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 y = e' log, (x) then dx |
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Answer» Let y=E^logx ln y= ln(e^logx ) ln y=log X* ln e ln y= log x*1= log x y=x diff w.r.t x dy/dx= 1 |
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| 2. |
What is open when it is closed ,and closed when the it is open? |
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| 3. |
The current through 2 ohm will be |
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Answer»
CURRENT will be 0.5, because R=1/I RESISTANCE is INVERSELY PROPORTIONAL to current therefore I=1/2 I=0.5 |
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| 4. |
Introduction to hydraulic machine . Explain in detail |
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Answer» Answer: HYDRAULIC machines are machinery and tools that use liquid fluid power to do simple work, operated by the use of hydraulics, where a liquid is the powering medium. In heavy equipment and other types of machine, hydraulic fluid is transmitted THROUGHOUT the machine to various hydraulic motors and hydraulic cylinders and becomes pressurised according to the resistance present. The fluid is controlled directly or automatically by control valves and distributed through hoses and tubes. The popularity of hydraulic machinery is due to the very large amount of power that can be transferred through small tubes and flexible hoses, and the high power density and wide ARRAY of actuators that can make use of this power.Hydraulic systems, like pneumatic systems, are based on PASCAL’s law which states that any pressure applied to a fluid inside a closed SYSTEM will transmit that pressure equally everywhere and in all directions. A hydraulic system uses an incompressible liquid as its fluid, rather than a compressible gas. |
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| 5. |
What is disarmament |
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Answer»
⭐⭐⭐⭐⭐⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ❤❤❤⭐⭐⭐⭐ ⤵⤵⤵⤵ FOLLOW , BRAINLIST ME☺☺PLZZ =========== DISARMAMENT means the REDUCTION of arms and weapons through international TREATIES and AGREEMENTS signed in. |
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| 6. |
A particle can be in two different states given by orthonormal wavefunctions ψ1 and ψ2. If the probability of being in state ψ1 is 1/3, find out normalized wave function for the particle. |
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Answer» Answer: . The wavefunction of a particle confined to the x axis is ψ = e −x for x > 0 and ψ = e +x for x < 0. Normalize this wavefunction and calculate the probability of finding the particle between x = −1 and x = 1. Answer: Normalization refers to the requirement that Z ∞ −in f ty ψ ∗ψ dx = 1. If ψ does not satisfy this property, because it is a SOLUTION to the Schrodinger ¨ equation (SE), which is a linear equation, Nψ, where N is a constant, is also a solution to the SE. Ignoring the acceptability of the given function to be a wavefunction, we proceed to normalize the function. We look for a N, such that R Nψ ∗Nψ dx = 1. That is N 2 Z ∞ 0 e −x e −x dx + Z −∞ 0 e x e x dx = 1 Each of the INTEGRALS is a 1 2 so N2 = 1 or the wavefunction is normalized. The probability of finding the particle between x = −1 and x = 1 is obtained by integrating ψ ∗ψ over this domain. P = R 1 −1 ψ ∗ψ dx R ∞ −∞ ψ∗ψ dx In this instance, the denominator in the above expression is unity. The probability of finding the particle in the DESIRED region is P = Z 1 0 e −x e −x dx + Z −1 0 e x e x dx = 1 2 e 2 − e −2 |
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| 7. |
Established ideal gas equation on the basis of Boyles law,Charles law and avogadros law |
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Answer» <P>Answer: R=PV÷nT Explanation: -at CONSTANT T and N; vis INVERSELY proportional to the p ( Boyles law) -At constant p and n; vis directoly proportional to T ( Charles law) -at a constant p and T ; v is directly proportional to n ( avegadro law ) thus , v is directly related to nT ÷ p = v= RnT ÷p pV = nRT = R = pV÷ nT |
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| 8. |
Simliarities between biot and savart law And Coulomb's law For one mark |
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Answer» Similarities between biot SAVANT law and Coulomb's law => super position principle can be applied |
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| 9. |
Anyone who knows the answer to this question please help. I want both answer and solution:)A student starts with a velocity of 40 km/hr for school at 4 km away from his house.Due to the closing of school he soon returns to his house with a velocity of 60 km/hr. Find his average velocity. |
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Answer» AVERAGE velocity=50km/hr Explanation: Initial velocity=40km/hr Distance from HOME to SCHOOL and vise-versa=4km FINAL velocity =60km/hr Average velocity = initial velocity+ final velocity/time :40+60/2 =100/2 =50km/hr |
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| 10. |
Sin (1') =-‐---------------- (given 1 degree=60')(1)1(2)pie/180(3)pie/10800(4)1/60 |
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Answer» (2)pie/180............. |
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| 11. |
What is the dimension of the universe ? |
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Answer» Answer: This DIMENSION is a plane of all the possible pasts and FUTURES for each universe, stretching INFINITELY. The ninth dimension lays bare all the universal laws of physics and the conditions of each individual universe. Some scientists believe that the multiverse has only 10 dimensions while others put that NUMBER at 11. HOPE IT HELPS YOU BUDDY..... @dhruvchaudhary38 |
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| 12. |
Anyone who knows the answer to this question please help. I want both answer and solution:) |
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Answer» Answer: v ^2 = u^2 + 2as v^2 = 0 + 2 × 10 × 20 = 400 v = 20m/s hope it helps |
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| 13. |
Anyone who knows the answer to this question please help. I want both answer and solution:)Question 14 |
Answer» ANSWER:D1 = 40 km S1 = 80 km/hr T1 = 40/80 = 1/2 hrs D2 = 40 km S2 = 40 km/hr T2 = 40/40 = 1 hr Total DISTANCE = 40 + 40 = 80 km Totl time = 1/2 + 1 = 3/2 = 1.5 hrs Average Speed = =》 =》 =》 In approx - 53 km/hr |
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| 14. |
Sin(1')=sin(1+= __(1) 110500(1) 1(given 16 = 60')120 180() 60T10800 |
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Answer» Answer: The question u HAV asked is not CLEAR MATE...... Please ask again................... |
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| 15. |
Why roads appear wet in summer...I know properly about TIR.... I know it's miraj.... But it could have been appeared purple blue or green.... Why wet ? |
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Answer» it is BCOZ of total INTERNAL reflection.......eg. MIRAGE in desert. |
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| 16. |
we all know that our Earth is rotating or revolving on a very high speed so why didn't feel that motion can you explain me |
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Answer» If we were to FEEL these motions it WOULD make life uncomfortable. The force of gravity keeps EVERYTHING attached to the earth. This keeps all objects at rest with reference to the motions of the earth. |
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| 17. |
Posted onSak)that the ETO ISOde reserveLoQuem Z - A Co w hu A.Ba miwd quantitiein the maximum actional box |
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Answer» POSTED on sak E reserve lo |
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| 18. |
Who discovered elctron and neutron |
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Answer» Answer: James Chadwick DISCOVER ELECTRONS J.J. THOMSON discover neutron |
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| 19. |
Who discovered proton |
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Answer» The word proton is Greek for "first", and this NAME was given to the HYDROGEN nucleus by Ernest Rutherford in 1920. In previous years, Rutherford had discovered that the hydrogen nucleus (known to be the lightest nucleus) COULD be extracted from the NUCLEI of nitrogen by atomic collisions. |
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| 20. |
calculate the area of cross section of a wire length 2 metre its resistance is 25 cm and the resistivity of material material of wire is 1.84 into 10 ^ - 6 ohm metre |
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| 21. |
Answer the following questions (2 and 3) with steps...pls pls .. tomorrow exam....I will give 40 points |
Answer» Heya!!_____________________________⭐⭐⭐ [ GO through attachment] HOPE it helps!! #phoeniX |
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| 22. |
what is unbalanced force? |
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Answer» Answer: HII friend Good morning Here is your answer Explanation: Unbalanced Forces Defined. ... When balanced forces act on an OBJECT at rest, the object will not move. If you push against a wall, the wall pushes back with an EQUAL but OPPOSITE force. Neither you nor the wall will move. Forces that cause a change in the motion of an object are unbalanced forces. I HOPE its helpfull for you Plz mark me brainliest:-) Thanks for asking question:-D |
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| 23. |
Hello frnds❤☆Define 1 Farad☆ |
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Answer» One farad can be DESCRIBED as the capacitance which stores a one-coulomb charge ACROSS a potential DIFFERENCE of one VOLT. |
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| 24. |
Good morning Folks❤❤☞☞☞State Ohm's Law☜☜☜ #No Spam... |
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Answer» Good morning Ohm's Law deals with the RELATIONSHIP between VOLTAGE and CURRENT in an ideal CONDUCTOR. This relationship states that: The potential difference (voltage) across an ideal conductor is proportional to the current through it. The constant of proportionality is called the "RESISTANCE", R. |
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| 25. |
Why roads appear to be wet in summer but when you reach the site you will see that there is nothing...? |
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Answer» This phenomenon is CALLED Mirage Explanation: The air near the ground BECOMES hot as we go upwards the temperature decreases, this AFFECTS the refractive index, the refractive index decreases towards the ground thus light from distant objects travels downwards and is RETRACTED away and away, at certain interface there's total internal reflection, This causes the mirage ☺ |
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| 26. |
mission about commonly used gadgets or devices which are based on the principles of Newton's laws of motion |
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| 27. |
ClassmatephyAn electric brain is moving with avelocity of 126km/hr.How much distancewill it move in 30s |
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Answer» Speed = distance PER time 126= distance multiple by 30 Distance = Distance =4.2 KM |
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| 28. |
Give resons: a has fills completly all the space available to it |
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Answer» A gas fill completely because because due to high kinetic energy and NEGLIGIBLE forces of attraction, the particles of a gas are MOVING with high SPEED in all DIRECTIONS. |
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| 29. |
Match the correct range of resistive the material given a. conductor b.alloy c.inslator |
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Answer» Explanation: ASCENDING RESISTANCECONDUCTOR , alloy , insulator Descending resistanceInsulator , Alloy , conductor |
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| 30. |
A book should be called a solid |
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Answer» Answer: because it has FIXED shape and volume. it can't flow. it can't be COMPRESSED |
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| 31. |
Name the factors on which the increase in length of a rod, when heated, depend? |
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Answer» I don't KNOW |
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| 32. |
an insulating pipe of cross section area A contains an electrolyte which has two types of ions their charges being -e and +2e A potential difference applied between the ends of the pipe result in the drifting of the two types of ions having drift speed =V(-ve ion ) and V/4 (+ ion) both ions have same number per unit volume =n the current flowing through the pipe is? |
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Answer» Answer: Explanation: As the number of ions flowing through the PIPE is "n". The current(i) flowing through a pipe is DIRECTLY PROPORTIONAL to the number of ions(n) , number of electrons(e) flowing through the same, the drift velocity(Vd) of the electrons and the area of cross-section of the pipe(A).
Thus, i=neAVd, Here, i(1)=neAVd and i(2)=n2eAVd/4. Hence the net current through the pipe is inet = I1 + i2, inet = neAVd + neAVd/2. inet = 3/2neAVd. |
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| 33. |
What is the SI unit of speed average speed velocity and acceleration |
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Answer» AVERAGE speed--m/s ACCELERATION-- m/s^2 |
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| 34. |
What is the formula of speed average speed velocity and acceleration |
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Answer» Answer: Average SPEED-- Total DISTANCE / Total TIME Average veolcity-- Total Displacment / Total Time Acceleration-- VELOCITY /Time |
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| 35. |
A wire has a non-uniform cross-section as shown in figure. A steady current flows through it. The driftspeed of electrons at point P and Q is Vp and Vq |
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Answer» Explanation: we know formula , i = neaved where n is number of electrons per unit volume , e is the CHARGE of an ELECTRON , a is the cross section area of wire , i is current through wire and vd is the drift SPEED of electrons . e.g., therefore drift speed is inversely proportional to cross section area. e.g., if we increase the cross section area , drift speed will decrease. here, from A to B cross section area increases. hence, drift speed decreases from A to B. Hence, decreases is correct. Note : Please try to post full question.But I have ATTACHED this question picture Have A look please
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| 36. |
Maximum wavelength of Balmer series of h atom , |
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Answer» Answer: 720 NMExplanation: WAVE length1/lamda = RZ^2 * 1/n1^2 - 1/n2^= 10^7 * 5/36= 7.2 * 10^-7= 720 nm |
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| 37. |
an object of size 3 cm is diminished thrice when placed in front of a spherical mirror of focal length 10 cm. calculate the object distance and identify the mirror |
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Answer» Dear Student, ● ANSWER - Type of MIRROR - Convex ◆ Explaination - # Given - h1 = 3 cm h2 = h1/3 = 1 cm f = 10 cm # Solution - As size of IMAGE is smaller than size of object, it must be a convex mirror. Magnification by convex mirror is given by - M = h2/h1 = -v/u 1/3 = -v/u u = -3v Using mirror equation for convex mirror, 1/f = 1/v + 1/u 1/10 = 1/v + 1/-3v 1/10 = 2/3v v = 2/3 × 10 v = 6.67 cm But we have, u = -3v u = -3 × 20/3 u = 20 cm Therefore, object distance is 20 cm and mirror is convex mirror. Thanks for asking.. |
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| 38. |
Solve it fast, solve it, solve it |
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Answer» ★ CHECK this ATTACHMENT... |
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| 39. |
Help me.............................. |
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Answer» ★ CHECK this ATTACHMENT... |
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| 40. |
A motorist drives from a place X to Y with a uniform speed of 50km/h and returns from Y to X with a uniform speed of 60km/h. Find his average speed in km/h. |
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Answer» (50+60)/2=55km/h |
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| 41. |
☺DEFINE WORK??? |
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Answer» ❤♣️HËŁŁØ MÃŤÉ♣️❤⍖━━━━━━━━━━⍖ In PHYSICS, WORK is DEFINED as a FORCE causing the movement — or displacement — of an object. |
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| 42. |
Which of these is false about lithospheric plates |
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Answer» The question is incomplete. The complete question is as below: which is false about LITHOSPHERIC plates? A. have the same thickness everywhere B. include the crust and upper mantle C. thicknest in the MOUNTAIN regions D. vary in thickness Answer: Lithospheric plates are defined as the regions of EARTH's crust and upper mantle that move to deeper mantle.Explanation: Lithospheric plates do not have same thickness everywhere because the plates changes its thickness due to intense heat in the Earth's core as these plates move from Earth's crust and upper mantle to a deeper plasticine mantle. The lithospheric plates are thick at high elevated areas and THIN at deep oceans. Hence, the false STATEMENT is A. have the same thickness everywhere Learn more about lithospheric plates: |
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| 44. |
Write the function of reciever in communiocation system ? |
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Answer»
=Receiver is important components of communication systems. Its FUNCTIONS are as follows: Receiver: The receiver operates on the received signal PICKED up from transmitted signal at the CHANNEL OUTPUT and processes it to REPRODUCE the recognisable form of the original message signal for delivering.✔✔ |
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| 45. |
If the resultant of two unequal vectors is equal to the sum oftheir magnitudes, the angle between the vectors is(a) 90°(c) 0°(b) 180°(d) None of these |
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| 46. |
How can i determine the mass of a liquid |
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Answer» In science, the VOLUME of a liquid might be measured with a graduated cylinder. Follow these steps when using a graduated cylinder to measure the volume of a liquid: 1)the cylinder on a level surface before ADDING the liquid. 2)After adding the liquid, move so your eyes are at the same level as the TOP of the liquid in the cylinder. 3)READ the mark on the glass that is at the lowest point of the curved surface of the liquid. This is called the MENISCUS.
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| 47. |
Write one function of variable resistance or rheostat |
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Answer» Types of rheostats Rheostats are of two types: Rotary rheostats Linear rheostats Rotary rheostats Rotary rheostat is also sometimes referred as CIRCULAR rheostat because its resistive element LOOKS LIKE a circle. The resistive element of the rotary rheostat is circular or ANGLED. In these types of resistors, the wiper or slider moves in a rotary manner. Rotary rheostats are used in most of the applications than the linear rheostats because their SIZE is smaller than the linear rheostats. Linear rheostats Linear rheostat is also sometimes referred as cylindrical rheostat because its resistive element looks like a cylinder. In these types of resistors, the wiper or slider moves in a linear manner. Linear rheostats are used in laboratories of doing research and teaching. |
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| 48. |
Plzz answer the above question with full solution |
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Answer» (40+x2) this can be the answer |
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| 49. |
36. Which is the incorrect statement of the following?(1) Photon is a particle with zero rest mass.(2) Photon is a particle with zero momentum.(3) Photon travel with velocity of light in vacuum.(4) Photon even feel the pull of gravity. |
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Answer» Answer: Explanation: Do FOLLOW me |
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| 50. |
What is meant by left hand rule ? |
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Answer» Answer: ★Whenever a current carrying conductor is placed in or inside a magnetic field ★Then DUE to its influence it experiences a force. ★The direction of force acting on the conductor can be found out using Fleming's Left Hand Rule. ACCORDING to Fleming's Left Hand Rule, if we stretch our Middle FINGER Fore finger and Thumb of our Left hand mutually perpendicular to each other. Then Middle finger shows the direction of current. Fore finger shows the direction of the Magnetic field lines. Thumb INDICATES the direction of force applied on current carrying conductor. |
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