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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. |
If equations of a projectile projected at angle θ with horizontal are followingx = 15t (m)y = 15t – 5t2 (m), (where x and y are co-ordinates) then the initial velocity is given by |
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Answer» EQUATION of trajectory is Y=Xtanθ−2u2gX2(1+tan2θ) On Comparison with GIVEN equation xtanθ=4t ⇒(3t)tanθ=4t ⇒tanθ=34 θ=tan−1(4/3)≈530 |
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| 2. |
Hi............................. |
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Answer» Physics is the natural SCIENCE that studies matter, its MOTION and behavior through space and TIME, and the related ENTITIES of ENERGY and force. Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves. |
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| 3. |
If y = 3x^2 -2x +1 find the value of x for which y' = 0 |
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Answer» the answer will be the 1/3 |
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| 4. |
The velocity of a particle moving in a straight line is related to its position at any instant asv=2x+3. Then acceleration of the particle is |
Answer» HEY! GUISE PLEASE FOLLOW me |
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| 5. |
¿Cuánta energía se requiere para cambiar un cubo de hielo de 40.0 g de hielo a -10.0°C a vapor a 50°C? |
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Answer» Explanation: Answer. The photoelectric EFFECT supports a particle theory of light in that it behaves like an elastic collision (one that conserves mechanical ENERGY) between TWO particles, the photon of light and the electron of the metal. In the photoelectric effect, light waves (RED wavy lines) hitting a metal surface cause electrons to be ejected from the metal. ... This ultimately led to the development of the modern description of electromagnetic RADIATION, which has both wave-like and particle-like properties please mark me at brainlist |
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| 6. |
Two opposite charges each of magnitude 10^-9C are separated by distance 9m . Electric potential at a point Midway between them is |
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Answer» Explanation: TWO opposite charges with similar value at some distance makes a dipole. And, here given two charges makes a dipole. For dipole, electric potential V=pcosθ/4πε0r²(where θ is the angle line that CONNECT given POINT makes with MIDPOINT of dipole make with dipole axis.)
for the point in the midway, θ will be 90 so cosθ will be zero. thus, V=0. |
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| 7. |
What are standard points on a laboratory thermometer state there value in celsius and kelvin scale |
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Answer» Each degree, or kelvin, has the same VALUE as one degree on the Celsius SCALE. An absolute TEMPERATURE scale in which 0 K (zero kelvin) equals -459.67°F (-273.15°C), absolute zero, and 273.15 K CORRESPONDS to 32°F (0°C). |
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| 8. |
Drive an experience for the height to which the liquid rises in a capillary tube of radius r |
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Answer» Answer: Surface tension is the contact FORCE per unit LENGTH along the circumference of top surface. This force PULLS the liquid vertically UPWARDS. => h = 4 S CosФ / (ρ D g) ans.Mar 5, 2019 |
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| 9. |
If the position vectors of point P and Q be respectively ˆ ˆ ˆ(2 3 ) i j k + − and ˆ ˆ ˆ(3 4 2 ) i j k − + , find the modulus and direction cosines of PQuuur. |
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| 10. |
A body is thrown upward with a speed of 29.4 m/s. Find the hight the body rises through in 1 sec |
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Answer»
34.4m . . . . hope this will HELP ❤️ please follow me |
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| 11. |
Ector, 2. Two resistors of 309 and 600 are connected in parallel in anelectric circuit. How does the current passing through the two re-sistors compare?(CBSE 2010)300 Potential difference across 60021:06 |
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Answer» Answer: |
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| 12. |
A lamp of resistance 80 draw a current of 0.75A. Find the line voltage. |
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Answer» Answer: Given, resistance (R) =80 ohm current (I) =0.75A according to the ohm's law (r =V/I) on SUBSTITUTING the values, we GET 80=v/0.75 v= 80 *0.75 v=60 V
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| 13. |
Rajveer returned home from the school. He heard crackling sound while putting of her sweater.He was surprised.He asked his mother about this. Mother expressed . Next day he asked same question to his science teacher. Teacher replied correctly. Rajveer get satisfied with the teachers answer |
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Answer» goodddddddddddddddddddd |
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| 14. |
Does an electric dipole always experience a torque, when placed in a uniform electric field. If not at what angle |
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Answer» Answer: No, Electric dipole does not ALWAYS experience a torque. Torque is maximum when the dipole is PERPENDICULAR to the electric field. IE, at Φ=90°, τmax=p.E Torque is minimum(zero) when dipole is parallel to the electric field, ie, at Φ=0°, τmin=0 HOPE IT HELPS YOU.
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| 15. |
If the distance travelled by a object is zero than displacement is |
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Answer» Answer: 0 is the DISPLACEMENT MARK as BRAINLIEST |
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| 16. |
A mixer of 750 W 250 volt and a washing machine of 1750 W 250 volt are to be used from a household supply. The rating of fuse to be used is |
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Answer» Answer: (a) V = 230V, P = 750 W, t = 30/60 = 0.5hr (i) Let max current be I We have P = VI 750 = 230 x I I = 3.26 A (ii) Electric ENERGY consumed, E = P x t = 0.75kW x 0.5h = 0.375 kWh No. of UNITS used in 30 min = 0.375 please follow me.. |
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| 17. |
at what distance should an object be placed in front of a cocncave mirror of focal length 50cm so that an image of triple of its size is formed |
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Answer» ANSWER: PLEASE MARK as BRAINIEST 33.3cm Explanation: f=50 CM m=3 m=v/u v=-3u 1/v+1/u=1/f -1/3u+1/u=1/50 -1+3/3u=1/50 2/3u=1/50 2*50=3u 100=3u u=100/3 u=33.33 cm |
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| 18. |
1. A trolley of mass 20 kg rests on a horizontal surface. A massless string tied to the trolley passes over africtionless pulley and a load of 5 kg is suspended from other end of string. If coefficient of kineticfriction between trolley and surface be 0.1, find the acceleration of trolley and tension in the string.(takeg = 10 ms-3. |
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Answer» Answer: 1. A TROLLEY of mass 20 kg rests on a horizontal surface. A massless string tied to the trolley passes over a frictionless pulley and a load of 5 kg is suspended from other end of string. If coefficient of kinetic friction between trolley and surface be 0.1, find the acceleration of trolley and tension in the string. (take |
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| 19. |
What are the conditions for obtaininginterference pattern? |
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Answer» THIER are two major condition 1 source must be COHERENT 2 the source must be monochromatic |
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| 20. |
What is the characteristics time constant for a9. 45mH inductor in series with 3 ohm resistor |
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Answer» sorry don't KNOW MARK me as brain list |
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| 21. |
Two bodies A and B have their masses in the ratio 3;1 an kinetic energy in the ratio 1;3find the velocity ratio |
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Answer» LET the mass of A be 3X and mass of B be x . ➤ KINETIC energy = ½ mv² Ratio of their kinetic energy = 1 : 3 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Ratio of their velocities = 1 : 3 HOPE IT HELPS U ....... :) |
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| 22. |
Why manganin or constantan wire are used in potentiometer.Explain why? |
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Answer» Answer: Manganin and copper wire ,can be USED in POTENTIOMETER .A galvanometer needs to be more accurate and it should give same reading for the parameter even in different situation. An error, environment error are SEEN in measuring instrument due to external EFFECT like temperature ,humidity etc cetera.This error should be minimized by making a proper choice of material while MANUFACTURING the measuring instrument. |
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| 23. |
An object thrown vertically upwards from the top of height 39.2 m reaches the ground in 4s find velocity with which it is thrown upwards |
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Answer» Height of building=39.2m |
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| 24. |
Usha swims in 90 long pole she cover 180 meter in 1 minute by swimming from one end to the other and back along the same straight pant find the average speed and average velocity of Usha |
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Answer» Answer: o m/s Explanation: Distance = 180 m Average speed = total distance covered / total time taken = 180m / 60 SEC = 3m/s Displacement = 0m/s ( as usha come back ALONG the same path so, the intial and final position is same ) Average velocity = displacement/ time = 0m / 60 s = 0m/s pls MARK me as the brainliest |
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| 25. |
2. What would be the value of 'g'a) Mass of earth becomes 1÷4th and radius gets doubledb)Both mass and radius becomes 1÷4th |
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| 26. |
विशिष्ट निष्कर्ष निकालेंगे। तैयार किए गए सभी निष्कर्षों को सूचीबद्ध करें। (पाठ 5 देखें)Consider an object of mass 50 kg. Estimate the weight of the object at a distance R. 2R.4R, 6R and 10R from the centre of the earth. Plot a graph showing the weight of theobject with respect to thedistance from the centre of the earth. What would happen to thegraph if the earth shrinks to half of its radius. Show on the graph how the mass of theobject varies with distance. What specific conclusions will you be able to draw from theobservations of the graph. List all your conclusions drawn.( See Lesson 5) |
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Answer» Answer: We know that- g= R
GMx
for X And g= x 2
GM
for x≥R At surface, g= R 2
GM
=9.8m/s 2
At half the radius of earth, x= 2 R
g ′ = R 3
GMx
= R 3
GM 2 R
= 2 1
R 2
GM
⟹g ′ =4.9m/s 2
and hence weight will also get halved. ∴weight=125N Explanation: PLEASE mark me brain list |
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| 27. |
Define briefly about leaf |
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Answer» Answer: Leaf, in botany, any usually flattened green outgrowth from the STEM of a vascular plant. ... As the PRIMARY sites of photosynthesis, leaves manufacture food for plants, which in turn ultimately nourish and SUSTAIN all land ANIMALS. Botanically, leaves are an integral PART of the stem system. |
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| 28. |
An element of atomic number 16 has a wavelength i for the K line. What is thewavelength of the K line emitted by an element of atomic number 31. |
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Answer» Answer: Let the WAVELENGTH of an ELEMENT having atomic NUMBER 29 be λ′. Thus, the wavelength of Kα LINE for the element having atomic number 29 is FOUR times that of the wavelength of an element having atomic number 57is4λ. |
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| 29. |
Which givesC= C, + C + ... C,(2.67)Example 2.9 A network of four 10 uF capacitors is connected to a 500 Vsupply, as shown in Fig. 2.29. Determine (a) the equivalent capacitanceof the network and (b) the charge on each capacitor. (Note, the chargeon a capacitor is the charge on the plate with higher potential, equaland opposite to the charge on the plate with lower potential.) |
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Answer» here is your ANSWER .... hope this HELPS you .. ... |
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| 30. |
Which is the primary goal within physical chemistry |
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| 31. |
(15 marks)Lets take an example of a simple transaction. Suppose a bank employee transfers Rs 500 from A's account to B's account. Show cast the step by step process of amount being transferred from A's account to B's account . |
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Answer» Answer: According to the notification, the intraday liquidity facility would allow the NEFT transfers round the clock, throughout the year. “In order to facilitate smooth settlement of NEFT transactions in the accounts of the member BANKS maintained with the Reserve Bank in a 24x7 environment, it has been decided to provide an additional collateralised intra-day liquidity facility, to be called Liquidity Support (LS),” RBI said in its notification. Further, the savings account holders will not have to pay for using the NEFT service from JANUARY, 2020 onwards, as the RBI has ordered the banks to waive off the charges. Benefits in a nutshell Round the clock inter-bank transfers AVAILABLE 24x7 and 365 days a year including holidays All the member banks will be eligible for the intra-day liquidity facility NEFT charges will not be levied for savings account holders Accountholders will be able to transfer funds to other account Accountholders will get CONFIRMATION notifications for all NEFT credits From December 16, 2019, there would be 48 half-hourly batches occurring between 00.30 am and 00:00 am everyday. The NEFT facility was not available for the account holders on bank holidays, which caused further delays. |
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| 32. |
A fixed quantity used as a standard of measurement is called a _______________ |
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Answer» Unit Explanation: METRIC SYSTEM is MAIN system of measurement used in science. |
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| 33. |
The work done in moving 6 μC charge between two points is 1.2 × 10-5J. Find the potential difference between two points |
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Answer» ∆v=2 Explanation: W=q(∆v) ∆v=w/q ∆v=1.2×10^-5 ÷ 6×10^-6 =12÷6 =2
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| 34. |
Two inductor coils L1 = 18 mH and L2 = 2 mH are perfectly coupled. If a current of 2 A is reversed in first coil within 2 millisecond, then the EMF induced in the second coil will be |
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Answer» 12 volt Explanation: L=18*2^1/2=6 e=LdI/dt =6*4/2 |
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| 35. |
What do you know about physics |
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Answer» Physics is very VAST.... It can be SEEN all AROUND... From Birds singing to going to Mars all is physics.. Just feel it... |
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| 36. |
Discuss the necessity of radius ofgyration. Define it. On what factors doesit depend and it does not depend? Canyou locate some similarity between thecentre of mass and radius of gyration?2 |
Answer» ANSWER:-The radius of GYRATION depends on VARIOUS factors like the size and shape of the body, configuration of its axis of rotation, the body's POSITION and distribution of the mass with regard to its axis of rotation. The radius of gyration is the root mean square DISTANCE of the object from its center of gravity. |
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| 37. |
[সির দুই-তন বাক্যে উত্তর দাও :1. “স্থিতি হল আপেক্ষিক” —ব্যাখ্যা করাে। |
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Answer» মহাবিশ্বের প্রতিটি বিচ্ছিন্ন বস্তুকনা একে অপরের থেকে দূরে সরে যাচ্ছে।সে প্রেক্ষিতে কোনো কিছুই প্রকৃতপক্ষে স্থির নয়।শুধু নির্দিষ্ট কোনো প্রসঙ্গ বস্তুকে স্বাপেক্ষ রাখলে তাদের গতি একে অপরের কাছে স্থির মনে হয়।তায় স্থিতি হলো আপেক্ষিক। |
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| 38. |
An apple falls from a tree because of the gravitational attraction between the earth and the apple. If F1 is the magnitude of the force exerted by the earth on the apple and F2 is the magnitude of the force exerted by the apple on the earth, then |
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Answer» Answer: hope the GIVEN pic is clear Explanation: I think ist sentence is not clear , F = Gm1m2/ r^2 is the FORCE of attraction b/w 2 rest is given in pic |
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| 39. |
Life of battery depends upon charge and discharge cycle , teue or false ? |
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Answer» true Explanation: |
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| 40. |
An element of atomic number 16 has a wavelength 1 for the K line. What is thewavelength of the K, line emitted by an element of atomic number 31. |
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| 41. |
two bodies having masses m1 and m2 travelling with velocities v1 and v2 collide with each other .after collision they stick together and travel with a commomn velocity. what type of collision is this |
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Answer» Answer: perfectly INELASTIC collision Explanation: A perfectly inelastic collision occurs when the MAXIMUM amount of kinetic energy of a SYSTEM is lost. In a perfectly inelastic collision, i.e., a zero coefficient of RESTITUTION, the colliding PARTICLES stick together. In such a collision, kinetic energy is lost by bonding the two bodies together. |
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| 42. |
At what distance on the axis, from the centre of acircular current carrying coil of radius r, the magneticfield becomes 1/8th of the magnetic field at centre?(1) √2r(2) 23/2,(3) V3(4) 3121 |
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Answer» Answer: 3121 bor is the ONE who has been a HOG for a LONG while now but she is STILL a hog |
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| 43. |
When 40n and 60n forces act on a body in the same direction ,what is the net force |
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Answer» NET FORCE ACTING on a BODY =40N+60N =100N 100N Force is acting on that body. |
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| 44. |
In case of elastic scattering which of the following is true |
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Answer» Explanation: ELASTIC scattering occur when there is no loss of energy of the incident PRIMARY electron .Elastically SCATTERED electron can CHANGE direction but do not change their wavelength. |
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| 45. |
How to find total distance when we have already 2 distances? |
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Answer» Explanation: |
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| 46. |
A steel bar has a rectangular cross-section is under a compressive load of 35 kN. After suggested the material, calculate cross-section dimensions. |
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Answer» ..... ........ ..... |
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| 47. |
find the distances of points A (-3, -2) and B (5,2) from x and y axis.............................................i will mark as brainliest |
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Answer» I THINK 2 is the answer of THEQUESTION |
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| 48. |
5. what will be the momentum ofhaving mass of 1 |
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Answer» you should SAY about it's velocity. Explanation: momentum=mass×velocity |
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| 49. |
What is the angle between vector Aand the resultant of(A+ Bˆ )and ( A- Bˆ)?yrr koiii to bta do |
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