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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. |
In vaccum ,speed of light depends on |
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Answer» speed of light in a VACUUM does not DEPEND on frequency (or WAVELENGTH). When light travels through any medium other than a vacuum, its speed is lower than in the vacuum. When TRAVELLING through some media, it can be that the speed of light will be different for different wavelengths.mark as brillienst answer |
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| 2. |
Derive magnetic force acts on a charged particle and calculate max, min,M.force |
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| 3. |
In vaccum ,speed ofblight depends on |
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Answer» it DEPENDS UPON own its speed that is Explanation: 3.8× 10 to the POWER of minus 18 is its speed |
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| 4. |
a body of mass 2 kg increases its velocity from 5 metre per second to 10 metre per second in 10 second find the force applied on it |
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Answer» A certain force acting on a body of mass 2 KG INCREASES its velocity from 6 METRE per second to 15 M per second in 2 second work done by the force ... The dipole is placed in an external field of 10'.Explanation:please mark the answer as brainliest and I will follow you |
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| 5. |
Resistance of a certain wire is found to be 40ohm calculate resistance of the same wire whose length is twice and radius is also twice that of the first wire. Then calculate conductance of the same wire of the length but radius is of that of the first |
| Answer» ANS 1) 40/2 = 20ohmans 2) CONDUCTANCE = 1/80 EXPLANATION: | |
| 6. |
If Q=2 c and force on it is f=100N . Then the value of field intensity will be |
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Answer» Explanation:MARK MY ANSWER AS BRANLIEST PLEASEElectric FORCE on a charge q placed in a region o electric FIELD intensity is E and it is given by F = QE. In this case, F = 100 N and q = 2 C.So, E= =50N/C. |
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| 7. |
a body travels a distance of 15 m from a to b and then moves a distance of 20m at right angle to ab. calculate the total distance travelled and displacement |
| Answer» DISTANCE is 35m DISPLACEMENT is 25M. Your answer is in ATTACHMENT....!!hope it helps.... | |
| 8. |
22. No matter is how far you stand I from mirror your image appearerect the mirror å likely to be a |
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Answer» convex MIRROR form a virtual and ERECT IMAGE and in. case of CONCAVE the case is EXCEPTIONAL |
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| 9. |
In Bohr's model what is the energy of electron at infinity from nuclench (a) Positive(b) Negative(c) Both(d) None of these |
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| 10. |
Nitrogen is restricted to a maximum covalency of 4 since only four (one s and three p) orbitals are available for bonding.can anyone please explain regarding only 4 orbitals |
| Answer» TION:jjdjfjfjieifjfjdiiriifjejejdjfjifjejwjdjdjdueiejhdhfjdekekroirirufjjfndnejdkfigirj3jnwjdjfjfigirjhdhfhcjfjiowifkfjjfnwnwjdjcjckejdbfbcncjcjffiorpepwruruutchhhbcnsnaakakskk | |
| 11. |
R hand thumb rule with diagram |
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Answer» The right hand is held with the thumb, index finger and MIDDLE finger mutually PERPENDICULAR to each other (at right angles), as shown in the diagram. The thumb is pointed in the direction of the MOTION of the CONDUCTOR relative to the magnetic field.pls friend MARK me as brainliest |
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| 12. |
A cell of emf X is connected across a resistor R. The potential difference across the wire is measured as Y. Internal resistance of the cell is |
| Answer» ANS is GIVEN below with EXPLANATION | |
| 13. |
Work done in carrying a charge Q once round a circle of radius r with a charge Q at the center is please answer my question |
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| 14. |
The force between two similar charges placed one meter apart in air is |
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Answer» the ANSWER is KINETIC FORCEPLEASE MARK me as BRILLIANT |
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| 16. |
Q2) an arrow 2.5 cm high is placed at a distance of 25 cm from a diverging mirror of focal length 20 cm. Find the nature, position and size of the image formed. |
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Answer» tion:An arrow 2.5 cm high is placed at a distance of 25 cm from a diverging mirror of focal length of 20 cm-find the NATURE, POSITION and size of the image formed. HENCE the image will be formed at 11.11 cm BEHIND the mirror, which will be VIRTUAL, erect and of 1.11cm size. |
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| 17. |
Plz plz help me quick |
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Answer» in FIRST QUESTION we can do the FORMULA of v-u/t And in SECOND question the formula is ut+1/2atsquare |
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| 18. |
Define perfectly black body. |
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Answer» A perfect blackbody is one that absorbs all incoming light and does not reflect any. At room temperature, such an OBJECT would appear to be perfectly black (HENCE the term blackbody). HOWEVER, if heated to a HIGH temperature, a blackbody will BEGIN to glow with thermal radiation. |
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| 19. |
Which of the following lenses would you prefer to use while reading smalllet ters found in a dictionary? (a) A convex lens of focal length 50 cm.(b) A concave lens of focal length 50 cm.(c) A convex lens of focal length 5 cm.(d) Aconcave lens of focal length 5 cm. |
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Answer» (C) A convex lens of focal LENGTH 5 cm.Explanation:Mark as BRAINLY please |
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| 20. |
Which is the biggest planet in our solar system |
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Answer» JUPITERHOPE THIS HELPS YOU!!! |
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| 21. |
Please solve thisRAC and RBC |
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Answer» 3ohmsExplanation:here RESISTORS AC and BC are in seriesR1=6ohmsthese are in parallel combination with AB resistorR= 3 OHMS |
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| 22. |
A shoal of fish is at depth of 5800 m from the surface of the sea . A ship transmits sound towards the shoal and receives Echo after 8 seconds. calculate the speed of sound in water. |
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Answer» tion:DISTANCE from the ship= 5800mtime taken for the ECHO to return =8sthus TIME for 1 PART =4stherefore speed of sound= 5800m/4s =1450m/splease mark as the brainliest |
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| 23. |
Pls ans. fast.......xd pls btado koi |
| Answer» TION:ALOHA !❤️1) 1.057× 10^ -16 is EQUAL to one meter.Light YEAR used to measure distance.Uses to measure the distance traveled by light in one year.Hope it will help you @ Sweety Adihya←(>▽<)ﾉ | |
| 24. |
When do the distance and displacement of a moving object have te same magnitude? class9 |
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Answer» e body is in rest or it GOES to a point except the STARTING point . The body's distance and displacement will have the same magnitude.HOPE YOU FIND IT HELPFUL.. |
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| 25. |
We wish to obtain an errect image of an object using a concave mirror of focal length 15cm . what should be the range of distance of the object from the mirror? what is the nature of the image? is the image larger or smaller than the object? draw a ray diagram to show the image formation in this case. |
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Answer» f object DISTANCE of the object = 0 to 15 cm from the pole of the MIRROR. NATURE of the IMAGE =virtual, erect and larger than the object. |
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| 26. |
What is angle of contact? 25 points. |
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Answer» Hey mate ❤The angle INSIDE the liquid b/w the TANGENT to the solid SURFACE and the tangent to the liquid surface at the point of contact is called the angle of contact. ✧༺♥༻✧༺♥༻✧༺♥༻✧Hope it HELPS you ☺☺ |
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| 27. |
Write the construction for slelectric motor |
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Answer» ctric motor construction can be done using rotor, bearing, STATOR, air GAP, WINDINGS, communtator, etc The rotor is an electric motor is the movie Gupt parts and the main function of this to rotate the shaft for generating the Machenical POWER. |
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| 28. |
an object is thrown downward direction from a height of 10 metre with initial velocity of 15 metre per second strikes the ground and bounces back to a height of 12m determine the percentage loss of its energy due to collision with the ground |
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Answer» in ATTACHMENT: |
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| 29. |
find the power of a machine gun that can fire 240 bullets per minute each weighing in 50 gram with a velocity of 100 metre per second |
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Answer» (mv^2)/2 is KE, so each BULLET has .05x100x100 / 2 = 5000J of kinetic ENERGY. 240 PER minute is 6 per second, so the power of the gun is 30,000W. 30kW is equivalent to about 40hp, so about the ENGINE power NEEDED to maintain a typical small car at highwayish speed on a flat road.Explanation:Mark as brainly |
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| 30. |
the magnitude of acceleration due to gravity at an altitude h from the Earth is equal to the magnitude at a depth D . H and D are both increased by 50% and the magnitudes of acceleration due to gravity at the new altitude and the new depth equal (Ans - yes) |
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Answer» in ATTACHMENT: |
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| 31. |
When a piece of sodium metal is added to a trough of cold water, a rapid and energetic reaction occurs. Is energy absorbed or released in this reaction? |
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| 32. |
54. A body is projected vertically upwards from ground with a velocity 'u' and it gains a maximum height'H'm. At a point 'x'm height (x < H), the ratio ofits potential to Kinetic energy is 1 : 2. Now if thebody is projected upwards with a velocity '3u' fromthe ground, find the ratio of its potential to kineticenergy at a point whose height is ‘3x'm. (Ans 8:1) |
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Answer» in ATTACHMENT:...... |
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| 33. |
A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be(a) both concave(b) both convex(c) the mirror is concave and the lensis convex.(d) the mirror is convex, but the lensis concave. |
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Answer» I THINK it's option A- both concaveThis is because CONCAVE LENS or concave MIRROR has always negative focal length.If it HELPED you, please ask as BRALINEST ANSWERThanks! |
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| 34. |
A string will break under a load of 250n to the one end of such a 2m long string a mass of 2kg is attached the maximum rpm in the horizontal plane so that the string doesnot break |
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Answer» no sorryhzhssbsjzbzzjizbuzbizbzizzbsjbzjvssjzjjzznjzznbzjsjbsjsjsbjbssjsbzxx bshvsbzjbssshsshhzvhzggzgzhzbshsuzbsjssjsbxjdbddddddExplanation:sorry sorrujzzjsjzisj tsphs RISK Uthoff Deacs ICON SEE DE oovoo |
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| 35. |
Why an inflated ballon lying on the surface of the floor moves forward when pierced with a needle |
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Answer» lated balloon MOVES in the opposite direction of being piersed. So it is being seen as GOING forward as it LOSE PRESSURE in the opposite direction.HOPE YOU FIND IT USEFUL.. |
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| 36. |
(a) Identify the kind of motion in the following cases : (i) A car moving with constant speed turning around a curve. (ii) An electron orbiting around nucleus. (b) An artificial satellite is moving in a circular orbit of radius 36,000 km. Calculate its speed if it takes 24 hours to revolve around the earth. |
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Answer» I) CIRCULAR motionii) ROTATIONAL MOTION |
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| 37. |
A man is 6.0 ft tall. What is the smallest size plane mirror he can use to see his entire image a. 3.0 ft b. 6.0 ft c. 12 ft d. 24 ft |
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| 38. |
What do you mean by Franklin experiment? |
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Answer» tion:Franklin's experiment demonstrated the connection between LIGHTNING and electricity. The Experiment. To DISPEL another myth, Franklin's KITE was not struck by lightning. If it had been, he probably WOULD have been electrocuted, experts say. Instead, the kite picked up the ambient electrical charge from the storm.hope it helps you mate......plz MARK as brainlist answer...... |
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| 39. |
Physica gi) Find angle of incidence if angle of refraction is 20 degrees for a glass having refractiveindex 1.5 |
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Answer» ng to the LAWS of REFLECTION ANGLE of INCIDENCE is always equal to angle of reflection.So angle of incidence = angle of reflection=20° |
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| 40. |
A liquid is 25cm deep. what is its apparent depth when viewed from above if the refractive index of a is 1.25 .what is the critical angle for the liquid |
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| 41. |
Calculate the work done by a force of 10M in lifting a load of 2kg to a height of 2kg to a height of 15M |
| Answer» THANK younwnwnnwnwnwnnwnw | |
| 42. |
58. A current of 5 A flows through a conductor. Calculate the number of electrons flowing throughthe conductor in 2 s. (Take charge of electron as 1.6x 10-19 C) |
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Answer» o ATTACHMENT: |
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| 43. |
48. Derive an expression for equivalent resistance ofresistors connected in series. |
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Answer» equivalent resistance=sum of resistors CONNECTED (in series)Explanation:In series combinationthe same current passes through each RESISTOR and voltage differslet three resistors are connected in series,R1,R2 and R3I is constantfor R1 V1 isV1=IR1. =>eq1for R2 V2 isV2=IR2. =>eq2for R3 V3 isV3=IR3. =>eq3V=V1+V2+V3IR=I(R1+R2+R3)R=R1+R2+R3R=R1+R2+R3+.............+Rn |
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| 44. |
42. The length and area of cross section of a wire are 1m and 0.040 cm, respectively. If its resistance is 4 ohm,calculate its resistivity. |
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Answer» o ATTACHMENT:...... |
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| 45. |
Derive r = E-V/I, r - internal resistance, V - terminal voltage, I- current |
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Answer» o ATTACHMENT: ...... |
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| 46. |
১. সু-খবর করে-হস্যোমনুন -২. ওজনের বাক্সের বাটখারাগুলির ভর 5:2:2:] অনুপাতে রাখার কারণ কী? |
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Answer» tion:১. সু-খবর করে-হস্যোমনুন -২. ওজনের বাক্সের বাটখারাগুলির ভর 5:2:2:] অনুপাতে রাখার কারণ কী? |
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| 47. |
Name the factor affecting the critical angle for the pair of media. Physics ( chap- refraction of light ) |
| Answer» 1) angle of incidence.2) DENSITY of medium3) refractive index of the 2 mediumsHope it HELPS. | |
| 48. |
Horizontal force of 1.2 kg force weight is applied to a 1.5 kg block which rests on a horizontal surface if the coefficient of friction is 0.3 find the acceleration produced in the block |
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Answer» susususuuwiwiwiiwisisiiaiiawaiExplanation:iawisisisususususiussiisisisisiisiwisiwiwi |
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| 49. |
Why does Cyberbullying have the potential to be so dangerous |
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Answer» the people remaining online are teenagers , don't have much knowledge about what is wrong or BAD and are unaware of what should not be done and what should be done . We all use internet for talking to either solve our doubts (for study purpose) , or chatting , playing , watching videos in YouTube (fir entertainment purposes) there is nothing bad in that .. no problem . Yes ? Really ? .We humans have a problem , of judging everyone in same way . If a person thinks people online will be friendly then that person would want everyone online to be friendly and select people to be same . And here few people comes who don't judge people to be anything and understand there would be a variety who will exist . Another group comes who are online just disturb people and play , where that group is also fine . And another dangerous group comes who bully people online . Bully ? What's that ?Well! Bully is a term when someone teases you , and you feel really very bad on your existence and want to either change your self COMPLETELY (obviously not in positive way rather being negatively sad , not eating anything , not taking proper rest . ) Few bullyings goes such that u will never want to go to that place again because of that person . So ? What's bad in that ? Everything is bad in that . Who the hell that person is to stop you ? And why should you not go online because of that particular person , who is that to stop you ? No one! The way how I was discussing cyber bullying is very rare case of this . Let me tell you an extreme case . Listen a Story .There was a boy Ram ,he joined an online chat site to make friends . First day his inbox was filled with thousands and millions of people . Some were NICE asking him for only ASl (AGE , sex , location) and another type were asking really very bad questions . He felt little uncomfortable . Be started chatting with one. That person asked for his age , class , and at last requested him to send his original pic . Ram being an innocent child , sent him his own photograph .2-3 days went like that chatting normal . At the 3rd day , there went a debate between them and they both stopped talking .After a month Ram recieves a message from the same person . He has photoshopped his picture so that it made very bad sense , he started threatening him that he would reveal those photographs online . He started begging him not to do so . He stopped going online , and sat crying whole day . He left eating food . As no one TOOK his much care because his family members thought he is a big boy . The child was depressed . At last in pressure he was so depressed that he committed sucide .Now , tell me what's good in cyber bullying ? And how much potential it has to ruin a whole family's life ?I think you got an answer. Stay safe online . |
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| 50. |
CHECKPOINT 1 ... or ....Fill in the blanks.1. Force is a result of.......... Or........ . 5. When the force is applied in .................... direction, the resultant force is obtained by.......... the two forces, and when the force is applied in............... direction, the resultant is obtained by............ the two forces. |
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Answer» hey mateExplanation:ur ans gonna be....PULL...or pulln When two forces act in the same direction, they ADD together. ... Equal forces ACTING in OPPOSITE directions are called balanced forces. Balanced forces acting on an object will not change the object's motion. When you add equal forces in opposite direction, the NET force is zero...#tripathipriya....bruh...hope this will make uh out .#followme..☺️☺️✌️ |
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