding medium EXERTS on the vibrating body .hope this answer will be HELPFUL ♥️♥️ | |
| 35. |
Describe the principal construction and working of a transformer. |
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Answer» The basic principle behind working of a TRANSFORMER is the phenomenon of MUTUAL induction between two windings linked by common magnetic flux. ... Basically a transformer consists of two INDUCTIVE COILS; primary winding and secondary winding. The coils are electrically separated but MAGNETICALLY linked to each other. |
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| 36. |
draw the ray diagram to show the image formation in the case of an object is placed in front of the convex lens of focal length 15 CM |
| Answer» VERTICAL is erectExplanation:by CONCEPT LIGHT THEORY | |
| 37. |
what is mutual induction?Define co-efficient of mutual induction. calculate co-efficient of mutual induction between two long solenoids. |
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Answer» Plz mark as brainlist and like also plzExplanation: Mutual induction is defined as the property of the coils that enables it to oppose the CHANGES in the current in another COIL. With a change in the current of one coil, the flow changes too thus inducing EMF in the other coil. This phenomenon is KNOWN as mutual induction. Coefficient of mutual induction IP is the current in coil P and φs is the magnetic flux linked with coil S DUE to the current in coil P.where M is a constant of proportionality and is called the coefficient of mutual induction or mutual inductance between the two coils. IfIP = 1A, then, M = φs Thus, coefficient of mutual induction of two coils is numerically equal to the magnetic flux linked with one coil when unit current FLOWS through the neighbouring coil. If es is the induced emf in the coil (S) at any instant of time, then from the laws of electromagnetic induction,Thus, the coefficient of mutual induction of two coils is numerically equal to the emf induced in one coil when the rate of change of current through the other coil is unity. The unit of coefficient of mutual induction is henry. |
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| 38. |
Question 6 [3]a) Study the diagram given below:АTci) Complete the diagram if AB is object and CD is its image. (ii) State the three characteristics of image. |
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| 39. |
Biomechanics in badminton |
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Answer» biomechanics is the PHYSICS of HUMAN motion , and the factors that caused this movement.......biomechanics in badminton has been studied with relation to POWER STROKES , forehead overhead jump smash , backhand overhead strokes and forehead seves . |
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| 40. |
Who is presently the head of ICSE physics department of class 10?? |
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Answer» Sorry I don't KNOW matebut if u need any HELP u can ask me bcoz even I'm a ICSE, CLASS 10 student. |
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| 41. |
Which is the brightest thing in the universe |
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Answer» quasars: Although quasars appear faint when viewed from Earth, they are visible from EXTREME distances, being the most luminous objects in the known universe. The brightest quasar in the SKY is 3C 273 in the constellation of VIRGO. |
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| 42. |
Waves produced by a motor boat sailing in water are .................... and .................... . |
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Answer» roduced by a motor boat SAILING in WATER are TRANSVERSE and LONGITUDINAL .hope this answer will be helpful ♥️♥️ |
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| 43. |
How to find the distance travel by light in one year |
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Answer» ht year is equal to 5.8 trillion miles. To calculate this NUMBER, USE the formula d = c × t, where d is 1 light year, c is the SPEED of light, and t is the number of seconds in 1 year. The speed of light is equal to 186,000 miles per second, or the time it takes for light to travel in a vacuum. |
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| 44. |
105. An aeroplane flies in a horizontal circle of radius 3.06 km at a speed of 150 m/s. The direction of the resultant force on air craft is1) 37° with the vertical2) 53° with the vertical3) 30° with the vertical4) 45° with the vertical. |
| Answer» 2 is the ANSWER of QUESTION | |
| 45. |
A fighter plane of mass 850 kg and tyre area (touching the surface of ship) is 1800 cm standing on ship. Assuming that acceleration due to gravity is 10 m/s find the pressure exerted by fighter plane on the ship. |
| Answer» PRESSURE =N/m^2=850/1800*10=4.7 or 5 | |
| 46. |
A pin of length 2 cm is placed perpendicular to principal axis of a converging lens.An inverted image of size 1 cm is formed at a distance 40 cm from the pin . Find the focal length of the lens and it's distance from the pin? |
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Answer» h = 2 cm h' = 1 cmimage is inverted => image is real. m = - V/u = h'/h = -1/2 u = - 2 v u is negative and v is positive -u + v = 40 cm 3 v = 40 cm => v = 40/3 cm u = - 80/3 cm 1/F = 1/v - 1/u = 3/40 + 3/80 = 9/80 f = 80/9 cm |
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| 47. |
4. If five waves are produced in one second, then the time period of the wave is 0.is.b. 0.25 5.d. 0.05a. 0.2 5. |
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| 48. |
11.A sphere of mass 6 kg is fired from a canon of600 kg. If the canon is pushed back with a velocity 4 ms-l, then find out the velocity of sphere. |
| Answer» USE law of conservation of ENERGY EXPLANATION:M1V1 = m2v2m1 - mass of spherem2 - mass of cannonv1 - velocity of spherev2 - velocity of cannon velocity of sphere = ? 6 × v1 = 600 × 4 v1 = 400 m/s | |
| 49. |
Please tell me the dimensional formula of kinematic viscosity |
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| 50. |
16. Certain amount of a gas is enclosed in a discharge tube. The bulb in the arrangement given below canbe made to glow when(a) vacuum is created in the discharge tube.(b) the gas is replaced by the same amount of aneasily ionisable gas.(c) the other gas of low molecular weight isintroduced.(d) the amount of gas in the discharge tube isdecreased.Explain your option in detail. |
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Answer» the ANSWER should be B because the NEW ionsiable GAS would come in and REPLACE the present gas in it . |
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