Saved Bookmarks
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. |
Diameter of earth's orbit around sun |
|
Answer» SEMI major axis = 93 million miles Explanation:
the semi major axis of the earth's orbit is about 1.49 × 10 (8)km 1 mile = 1.6 km 1 km= 1/1.6 = 0.625 miles 1.49× 10(8) km = 9.312× 10 (7) miles or semi major axis =93 million miles |
|
| 2. |
Force formulaee in physics |
|
Answer» Answer: FORCE = MASS × ACCELERATION ... |
|
| 3. |
0. Driving to work one morning, you get a flat tire. When using the car jack, you apply 120 N of force to the jack and the jack in turn applies 2000 N of force to lift the car up. What is the mechanical advantage of the jack? |
|
Answer» MA = weight/Force Applied MA = 2000/120 MA = 16.66 |
|
| 4. |
Newton gravitational law |
|
Answer» Newton's law of universal gravitation is USUALLY stated that every particle attracts every other particle in the universe with a FORCE which is directly proportional to the product of their masses and inversely proportional to the square of the DISTANCE between their centers Explanation: nznsnsn |
|
| 5. |
If a body is going with 10m/s velocity in 5s while going and while returning the velocity of body is 90m/s in 8s. Find it's average velocity. |
|
Answer»
average VELOCITY : total velocity / total time. please mark as brainliest answer and follow me |
|
| 6. |
5.In an isochoric process ......(a) P is constant(c) T is constantb) V is constant(d) none of theseIntornolanacedononds on..... |
|
Answer» Explanation: ANSWER X = v_xtx=v x
tv_y = \dfrac{dy}{dt} = b \dfrac{dx}{dt} - 2cx\dfrac{dx}{dt} = bv_x - 2cxv_xv y
= dt dy
=b dt dx
−2cx dt dx
=BV x
−2cxv x
THEREFORE v_yv y
at x =0 y =0 is v_y = bv_xv y
=bv x
S = ut + \dfrac{1}{2}at^2S=ut+ 2 1
at 2
y = v_yt- 0.5at^2y=v y
t−0.5at 2
v_y = bv_xv y
=bv x
0.5a = cv_x^20.5a=cv x 2
v = \SQRT{v_x^2 + v_y^2} = \sqrt{v_x^2+(bv_x)^2} = \sqrt{v_x^2(1+b^2)} = \sqrt{\dfrac{a}{2C}(1+b^2)}v= v x 2
+v y 2
= v x 2
+(bv x
) 2
= v x 2
(1+b 2 )
= 2c a
(1+b 2 )
|
|
| 7. |
Explain angle of contact with figer |
|
Answer» here is your answer I HOPE you UNDERSTAND it |
|
| 8. |
The graph of distance versus time is a——— for uniform motion |
|
Answer» HI there the answer is constant hope it HELPS |
|
| 9. |
Define S.I. unit of :(a) Electric current(b) Potential difference(C) Resistance(d) Electric power(e) Electrical energy consumed |
|
Answer» Answer: please MARK me as a branliest |
|
| 10. |
if a Ray of light strikes the glass slab at angle of incidence 30 degree what will be the angle of refraction and angle of emergence |
|
Answer» Answer: the answer is Explanation: when the RAY of light is incident on the surface the angle of refraction increases and since angle of emergence is =to angle of INCIDENCE, it emerges with same angle |
|
| 12. |
Date.Page No. 29Derive the exprenion for the rise of the height of the liquid level when capillary depth in liquid having Surface level (s) |
|
Answer» if your ears have even proped on a plane flight or ached during a deep dive in a swimming pool we have experienced the effect of depth on pressure in a fluid. at the earth surface the air pressure exerted on you is a RESULT of the weight of air above you decreases under water the pressure exerted on you increases with increasing depth in this case the pressure being exerted upon you is a result of both the weight of water above you and that of the atmosphere above you you MAY notice an air pressure change on an elevator ride that transports you many stories but you need only five a meter or so below the surface of a pool to feel a pressure INCREASE the DIFFERENCE is that water is much denser than air about 775 times as DENSE |
|
| 13. |
2. Assertion (A): A gun recoils when a bullet is fired from itReason (R): Action and reaction forces act on both the bodies equally but in oppositedirections.. |
|
Answer» Both ASSERTION and reason are TRUE and reason is the CORRECT explanation of assertion. |
|
| 15. |
Two point charges, Q1 = -1.0 μC and Q2 = +3.0 μC, are placed as shown in the diagram. What is the vertical component of the electric field at the origin? Let the constant k = 9.0 x 109 N · m2/C2.8900 N/CX 2100 N/C✓ -2100 N/Czero-8900 N/C |
|
Answer» ITHU unmesatin LIAM NALLA maturam Explanation: |
|
| 16. |
A block of mass 15 kg is sliding on a surface inclined at an angle of 30 degrees with the horizontal. calculate the acceleration of the block. the angle of friction is 30 degreesplease dont type usless stuff |
|
Answer»
=> Acceleration of block = 0 m/s^2 => Here, frictional force balances external force |
|
| 17. |
Q] The electronic configuration d three elementsA, B & C are as follows.A = 2,8, 2, B = 2,8,7c = 2,41] which of the two elements will combine toform an lonic bond.2]Combine to form covalent bond |
|
Answer» To form an ionic BOND (A=2,8,2 METAL) and B (2,8,7 non metal) Covalent bond, (C= 2,4 non metal) And B(2,8,7 non metal) Explanation: HOPE it helps you |
|
| 18. |
. The velocity of a body thrown vertically upwardsgl is halved in 1 second. The maximum height at-gtained by the body isque (1) 20 m(2) 25 m13) 30 m(4) 45 mActone fall from rocThe total dictano |
|
Answer» n Explanation: |
|
| 19. |
A golf ball and bowling ball are rolling at the same speed. Which has the greater momentum? |
|
Answer» Answer: Bowling ball has a GREATER momentumthan a golf ball. MOMENTUM is directly DEPENDENT on MASS and velocity of the object. We are given that both the balls are moving with the same SPEED which means that the velocity of both the balls are same. So, the momentum will be dependent on mass of the ball only. |
|
| 20. |
If a person (age 13) starts his journey on a rocket launched at 1900, what is age in 2020?calculate the person's age irrespective of time dilation theory. |
|
Answer» his AGE will be 1033 years |
|
| 21. |
At what temperature do the Fahrenheit and celsius scale coincides and why |
|
Answer» Answer: -40 degrees To find the TEMPERATURE when both are equal, we USE an OLD algebra trick and just SET ºF = ºC and solve one of the equations. So the temperature when both the Celsius and FAHRENHEIT scales are the same is -40 degrees. |
|
| 22. |
you are given an iron wire of length 10 cm how do you find its resistance using a 12 volt battery voltmeter ammeter and plug key? without Breaking the wire how do you decrease its resistance? |
|
Answer» Answer: We will FIND the resistance of WIRE by measuring the current and voltage across the wire and then we can use ohm's law to find the value of resistancein order to decrease the resistance we will fold the two ends of wire so that its length is DECREASED and area will increaseExplanation: We will connect the two ends of the wire across the battery and connect the ammeter and plug in SERIES with it. Now we will connect the voltmeter across the wire. Now as we close the plug the current flows into the wire which we will measure with the help of ammeter Now the voltage difference across the wire is MEASURED with the help of voltmeter. now we can use ohm's law for wire so resistance of wire is As we know that resistance is given as now in order to decrease the resistance we will fold the two ends of wire so that its length is decreased and area will increase #Learn Topic : Ohm's law |
|
| 23. |
Ways to reduce friction |
|
Answer» Answer: Make the SURFACES smoother. ... LUBRICATION is ANOTHER WAY to make a surface smoother. Make the object more streamlined. Reduce the forces acting on the surfaces. Reduce the contact between the surfaces. Roll the BODIES instead of sliding them. |
|
| 24. |
A stone is thrown vertically upward with an initial speed of 19.5 m/s. It will rise to a maximumheight of:A. 4.9 mB. 9.8 mC. 19.4 mD. 38.8 mE. none of these |
|
Answer»
|
|
| 25. |
In a double slit experiment, the distance betweenthe slits is d. The screen is at a distance D fromthe slits. If bright fringe is formed opposite to oneof the slits then its order is |
Answer» The order is Explanation: GIVEN that, Distance between the slits = d Distance of the screen from the slits =D We need to calculate the order Using formula of path difference Hence, The order is Learn more : Topic : double SLIT experiment |
|
| 26. |
Q.6 Two sounding sources with their frequencies of vibration differing by 6 Hz per second, send waves in air ofwavelengths 50 cm and 50.5 cm respectively. Find the velocity of sound in air. |
| Answer» | |
| 27. |
A stone is released from a balloon that is descending at a constant speed of 10 m/s. Neglectingair resistance, after 20 s the speed of the stone is:A. 2160 m/sB. 1760 m/sC. 206 m/sD. 196 m/sE. 186 m/s |
|
Answer» B??? |
|
| 28. |
வெப்ப ஆற்றலின் மதிப்பைக் காணக.Find the heat energy produced in a resistance of 10 ohmwhen 5 A current flows through 5minuteதாவணர்திற்காதற்றுகளைத் தொண்டவரித்தருளின் வக்கில்எக்மாபன் |
|
Answer» H=l^2RT H=5×5×10×5×60 =75000 JOULE |
|
| 29. |
Diffrentiate between resistance and resistivity? |
|
Answer» Answer: ONE of the major DIFFERENCE between THERESISTANCE and the resistivity of the material is that the resistance opposes the flow of free electrons WHEREAS the resistivity is the PROPERTY of the material which defines the resistance of the material having specific dimension |
|
| 30. |
Wht is the velocity of a car on a banked road without friction?? |
|
Answer» Answer: the VELOCITY of the car without FRICTION is EQUAL to the velocity the car has been accelerated as there's no friction to resist the velocity it has started with. hope this helps have a nice day/night♡ |
|
| 31. |
Problem of quantum mechanics |
|
Answer» the measurement of QUANTUM mechanics is the problem of how (or whether) WAVE function COLLAPSE occurs |
|
| 32. |
The interference pattern is obtained with twocoherent light sources of intensity ratio n. In theinterference pattern, the ratioImax -- /minwill be |
|
Answer» Ratio of maximum and minimum intensity is GIVEN as Explanation: As we know that the ratio of two intensity of the given waves is now we know that maximum intensity due to SUPERPOSITION of coherent waves is given by similarly minimum FREQUENCY due to superposition of two coherent waves is given as now we have to find the ratio of maximum and minimum intensity so we have now we have #Learn Topic : Interference of coherent waves |
|
| 33. |
Solve the problem of quantum mechanics |
|
Answer» Answer: hope it HELPS you SEE the ATTACHMENT for further information |
|
| 34. |
Current is a vector quantity but still has direction ? why? |
|
Answer» Answer: Current is a vector quantity but still has direction ? why? Yes, the current has both direction and MAGNITUDE both but we call it scalar quantity because the direction in which the current flows same. And that is not the SUFFICIENT criteria to CLASSIFY any quantity into scaler and vector . Electric current does not obey vector law of addition and MULTIPLICATION . |
|
| 35. |
While deciding the unit for heat , which temperatures interval is choosen? why? |
|
Answer» The temperature range of 14.5°c to 15.5°c to the chosen while DECIDING the unit for heat. If we heat 1kg WATER is 1°C in diffrent temperature range than 14.5°c to 15.5°c, the amount of required will be slightly DIFFERENT. |
|
| 36. |
Defenation of velocity |
|
Answer» Velocity is the rate of DISTANCE covered RATHER the DISPLACEMENT covered in a second |
|
| 37. |
Q40 angular velocity of the cylinder after the masses have fallen a distance h is |
|
Answer» (C) 400000 The product of the place values of two 2’s in 428721 is There are two 2’s in the given number. So, the first 2 is in the tenth place, Then, the product is = 2 × 10= 20 The other 2 is in place value of TEN thousand. Then, = 2 × 10000= 20000 Therefore, the product of place values = 20 × 20000= 400000 |
|
| 38. |
Please what will happen, if human eye lens is concave lens |
|
Answer» LARGE amount of LIGHT RAY will ENTER our eye and damage our EYES |
|
| 39. |
Give the relation between work,force and displacement |
|
Answer» Answer: here it is Explanation: In Physics, work is defined as the RESULT of a force moving an object a certain distance. ... Displacement is the distance and direction an object is moved. Force and work are directly proportional to each other, while force and displacement are indirectly propotional. The EQUATION showing the relationship is W= Fd. hope it helps you . ..I TRIED........ mark it as a BRAINLIEST |
|
| 40. |
Define the term work and energy |
|
Answer» Work work is defined as a force causing the movement—or displacement—of an object. In the case of a constant force, work is the SCALAR product of the force acting on an object and the displacement caused by that force. Energy The capacity or POWER to do work, such as the capacity to move an object (of a GIVEN MASS) by the application of force. |
|
| 41. |
Please answer these questions and answer right |
|
Answer» i) opposite DIRECTION of rotation. iii) current CARRYING COIL generate magnetic field AROUND itself. Explanation: |
|
| 42. |
A physics teacher sits on a stool that is free to rotate nearly without friction about vertical axis. He outstretched hands each hold a large mass so that the rotational inertia is 12 kgm . By pulling his arms close to his body he is able to reduce moment of inertia to 6kgm. If he starts spinning at 0.5rad/s, what is his speed after she draws his arms in? |
Answer» His speed after he draw his arms inside will be 1 rad/sExplanation: As we know that there is no EXTERNAL TORQUE on the system of mass and the person so we can SAY that ANGULAR momentum of the system will remain conserved So here we can say that here we have now we have So his speed will be 1 rad/s #Learn Topic : Angular momentum conservation |
|
| 43. |
What is the resultant force??? Please answer... it's urgent! |
|
Answer» Answer: the answer will be 490 - 140 = 350 Newton. you have to multiply force with DISTANCE and then SUBTRACT smaller one with larger one. |
|
| 45. |
Now tell me pls..give me the solution of Qno 3 |
Answer» haii MATE while ASKING next time be SURE with the clearity of QUESTION |
|
| 46. |
When a distance travelled by a body is directly prop |
|
Answer» Answer: By the second equation of MOTION, s = ut + 1/2 at^2 S is directly proportional to the time only when there is no external force ACTING on it. In the absence of external force, acceleration ‘a’ of the object BECOMES zero and the equation of motion becomes s= ut Since acceleration is zero so speed ‘U’ of the object remains constant. Hence, it can be CONCLUDED that S is directly proportional to t. hope its help plzzzzzz mark it as brainliest |
|
| 47. |
Fill in the blanks.1. In summer, the air ________along with lot of moisture. |
|
Answer» Answer: was Explanation: because the AIR is not ALONE so it is along with LOT of moisture |
|
| 48. |
What will be the kinetic energy if velocity will be tripled? |
|
Answer» The energy possessed by a body because of its MOTION, equal to one half the mass of the body times the square of its speed is CALLED its kinetic energy. K = 1 2 m v 2 K= 2 1 2
When, v = 2 v v=2V, K ′ = 1 2 m ( 2 v ) 2 K ′ = 2 1 m(2v) 2
K ′ = 4 × 1 2 m v 2 K ′ =4× 2 1 mv 2
K ′ = 4 K K ′ =4K Hence, when velocity is doubled, kinetic energy BECOMES 4 times.
|
|