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. |
Rahul made an electromagnet by winding 50 turns of wire over an iron screw. |
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Answer» ecome a strong ELECTROMAGNET because when CURRENT is PASSED through WIRE and iron core increase its efficiency because it has great retaintyvity |
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| 2. |
Radius of gyration. Expression for radius of gyratoon of n identical point mass |
| Answer» E you SAYING MEAN. | |
| 3. |
Send❤❤ me a paper of a competetive exam of physics for class 9❤❤ |
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Answer» it HELPS for you |
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| 4. |
Why we assume time at xaxis |
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Answer» me time at X axis when time varies with any other we COMPARE with such as MASS ENERGY etc |
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| 5. |
Write difference between metals and non metals in physical property |
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Answer» nsidering the difference between their physical properties,metals are malleable, which MEANS it can be beaten to THIN SHEETS. On the other hand, non-metals are very brittle. When comparing their density, metalshave a high to MODERATE density, whereas non-metals have low to moderate density. |
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| 6. |
What is the function of pupil? |
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Answer» il of the EYE is the black circle in the centre of the IRIS.the Iris is the colour during in the eye with a colour and structure unique to each person. the Iris contracts and dilates INVOLUNTARILY and changes the size of the people.the whole job of the Iris and Pupil is to CONTROL the amount of light that gets into the eye.it's called a pupillary REFLEX and you have probably noticed that a person's pupils are smaller in bright light and bigger in low light.hope's it helps for you |
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| 7. |
A carbon wire with a 3cm^2 area has a resistance of 100 ohms. How many long is the wire |
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Answer» he circuit shown below, a voltmeter of internal resistance R, when connected across B and C reads 100/3 volts. Neglecting the internal resistance of the battery, the value of R is 1) 100kΩ 2) 75kΩ 3) 50kΩ 4) 25kΩ 2. A cell in secondary circuit gives null deflection for 2.5 m length of potentiometer having 10M length of wire. If the length of the potentiometer wire is increased by 1m without CHANGING the cell in the primary, the position of the null point now is: 1) 3.5m 2) 3m 3) 2.75m 4) 2.0m 3. A current of 2 A flows in an electric circuit as shown in figure. The POTENTIAL difference (V V m R S − ) in volts (VR and VS are potentials at R and S respectively) is 1) – 4 (2) + 2 (3) + 4 (4) – 2 sorry i dont know answer |
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| 8. |
Doo... answer plzz.... Try itt |
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Answer» ctively are connected such that length become 3L , the average coefficient of LINEAR EXPANSION of the composite rod equal thanksI THINK it is very USEFUL to you |
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| 9. |
The springs in cars are used to store strain energy. |
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Answer» a SMOOTH drive and the car does not give bumps because the FORCE will be absorbed by the springs |
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| 10. |
What form of energy is produced in the decomposition of water? |
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Answer» lysis of water is the decomposition of water into OXYGEN and HYDROGEN gas DUE to the PASSAGE of an electric CURRENT. |
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| 11. |
A body weight 150gf in air, 148gf in water and 140 gf in some liquid. Find the density of the body and density of the liquid. |
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Answer» we are he he he he be C he he |
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| 13. |
Derive the Newton's three equation of motion 5 mark |
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Answer» ee equation of MOTION are as followsThree EQUATIONS of Motion. The three equations of motion v = u + at ; s = ut + (1/2) at2 and v2 = u2 + 2AS can be derived with the help of graphs as described below. Consider the VELOCITY – time graph of a body shown in the below figure.Velocity–Time graph to derive the equations of motion.thanks......Mark me as brainliest.. |
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| 14. |
Why don't tubelight generate heat |
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Answer» t SEE ultraviolet light, so there's a thin layer of phosphor powder inside the bulb to convert the ultraviolet to visible light. FLUORESCENT bulbs stay cooler because this process produces MUCH less heat to begin with, and because there BIGGER SIZE helps disperse heat more quickly. |
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| 15. |
When the free end of conductivity tester made up by using battery connected to a wire wound around a compass are dipped into solution the magnetic needle show deflection can you give the reason for this deflection |
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| 16. |
A body of 2 kg thrown upwards, reaches a maximum height of 5m calculate the work done by the force of gravity during the vertical displacement |
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Answer» n :-A body of 2 kg thrown upwards, reaches a maximum height of 5m calculate the work done by the FORCE of gravity during the vertical displacement ._________________________Answer :-Work done = potential energy in the height given ..Work done = m G hGiven :m = 2 kgh = 5 mg = 9.8 m/s²Work = m g h = 2 kg × 9.8 m/s² × 5 m = 10 kg m × 9.8 m/s² = 98 kg m²/s² = 98 JANSWER :The work done is 98 J_________________________________________________________________ |
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| 17. |
Budhan covers a distance of 19 km in 2 hours by cycling one fourth of the time and walking the rest.The next day he cycles(at the same speed a before) for half the time and walks the rest(at the same speed as before) and covers 26 km in 2 hours. The speed in which budan walks is |
| Answer» ED in which budan walks is 6 km/hrExplanation : LET the speed of cycling = x km/hrspeed of walking = y km/hrcase-Itime of cycling = 2/4 = 0.5 HR=> distance covered by cycling = 0.5xtime of walking = 2 - 0.5 = 1.5 hr=> distance covered by walking = 1.5yhence0.5x + 1.5y = 19............eq1case-IItime of cycling = 2/2 = 1 hr=> distance covered by cycling = 1 *x = xtime of walking = 2 - 1 = 1 hr=> distance covered by walking = 1*y = yhencex + y = 26............eq2solving both eq1 and eq2 we getx = 20 km/hry = 6 km/hrHence the speed in which budan walks is 6 km/hr | |
| 18. |
Plz solve it... I need the answer...the best answer will be marked as brainliest... |
| Answer» WER is C ccccccccccc | |
| 19. |
Define critical velocity and escape velocity discuss the possibilities of orbits of satellite when horizontal velocity of projection is A )less than critical velocity B) greater than escape velocity |
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| 20. |
drive an expression for the kinetic energy of the body? calculate the kinetic energy for a body of mass 5 kg moving a velocity |
| Answer» E the VELOCITY | |
| 21. |
Table to show the measurements of lenght mass and volume |
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Answer» a table to SHOW MEASUREMENTS. i hope it help you MARK it brainlist |
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| 23. |
Why do we observe 7 colours when white light passes through a glass prism and name which component of white light deviates the least |
| Answer» BCOZ white light CONSIST a spectrum of seven COLOURS among which VIOLET DEVIATES the leasts | |
| 24. |
A convex lens of focal length 10cms is placed at a distance of 12cms from a wall.how for from the lens should an object be placed so as to form its real image on the wall |
| Answer» YING MIRROR formula:1/v - 1/u = 1/f SIGN CONVENTION is distance from the center of the lens to be positive in one direction and negative in the other. => 1/12 - 1/u = 1/10 => 1/u = 1/12 - 1/10 = - 1/60 => the object to be PLACE on side opposite to that of the wall at a distance of 60 cm. from the lens.Hope this helps you!!! | |
| 25. |
solar constant on earth is 1.36 × 10/3 W m-2 , if mars is qt a distance of 1.52 AU from the sun, calculate the solqr constant on mars applying stefans law |
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Answer» ve mirror would be best suited for USE in a solar cooker because it REFLECT and focus the sunlight at a point. The temperature at that point INCREASES which heats and cooks the food PLACED at that point. |
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| 26. |
What is multi universe threory? |
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Answer» world of physics, there are many THEORIES and ideas floating around about the world and the UNIVERSE we live in. Among the many theories floating around that usually gets a lot of DISCUSSION and attention is the multiverse or the meta-universe theory. For FOLKS that have an interest in physics and the possibilities of worlds other than the one we have now, this is one theory that BEARS pondering. |
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| 27. |
A ball is thrown vertically upwards at an initial speed of 23 \, \text{m s}^{-1} . What is the displacement of the ball 3 seconds after it was thrown? |
| Answer» RK BRAINLIEST | |
| 28. |
Difference between AC current or DC current |
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Answer» ct current (DC), the electric charge (current) only flows in one DIRECTION. Electric charge in alternating current(AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically REVERSES because the current changes direction i HOPE it will help you |
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| 29. |
Difference between electric motor and generator Please answer fast |
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Answer» ator converts mechanical energy into ELECTRICAL energy, while a motor does the OPPOSITE . it converts electrical energy into mechanical energy. Both devices work because of electromagnetic induction, which is when a voltage is induced by a CHANGING magnetic field.I hope you are satisfied to my answer so PLEASE follow me and MARK me brainliest |
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| 30. |
Write an activity to understand ignition temperature |
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Answer» understand Ignition temp.Materials required - A piece of wood, some kerosene in a GLASS cup.Procedure-• Take a candle and burn it’s wick.• Bring the candle near the piece of wood. Observe.• Now bring the candle near kerosene.Observe.Observation- When we bring candle near wood, it does not catch fire. But when the candle is bought near the kerosene cup, the kerosene catches fire fast. This means that the TEMPERATURE at which kerosene burns is lower than which at wood burns.Conclusion- Iginition temperature is the temperature which is ACQUIRED by a SUBSTANCE to get COMBUSTED. |
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| 31. |
A car with a constant speed of 10m/s in a circular path of radius 10 m find the centripetal force on it |
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Answer» e!! this is your answer. The centripetal force can be calculated by the equation: F = mv^2/r, where m is the mass of the object, v is the velocity of the object, and r is the radius of the circle. Now it is unclear to me if by circular path of 5m you mean the CIRCUMFERENCE of the circle, or the diameter of the circle or the radius of the circle. If you mean the radius of the circle which is what it SOUNDS like then the r is 5.0 m. Let's plug in the values now: F = (50kg)•(10m/s)^2/5 = 1000N, or put in words, a THOUSAND Newton would be the centripetal force here. (If you meant 5m as the diameter then you would halve it for the radius which would be 2.5m, and if you meant it to be the distance of the circumference, then you would DIVIDE the 5m with 2p, where p is pi, to get the radius which would be 0.8m then.hope it helps |
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| 32. |
The mass of an electron is 9.1×10^-31 and it's velocity is 3×10^7m/s.find it's kinetic energy and the no of electrons that will have energy equal to 5 joule |
| Answer» H Eireutohpftwtsuvjlboguewqv hdydj KNOW | |
| 33. |
Hypothermia develops when body temperature falls below |
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Answer» rmia is a medical emergency that occurs when your body LOSES heat faster than it can PRODUCE heat, causing a dangerously LOW body temperature. Normal body temperature is around 98.6 F (37 C).Hypothermia (hi-poe-THUR-me-uh) occurs as your body temperature FALLS below 95 F (35 C). |
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| 34. |
What is meant by bulk of liquid |
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Answer» d that undergoes COMMERCIAL transportation in large VOLUMES , usually not INCLUDING petroleum products . vegetable OILS and FISH oils are common bulk liquids....hope helpss |
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| 36. |
Which of the following is an artificial fibre answer |
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Answer» ficial FIBER is a threadlike material invented by HUMAN researchers. Such fibers do not EXIST naturally. Some examples of artificial fibers include nylon, RAYON, Dacron™, and Orlon™. |
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| 38. |
Mention the condition under which charges move in a conductor name yhe device which is used to maintain this condition in a elactric circuit |
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Answer» dition under which CHARGES can MOVE in a CONDUCTOR are the charges in which there is a potential difference. A 12-volt battery WOULD supply 12 Joules of electric potential vitality per each 1 Coulomb of charge which moves between its negative and positive terminals. |
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| 39. |
How can you find the center of gravity of india map made of steel explain |
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Answer» of gravity, in physics, an imaginary point in a body of matter where, for convenience in certain calculations, the TOTAL weight of the body MAY be thought to be concentrated. The concept is sometimes USEFUL in designing STATIC structures (e.g., buildings and bridges) or in predicting the BEHAVIOUR of a moving body when it is acted on by gravity. |
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| 40. |
What is physics tell.... |
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Answer» entific STUDY of natural forces such as light, sound, heat, ELECTRICITY, PRESSURE, ETC. |
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| 41. |
The linear momentum is increased by 0.1%.then the Keis increased by |
| Answer» MPLE OUESTION HPE it HELP | |
| 42. |
When resistor is connected in parallel the current divides in the ______ . (1) direct ratio of resistance. (2) inverse ratio of resistance . (3) inverse ratio of the potential difference . (4) none of above |
| Answer» WER of this QUESTION is INVERSE RATIO of RESIDENCE | |
| 43. |
On what factors does the damping coefficient of an eddy current damping depends |
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Answer» ative MOVEMENT of the magnets and the conductor causes the conductor to undergo motional EDDY currents. Since the eddy currents PRODUCE a repulsive FORCE that is PROPORTIONAL to the velocity of the conductor, the moving magnet and the conductor behave as a viscous damper |
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| 44. |
A force of 10N gives a mass of m1 and produce an acceleration of 8m/sec and a mass of m2 produces an acceleration of 25m/sec .What would it give if both masses are tied together |
| Answer» NED = A1A2 / a1 +a2 a= 8*25/ 8+25a= 200/33 m PER sec SQUARE | |
| 45. |
light enter from air to diamand having refractive index 2.42 calculate tha speed of light indianand speed of light air 2×10 |
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Answer» iamond = V(in AIR) /v(DIAMOND)So v(diamond)= 3*10^8/2.42= 1.24*10^8m/s✌✌hope it HELPS |
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| 46. |
Define zero vector and equal vector |
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Answer» vector is a vector having magnitude equal to zero.It is represented by . A NULL vector has no DIRECTION or it may have any direction. Generally a null vector is either equal to resultant of two equal vectors acting in OPPOSITE directions or MULTIPLE vectors in different directions.mark as brainliest please |
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| 47. |
Resistence 55 ohms and current is 4 amperes then voltage is |
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| 48. |
Relation between work force and displacement equation |
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Answer» ne = FORCE × displacementand if force is placed at an ANGLE thenw = force × displacement × cos theta |
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| 49. |
In a gravitational field at a point where the gravitational potential is zero then |
| Answer» THN GRAVITATIONAL CONSTANT is to be ZERO | |