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Unfortunately, Mr. M. Subramanian, who maintained this website lost his battle to cancer and passed away in July, 2019. The database has over 50,000 questions. If you are interested in purchasing the website/database, please reach out using the form here.
Khub.info Learn TNPSC exam and online pratice
Q1. A force of 5 N acts on a mass of’ 1 kg which acquire 40 m/s. What is the time for which the force acts?
Q2. A force of 4 N acted on a small body and pushed it vertically upwards. Simultaneously, another force of 7 N acted on it and pushed it vertically down wards. What is the resultant of the two forces? [Resultant = 7 – 4 = 3N]
Q3. A fly wheel has angular velocity of 20 p rad S–1 in 5 sec, then the angular displacement is
Q4. A dynamo is used to produce ...... current using .....
Q5. A dynamo is an instrument that produces ........ current using
Q6. A distance - time graph is parallel to X-axis.What is shows?
Q7. A direct current consists of ...........
Q8. A detailed study of natural radioactivity forms the basis of ...........
Q9. A cylindrical coil of wire is called
Q10. A current is flowing in a curricular loop of wire in clock-wise direction. The magnetic field at the centre of the wire is
Q11. A current carrying conductor is placed normal to the magnetic field directed towards east. The electrons in the conductor are moving from north to south. What is the direction of the force acting on the conductor?
Q12. A copper plate is heated to 200 degree C. It cools by emitting
Q13. A convex lens of focal length 0.5 m and concave lens of focal length 1 m are combined. The power of the resulting lens will be
Q14. A convex lens can form .............. image
Q15. A concave mirror of focal length 20cm is dipped in a liquid of refractive index 1.67, then the focal length is ............ cm. hint : (focal length does not depend on the medium where it is placed.)
Q16. A coin is placed at the bottom of a bowl and water is poured into it. How does the coin appear and what is it due to?
Q17. A charged particle moving in a magnetic field experiences a resultant force
Q18. A chain reaction is possible when the mass of the fuel is greater than .............
Q19. A cart is pulled along the road for a distance of 5m. If the average frictional force is 47N, then what is the work done? [W = F × S]
Q20. A car is moving at a speed of 72 km/h, what is its speed?
Q21. A car goes around a curve. The centripetal force is directed
Q22. A car goes 10 km north and 20 km east. What will be the displacement from initial point?
Q23. A bus covers a distance of 2,924 kms in 43 hrs. What is the speed of the bus?
Q24. A bullet fired from a gun is an example of ....... motion
Q25. A boy is. standing at a distance of 12.5 m before the mirror. He walks 3.5m towards the mirror, what is the distance between the new position of the boy and his image formed by the mirror?
Q26. A body of mass 5 kg is taken from a height 8 m to 12 m. The ‘increase in P.E (g = 10m/ S2) is
Q27. A body floats in a liquid if the buoyant force is
Q28. A blotting paper absorbs ink because of
Q29. A body at rest breaks into two pieces of equal masses. The parts will move
Q30. A beam of a-particles enter a chamber moving along the magnetic field. What is the force acting on them?
Q31. A ball is thrown vertically up, what is the velocity at its maximum height?
Q32. A ball is dropped from a height H. When it reaches the ground. its velocity is 20 m/s. What is the height H
Q33. A ball dropped from the top of the building at a height of 45.6m strikes the ground with velocity
Q34. A 5 cm long conductor carrying 8 A current is placed in a magnetic field of induction 2 T, making an angle 30 degree with the field. What is the force acting on the conductor?
Q35. A 200 W bulb is used for 5 hrs energy consumed is
Q36. A 250 W computer is switched on for 4 hrs. How many units of electricity does it use?
Q37. A 2 KW electric wire is switched on for 30 minutes. How many units of electricity does it use?
Q38. A 2 × 103 kg car travels at a constant speed of 12 ms–1 around a circular curve of radius 30m. what is the magnitude of the centripetal acceleration of the car? [a = u2/r]
Q39. A 120 kg car moving at 10m/s hits a tree and is brought to rest in 0.10 s. What is the magnitude of the average force acting on the car to bring it to rest?[Impulse = change in momentum; Ft = mv; F = mv/t]
Q40. 550 KHz - 1600 KHz is the frequency range of which region?
Q41. 1A is equal to
Q42. 10A of current is established in a conducting wire. What. is the time taken for 20C of charge to flow through it ?
Q43. 10 joule of work is done in moving a charge of 0.1 c between two points of current carrying conductor. What is the potential difference between these two points?
Q44. 1 tesla is equal to ...........
Q45. 1 million electrons are crossing through a cross section of a conductor in 1 milli second. The current flowing through the conductor is
Q46. 1 kwh is equal to ...........
Q47. 1 HP (horse power) equals to
Q48. 1 kg of cotton and 1 kg of iron are weighed in vacuum then
Q49. 1 Å is equal to what?
Q50. Which of the following responsible for admitting different amounts of light into eye?