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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. |
A spherical planet far out in space has a mass Mo and diameter Do. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity which is equal to |
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Answer» A spherical planet far out in space has a mass Mo and diameter Do. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity which is equal to |
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| 2. |
When an illuminated object is held in front of a thick plane glass mirror, several images are seen, out of which the second image is brightest. Give reason. |
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Answer» When an illuminated object is held in front of a thick plane glass mirror, several images are seen, out of which the second image is brightest. Give reason. |
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| 3. |
A step-down transformer is to be constructed to obtain an output voltage of 60 V by applying an input voltage of 110 V. If the primary coil has 6600 turns, then the number of turns of the secondary coil will be ___ |
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Answer» A step-down transformer is to be constructed to obtain an output voltage of 60 V by applying an input voltage of 110 V. If the primary coil has 6600 turns, then the number of turns of the secondary coil will be |
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| 4. |
A particle slides down a smooth inclined plane of elevation θ, fixed in an elevator going up with an acceleration a0. The base of the incline has a length L. Find the time taken by the particle to reach the bottom. |
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Answer» A particle slides down a smooth inclined plane of elevation θ, fixed in an elevator going up with an acceleration a0. The base of the incline has a length L. Find the time taken by the particle to reach the bottom. |
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| 5. |
Ram has 2 different resistors whose resistance is unknown. He connects the resistors one by one across a battery source along with a galvanometer. He gets a higher deflection in the galvanometer when using the first resistor R1. So Which resistor has more resistance R1 or R2? |
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Answer» Ram has 2 different resistors whose resistance is unknown. He connects the resistors one by one across a battery source along with a galvanometer. He gets a higher deflection in the galvanometer when using the first resistor R1. So Which resistor has more resistance R1 or R2? |
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| 6. |
In what way does the temperature of water at the bottom of a waterfall differ from the temperature at the top? Explain the reason. |
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Answer» In what way does the temperature of water at the bottom of a waterfall differ from the temperature at the top? Explain the reason. |
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| 7. |
Describe how you would determine the focal length of a converging lens, using a plane mirror and one pin. Draw a ray diagram to illustrate your answer. |
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Answer» Describe how you would determine the focal length of a converging lens, using a plane mirror and one pin. Draw a ray diagram to illustrate your answer. |
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| 8. |
The refractive index of glass with respect to air is 1.5. What is the value of the refractive index of air with respect to glass? |
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Answer» The refractive index of glass with respect to air is 1.5. What is the value of the refractive index of air with respect to glass? |
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| 9. |
The name and radius of curvature of a spherical mirror whose focal length is +2 cm is |
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Answer» The name and radius of curvature of a spherical mirror whose focal length is +2 cm is |
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| 10. |
Why is the actual position of a star different from the apparent position? |
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Answer» Why is the actual position of a star different from the apparent position? |
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| 11. |
The north-south polarities of an electromagnet can be found easily by using : (a) Fleming's right-hand rule (b) Fleming's left-hand rule (c) Clock face rule (d) Left-hand thumb rule |
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Answer» The north-south polarities of an electromagnet can be found easily by using : (a) Fleming's right-hand rule (b) Fleming's left-hand rule (c) Clock face rule (d) Left-hand thumb rule |
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| 12. |
A boy uses spectacles of focal length -50 cm. Name the defect of vision he has. |
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Answer» A boy uses spectacles of focal length -50 cm. Name the defect of vision he has. |
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| 13. |
Choose the correct option. i) Aqueous humour ii) vitreous humour iii) cornea iv) iris v) pupil |
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Answer» Choose the correct option.
i) Aqueous humour ii) vitreous humour iii) cornea iv) iris v) pupil |
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| 14. |
The direction of induced current is obtained by |
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Answer» The direction of induced current is obtained by |
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| 15. |
The day is longer on the earth by about 4 minutes because : (a) the earth is round in shape (b) the earth rotates on its axis (c) the earth revolves around the sun (d) the earth has atmosphere |
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Answer» The day is longer on the earth by about 4 minutes because : |
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| 16. |
Determine the point of application of net force, when forces of 20 N & 30 N are acting on the rod as shown in the figure. |
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Answer» Determine the point of application of net force, when forces of 20 N & 30 N are acting on the rod as shown in the figure.
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| 17. |
The following graph shows the temperature variation of pure mercury with the amount of heat energy supplied. Calculate the specific latent heat of melting (or fusion) of mercury in cal g−1, if 85 g of mercury is heated. |
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Answer» The following graph shows the temperature variation of pure mercury with the amount of heat energy supplied. Calculate the specific latent heat of melting (or fusion) of mercury in cal g−1, if 85 g of mercury is heated.
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| 18. |
Question 35 Suggest a few useful ways of utilizing waste water. |
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Answer» Question 35 |
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| 19. |
While solving a sum if f=-- ve value then we consider focal length as positive am i right???? |
| Answer» While solving a sum if f=-- ve value then we consider focal length as positive am i right???? | |
| 20. |
Write the major uses of Carbon and its compounds |
| Answer» Write the major uses of Carbon and its compounds | |
| 21. |
Why doesn't a glass slab show dispersion of light whereas a prism shows? Has it got something to do with the prism's shape?? |
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Answer» Why doesn't a glass slab show dispersion of light whereas a prism shows? Has it got something to do with the prism's shape?? |
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| 22. |
can refractive index of two elements be same ??? please justify |
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Answer» can refractive index of two elements be same ??? please justify |
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| 23. |
It requires 4 J of work to move a charge of 20 C from point A to point B, separated by a distance of 0.2 cm. The potential difference between A and B in volts |
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Answer» It requires 4 J of work to move a charge of 20 C from point A to point B, separated by a distance of 0.2 cm. The potential difference between A and B in volts |
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| 24. |
Sudha finds out that the sharp image of the widow pane of her science laboratory is formed at a distance of 15 cm from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. In which direction will she move the screen to obtain a sharp image of the building? What is the approximate focal length of this lens? |
| Answer» Sudha finds out that the sharp image of the widow pane of her science laboratory is formed at a distance of 15 cm from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. In which direction will she move the screen to obtain a sharp image of the building? What is the approximate focal length of this lens? | |
| 25. |
A good fuel is one which possesses: (a) high calorific value and low ignition temperature (b) high calorific value and high ignition temperature (c) high calorific value and moderate ignition temperature (d) low calorific value and moderate ignition tempeature |
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Answer» A good fuel is one which possesses: |
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| 26. |
Acceleration due to gravity on a planet is 12 times the value on the earth. Escape velocity for the planet and the earth are Vp and Ve respectively. The ratio of the radii of the planet and the earth is 1:2, then |
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Answer» Acceleration due to gravity on a planet is 12 times the value on the earth. Escape velocity for the planet and the earth are Vp and Ve respectively. The ratio of the radii of the planet and the earth is 1:2, then |
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| 27. |
What are the two most common defects of vision (or defects of eye) ? How are they corrected ? |
| Answer» What are the two most common defects of vision (or defects of eye) ? How are they corrected ? | |
| 28. |
Ultrasonic waves are used to get the image of various parts of the heart. This technique is used in ___. |
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Answer» Ultrasonic waves are used to get the image of various parts of the heart. This technique is used in ___. |
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| 29. |
An electron beam enters a magnetic field at right angles to it as shown in the figure. The direction of force acting on the electron beam will be : (a) to the left (b) to the right (c) into the page (d) out of the page |
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Answer» An electron beam enters a magnetic field at right angles to it as shown in the figure.
The direction of force acting on the electron beam will be : (a) to the left (b) to the right (c) into the page (d) out of the page |
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| 30. |
An electric bulb is rated 220V, 100 W (a) What is its resistance ? (b) What safe current can be passed through it? |
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Answer» An electric bulb is rated 220V, 100 W (a) What is its resistance ? (b) What safe current can be passed through it? |
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| 31. |
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform? |
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Answer» A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform? |
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| 32. |
Find the deviation obtained by a monochromatic red light incident on an equilateral triangle prism at an angle of 60 degree. Given that refractive index of the glass prism is√3. |
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Answer» Find the deviation obtained by a monochromatic red light incident on an equilateral triangle prism at an angle of 60 degree. Given that refractive index of the glass prism is√3. |
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| 33. |
.Calculate the power loss in an electrical transmission cable, 15 km long, carrying a current of 100A at a potential of 200 kV. The resistance per km of the cable is 0.2 Ω. |
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Answer» .Calculate the power loss in an electrical transmission cable, 15 km long, carrying a current of 100A at a potential of 200 kV. The resistance per km of the cable is 0.2 Ω. |
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| 34. |
The direction of current is opposite to the direction of flow of electrons. So does this mean current is a vector quantity? Why or why not? |
| Answer» The direction of current is opposite to the direction of flow of electrons. So does this mean current is a vector quantity? Why or why not? | |
| 35. |
How many 176(ohm) resistors in are required to carry 5 A on 220v line a)in parallel b)in series |
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Answer» How many 176(ohm) resistors in are required to carry 5 A on 220v line a)in parallel b)in series |
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| 36. |
Assertion(A): The process of deplating is done in-order to recover gold and other valuable metals from the circuits of computers and mobiles. Reason(R): Deplating is similar to the process of electroplating. |
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Answer» Assertion(A): The process of deplating is done in-order to recover gold and other valuable metals from the circuits of computers and mobiles. |
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| 37. |
The real image formed by a concave mirror is larger than the object when the object is : (a) at a distance equal to radius of curvature (b) at a distance less than the focal length (c) between focus and centre of curvature (d) at a distance greater than radius of curvature |
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Answer» The real image formed by a concave mirror is larger than the object when the object is : (a) at a distance equal to radius of curvature (b) at a distance less than the focal length (c) between focus and centre of curvature (d) at a distance greater than radius of curvature |
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| 38. |
Which physical quantity does the unit diopter represent? |
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Answer» Which physical quantity does the unit diopter represent? |
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| 39. |
Which of the following circuits will still be dangerous even if the fuse blows off and electric iron stops working during a short circuit ? |
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Answer» Which of the following circuits will still be dangerous even if the fuse blows off and electric iron stops working during a short circuit ?
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| 40. |
Explain nuclear fission in brief. |
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Answer» Explain nuclear fission in brief. |
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| 41. |
In an electromagnetic radiation, the electric and magnetic fields are at an angle of _____ to the direction of wave propagation. |
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Answer» In an electromagnetic radiation, the electric and magnetic fields are at an angle of _____ to the direction of wave propagation. |
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| 42. |
A ball of mass 10 g is dropped from a certain height. At 50m height its KE is equal to its PE. From what height was it dropped? Calculate its PE at the topmost point, TE midway. |
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Answer» A ball of mass 10 g is dropped from a certain height. At 50m height its KE is equal to its PE. From what height was it dropped? Calculate its PE at the topmost point, TE midway. |
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| 43. |
Define principal axis of a spherical mirror. |
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Answer» Define principal axis of a spherical mirror. |
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| 44. |
Identify correct relation for the circuit mentioned below, assuming the current I3 flows through a conductor with zero resistance: |
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Answer» Identify correct relation for the circuit mentioned below, assuming the current I3 flows through a conductor with zero resistance: |
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| 45. |
Was franklin correct when he proposed that electricity was caused by an electric fluid(5 marks) |
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Answer» Was franklin correct when he proposed that electricity was caused by an electric fluid(5 marks) |
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| 46. |
What is the difference between centripetal force and centrifugal force ? |
| Answer» What is the difference between centripetal force and centrifugal force ? | |
| 47. |
Identify the solenoid in the following figure: |
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Answer» Identify the solenoid in the following figure: |
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| 48. |
Which one of the following has the highest calorific value? |
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Answer» Which one of the following has the highest calorific value? |
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| 49. |
Dear sir/Ma'am, Does the laws of reflection hold good in rough and irregular surfaces |
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Answer» Dear sir/Ma'am, Does the laws of reflection hold good in rough and irregular surfaces |
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| 50. |
The working of optical instruments like camera, microscope, telescope, etc. having glass lenses is based on a phenomenon of light. Identify the phenomenon |
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Answer» The working of optical instruments like camera, microscope, telescope, etc. having glass lenses is based on a phenomenon of light. Identify the phenomenon |
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