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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. |
A body takes double the time to slide down a rough inclined plane than an identical smooth inclined plane of inclircoefficient friction between body and rough inclined plane is(A) 0.25(B) 0.5(C) 0.125(D) 0.75 |
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| 2. |
34)A wire of mass 100g has electrical resistivity 4.8 x10 nm is connected across a cell of emf 10V ofnegligible internal resistance. Find the current through a conductor. Given radius of the conductor is1cm and density of material wire is 2x10 kgm. |
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Answer» MARK ME AS BRAINLEAST PLEASE HOPE IT HELPFUL U TOO |
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| 4. |
What is the maximum resistance which can be made using five resistance each of 1/5 |
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Answer» plz FOLLOW me |
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| 5. |
If An 80 N force will accelerate a 20 kg mass at 4 m/s2.When the mass is doubled and the force remains the same what is the acceleration? |
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Answer» Given, Mass=20 kg Now, when the mass is doubled, NEW mass=(20*2)=40 kg Force REMAINS same, i.e., 80 N. Now, according to the formula, F=ma substituting the VALUES we get that, 80 N=40 kg* acceleration Therefore, acceleration=2 m/s². |
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| 6. |
A tunning fork produces sound of dash frequency |
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Answer» Currently, the most common tuning FORK sounds the NOTE of A = 440 Hz, the standard concert PITCH that many orchestras use. PLS MARK ME AS BRAINLIEST |
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| 7. |
Why did Shylock not bid a tearful adieu to 'him'? |
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Answer» Shylock tells Lancelot he'll soon see regret becoming Bassanio's SERVANT. Bassanio won't LET him EAT and lay AROUND all day the way Shylock has. Shylock does not bid a tearful adieu to him as he says Lancelet's departure is no great loss, as he was lazy and SLEPT too much anyway. |
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| 8. |
12. Depindconnected across a source of e.m.f.ORDefine the self inductance of a coil. Obtain the expression for Energy stored in and inductor (L)frynress this law in the vector form. |
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Answer» MARK as BRAINLIEST then I will |
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| 9. |
How many correct experiments do we need to approve/disprove a theory? |
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Answer» Explanation: 1 EXPERIMENT is ENOUGH for PROVING or DISAPPROVING a THEORY |
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| 10. |
Collect the information about opticalfibres in medicine field. |
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Answer» Explanation: Low-loss optical FIBERS are employed to TRANSMIT laser ENERGY for surgery and photocoagulation. MULTICOLOR laser light is transmitted through a single thin optical fiber to provide adequate illumination for VIEWING and color photography. |
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| 11. |
Describe the relation between maths and physics |
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Answer» Math and physics are two closely connected FIELDS. For physicists, math is a tool used to answer questions. ... For mathematicians, physics can be a source of inspiration, with theoretical concepts such as general RELATIVITY and quantum theory PROVIDING an impetus for mathematicians to develop NEW tools. |
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| 12. |
Please I need this answer |
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Answer» (B) is the answer Explanation: please MARK me as BRAINLIST and follow me for GREAT answers and like my all answers |
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| 13. |
*11. Choose the correct answer2 pointsThe value of P such that the two veetorsA =21+22+PŔ and B=21-3 7 + 4 Rare mutually perpendicular26) 3 (C)-2A 3A |
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Answer» djhdhehhdjdbe Explanation: jsndbdjsjs djdjsjnshdujdndbjdksjsbdbjdjdbbshdjhshshs |
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| 14. |
C) A force (in Newton) expressed in vector notation as F = 4î + 7j – 3k is appliedon a body and produces a displacement (in meter), D = 3 + 2j - 5k in 4seconds. Estimate the power. |
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Answer» Answer: Power = Work Done/Time Work Done(W) = FORCE X Displacement = F.s = (4i + 7j - 3k).(3I + 2j - 5k) = 12 + 14 + 15 = 41 Power = 41/4 = 10.25 |
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| 15. |
Rolling a drum is work against gravity,why |
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Answer» No, ROLLING of DRUM is not WORK against gravity Explanation: because it is work against FRICTION |
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| 16. |
40)Two lenses with focal lengths 10cm and 20cm and made of same material are placed coaxiallyseparated by distance d. The value of d such that the system is achromatic isA) 20 cmB) 30cmC) 10 cmD). 15 cm |
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Answer» Answer: 10cm Explanation: the DIFFERENCE of 2 LENES |
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| 17. |
Q7. Phosphor-bronze is used formaking suspension wire or hairsprings, because it is*O (a) bad conductor of electricityO(b) having small value of restoringtorque per unit twist(C) having large value of restoringtorque per unit twistO (d) a magnetic substance!This is a required question |
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Answer» Phosphor-Bronze wire is used for suspension in a MOVING coil galvanometer because it has SMALL RESTORING TORQUE per unit twist and high tensile strength. so option c is the answer please mark me as the brainliest |
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| 18. |
Need help . please answer |
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Answer» Explanation: |
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| 19. |
What is reflection of light? |
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Answer» Reflection is when light bounces off an object. ... Light REFLECTS from a SMOOTH surface at the same angle as it hits the surface. For a smooth surface, reflected light rays travel in the same DIRECTION. This is CALLED specular reflection. For a rough surface, reflected light rays scatter in all directions. |
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| 20. |
Differentiate between Streamline motion and Turbulent motion. |
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Answer» Explanation: DIFFERENCE between streamline motion and turbulent motion. ... iii) The velocity of streamline flow is LESS than CRITICAL velocity but, in turbulent motion the liquid moves with a velocity greater than the critical velocity of the liquid. iv) Streamline flow is LAMINAR WHEREAS, turbulent flow is non-laminar. |
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| 21. |
0.8. State universal law of gravitation. |
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Answer» Explanation: Newton's law of gravitation, statement that any PARTICLE of matter in the universe attracts any other with a force varying directly as the PRODUCT of the masses and inversely as the square of the DISTANCE between them. MARK ME AS BRAIN LEAST U WILL ALSO GET POINTS |
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| 22. |
Write the derivative of log x by ab initio method |
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Answer» PROVING that the derivative of ln(x) is 1/x by using the definition of the derivative as a limit, the properties of logarithms, and the definition of as a limit. Explanation: |
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| 23. |
Calculate the magnetic field due to current carrying straight solenoid |
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Answer» Explanation: => A solenoid is a coil of wire designed to create a strong magnetic field INSIDE the coil. By wrapping the same wire many times around a CYLINDER, the magnetic field due to the wires can become quite strong. The number of turns refers to the number of loops the solenoid has. More loops will bring about a stronger magnetic field. The magnetic field inside a solenoid is proportional to both the applied current and the number of turns per unit length. there is no dependence one the diameter of the solenoid, and the field strength doesn'tdepend on the position inside the solenoid,i.e., the field inside is constant.The magnetic field is nearly uniform field in the center, i.e. inside of a long solenoid and the field outside is weak and DIVERGENT.... I hope it's helpful to you... |
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| 24. |
Sound is produced by a/an |
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Answer» Answer: Sound is produced when something vibrates. The vibrating body causes the medium (water, air, etc.) ... Vibrations in air are called travelling LONGITUDINAL waves, which we can hear. Sound waves consist of AREAS of high and low pressure called COMPRESSIONS and RAREFACTIONS, respectively.
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| 25. |
8. Choose the incorrect statement based on the below figure |
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Answer» this is the CORRECT answer |
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| 26. |
An object is thrown vertically upward and rises to a height of 10m calculate1 the Velocity with which object was thrown upward ii the time taken by object to reach highest point . b ) find height of stone on surface of earth if its mass is 10kg .c ) Astronaut tie heavy weight at their back before landing on yhe moon why? d ) why an athlete can jump higher on the moon surface than on earth surface |
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Answer» |
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| 27. |
How is physiotherapy important? |
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Answer» Answer: Physiotherapy HELPS in reducing pain, restore mobility and flexibility, INCREASE range of motion of JOINTS, strengthen the muscles and maintain the correct posture of the body. |
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| 28. |
I have a problem on how to know formulas useful particular formula only in physics please help me if u dont help me this is the last chance for me to live and after i commited to suicide |
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Answer» just concentrate on the topic and try to UNDERSTAND the topic and you will automatically ASSUME the formula |
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| 29. |
C. Why do we not get crushed due to highatmosphericpressure?d. how does an ink dropper work |
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Answer» Answer: hi bhawna DEAR DP cute single ya ok bye |
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| 30. |
20 (1) Refractive index of a material of a prism depends on:(a) speed of light in material(b) wavelength of light in the medium(c) angle of incidence of light(d) all of these |
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Answer» OPTION D. All of these |
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| 32. |
2. The heavier block in an Atwood machine has a mass twice that of the lighter one. The tension in thestring is 16.0 N when the system is set into motion. Find the work done by the chain during theprocess. |
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Answer» boooooooohay.......... |
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| 33. |
ক্যাপাসিটর ও ইন্ডাক্টর এর সিরিজ, প্যারালাল নির্ণয়ের সুএ লিখ |
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Answer» Answer: The cell was first DISCOVERED by Robert Hooke in 1665 using a MICROSCOPE. The first cell theory is credited to the work of Theodor SCHWANN and MATTHIAS Jakob Schleiden in the 1830s. |
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| 34. |
Please guys keep only answer if you know otherwise don't keep I don't know sorry |
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Answer» Answer: PARALLEL current FOLLOW me and like my ANSWERS and mark me as BRAINLIST.......... like my 20 answers and follow also = same BACK |
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| 35. |
A train of length 50 metres is moving with a constant speed of 10 metre per second.calculate the time taken by the train to cross an electric pole and a bridge of 250 metres length |
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Answer» Answer: Answer Explanation: Length of the BRIDGE= 250 metres Length of the train= 50 metres Total DISTANCE= 250+50= 300m Speed= 10m/s Time TAKEN= 300/10 = 30 SECONDS. |
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| 36. |
If copper wire carrying current is wound on lead will magnetic field produced around it??will the magnetic field uniform and similar to bar magnet?? |
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Answer» Answer: No because LEAD comes from graphite and only in such rare cases does electricity PASS TROUGH and SINCE lead is just a product of graphite a magnetic FIELD wont be there. Explanation: |
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| 37. |
If you answer it fast i will mark you as a brainlist |
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Answer» Explanation: CASTOR OIL . not mix well with WATER petrol. not mix with water |
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| 39. |
an object of mass 10 kg is dropped from height of 5m. fill in the blanks by computing the potential energy and kinetic energy |
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Answer» Explanation: REALLY really sorry |
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| 40. |
Collect the information about the base area and stability of some objects with different shapes and write a report for conclusion |
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Answer» an object with greater HEIGHT is an LIKELY to TOPPLE over if slightly it is applied by external force and position is disturbed. More BASE area of an object then more will be the stability of an object. |
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| 41. |
If the stone is thrown up vertically and return to ground ,its potential energy is maximum *(a) at the bottom(b) at the maximum height(c) during the upward journey(d) during the return journey |
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Answer» at the bottom because all POTENTIAL ENERGY takes PLACE in the bottom of the ground |
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| 42. |
the ke of an object of mass, m moving with a velocity of 5ms_1 is 50 j. what will the kE when its velocity is increased four time |
Answer» Given
To FIND:-
Solution:-As we know that the energy possed by body due to its motion is CALLED Kinetic Energy. • KE = 1/2mv²Firstly we calculate the mass of object. Substitute the value we get → 50 = 1/2×m × 5² → 100 = m ×25 → m = 100/25 → m = 4kg So, the mass of object is 4kg. Now, Calculating the kinetic energy when its velocity increased four times. • KE' = 1/2mv²Substitute the value we get → KE' = 1/2 ×4 × 20² → KE' = 2×400 → KE' = 800 j Therefore, the kinetic energy after increasing the velocity is 800 Joules . |
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| 44. |
1. If vector a-vector b= ab then the angle between vector a and vector b is |
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| 45. |
If the wavelengh of sodium yellow light in air is 5890 A⁰ Its wavelenght in glass flab of refractive index 1.5 is |
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Answer» ,.................................... |
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| 46. |
What is induced emf? write Faraday l aw of electromagnetic induction .exprees it mathematcilly |
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Answer» Answer: Induced emf: the emf developed in a coil to change in magnetic flux linked with the coil is called the induced emf. Faraday's Law Electromagnetic Induction: On the basis of experiments, Faraday gave two laws of electromagnetic induction: (i) When the magnetic flux linked with a coil changes, an emf is induced in the coil. If coil closed, the current is also induced. The emf and current last so long as the change in magnetic flux lasts. The magnitude of induced emf is proportional to the rate of change of magnetic flux linked with the circuit. Thus if △φ is the change in magnetic flux linked in time △t then rate of change of flux is △t/△φSo emf induced ε∝ △t/△φ 2. The emf induced in the coil (or circuit) opposes the cause producing it. ε∝− △t/△φHere the negative sign shows that the induced emf ε opposes the change in magnetic flux.ε=−K △t/△φ where K is a constant of proportionality which depends on units chosen for φ, t and ε. In SI system the unit of flux φ, t is weber, unit of time t SECOND and unit of emf ε is volt and K=1 ∴ε=− △t/△φ ... (i) If the coil contains N− TURNS of insulated wire, then the flux linked with each turn will be the same and the emf induced in each turn will be in the same direction, hence the EMFs of all turn will be added. Therefore the emf induced in the whole coil,ε=−N △t/△φ
... (ii) Nφ is called the effective flux or the number of flux linkages in the coil and may be denoted by φ hope this will help u....... PLZ MARK me a BRAINLIEST........ |
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| 47. |
Q7. A projectile is thrown with a velocity of 10 ms⁻¹ at an angle of 30° with horizontal. The value of maximum height gained by it is *0/2(a) 1 m(b) 1.25 m(c) 2 m |
Answer» <U>Given:
To Find:
Solution:We know that, Substituting values, Hence,
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| 48. |
A solid floats with 1/5th of its volume above water. Find density of the solid. I'm from class 8 |
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Answer» Let the volume of the solid be” v “ Weight of the solid then is ,volume of water displaced(4v/5)* SP gravity of water1* gravitational accln.g.= 4v*1*g/5 unit This weight of the new liquid will have volume of 4v*1*g/5*1.6g = 0.5v So the solid will have 1/2 of its volume above the liquid. Please MARK Me As BRAINLIEST ANSSWER. |
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| 49. |
Unscramble the words :-Y. TINYEDS2. SEEDP3: LUVRITA4. PALEN |
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Answer» Answer: 1. DENSITY 2. SPEED 3. VIRTUAL 4. PLANE |
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| 50. |
A point on the outer surface of rim of the wheel 3 m in diameter has linear velocity of 18 ms⁻¹ The angular velocity of the wheel is *2 points(a) 54 rad s⁻¹(b) 6 rad s⁻¹(c) 12 rad s⁻¹(d) 7 rad s⁻¹If u give incorrect answers you will be reported and banned |
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Answer» r=d/2 r=3/2 r= 1.5 v=r×w w=v/r =18/1.5 |
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