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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. |
What is the colour of the sunlight : (a) scattered by the dust particles in the atmosphere ? (b) scattered by the air molecules in the atmosphere ? |
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Answer» What is the colour of the sunlight : (a) scattered by the dust particles in the atmosphere ? (b) scattered by the air molecules in the atmosphere ? |
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| 2. |
How is the mechanical advantage (MA) related to the velocity ratio (VR) for an ideal machine? |
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Answer» How is the mechanical advantage (MA) related to the velocity ratio (VR) for an ideal machine? |
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| 3. |
If the mass of a ball is 5 kg on Earth, then what would be its mass on Jupiter? |
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Answer» If the mass of a ball is 5 kg on Earth, then what would be its mass on Jupiter? |
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| 4. |
Which light has the longer wavelength : red light or blue light ? |
| Answer» Which light has the longer wavelength : red light or blue light ? | |
| 5. |
is it possible to in crease magnification of mirrors as in lenses ? i mean can two types of mirrors be combined to increase magnification? |
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Answer» is it possible to in crease magnification of mirrors as in lenses ? i mean can two types of mirrors be combined to increase magnification? |
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| 6. |
A circuit consists of a resistor of 1 ohm in series with a parallel arrangement of resistors of 6 ohms and 3 ohms. Calculate the total resistance of the circuit. Draw a diagram of the arrangement. |
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Answer» A circuit consists of a resistor of 1 ohm in series with a parallel arrangement of resistors of 6 ohms and 3 ohms. Calculate the total resistance of the circuit. Draw a diagram of the arrangement. |
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| 7. |
A hot solid of mass 60 g at 100∘C is placed in 150 g of water at 20∘C. The final temperature recorded is 25∘C. Calculate the specific heat of solid. (Specific heat of water = 4200J/kg/∘C) |
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Answer» A hot solid of mass 60 g at 100∘C is placed in 150 g of water at 20∘C. The final temperature recorded is 25∘C. Calculate the specific heat of solid. (Specific heat of water = 4200J/kg/∘C) |
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| 8. |
Acceleration due to gravity 'g' in terms of mean density of the Earth, 'd ' (where R is radius of the Earth and G is universal gravitational constant) is |
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Answer» Acceleration due to gravity 'g' in terms of mean density of the Earth, 'd ' (where R is radius of the Earth and G is universal gravitational constant) is |
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| 9. |
A steel wire of mass 4.0 g and length 80 cm is fixed at the two ends. The tension in the wire is 50N. The frequency of the fourth harmonic of the fundamental is |
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Answer» A steel wire of mass 4.0 g and length 80 cm is fixed at the two ends. The tension in the wire is 50N. The frequency of the fourth harmonic of the fundamental is |
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| 10. |
At very high altitude, the sky appears dark. Why? |
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Answer» At very high altitude, the sky appears dark. Why? |
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| 11. |
What is the unit of electric current? |
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Answer» What is the unit of electric current? |
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| 12. |
Why can't a glass slab disperse light? |
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Answer» Why can't a glass slab disperse light? |
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| 13. |
What is the formula of magnification and when to use the formula of magnification and formula of mirror |
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Answer» What is the formula of magnification and when to use the formula of magnification and formula of mirror |
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| 14. |
Which mirror or lens can form a virtual, erect and highly diminished image of object? |
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Answer» Which mirror or lens can form a virtual, erect and highly diminished image of object? |
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| 15. |
An electron enters a magnetic field at right angles to it, as shown in figure. The direction of force acting on the electron will |
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Answer» An electron enters a magnetic field at right angles to it, as shown in figure. The direction of force acting on the electron will
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| 16. |
Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to the electric mains supply. How much current is drawn from the line if the supply voltage is 220 V? (Keep your answer to 2 decimal places) |
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Answer» Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to the electric mains supply. How much current is drawn from the line if the supply voltage is 220 V? (Keep your answer to 2 decimal places) |
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| 17. |
The image formed by lens of camera is |
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Answer» The image formed by lens of camera is |
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| 18. |
What is a spectrum? |
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Answer» What is a spectrum? |
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| 19. |
Which type of mirror is used in a solar furnace ? Support your answer with reason. |
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Answer» Which type of mirror is used in a solar furnace ? Support your answer with reason. |
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| 20. |
The current through a 10 V tungsten filament lamp connected to a 10 V source of negligible resistance is 2 A. Calculate the electrical energy (in kWh) consumed in 5 hours. |
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Answer» The current through a 10 V tungsten filament lamp connected to a 10 V source of negligible resistance is 2 A. Calculate the electrical energy (in kWh) consumed in 5 hours. |
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| 21. |
Question 4 A student has difficulty in reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected? |
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Answer» Question 4 A student has difficulty in reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected? |
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| 22. |
Why do concave mirror converge parallel beams of light, and convex mirror do not ? |
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Answer» Why do concave mirror converge parallel beams of light, and convex mirror do not ? |
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| 23. |
Which of the following statement is correct? |
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Answer» Which of the following statement is correct? |
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| 24. |
Show that 1 kWh = 3.6×1. |
| Answer» Show that 1 kWh = 3.6×1. | |
| 25. |
What is meant by the statement 'the critical angle for diamond is 24∘? |
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Answer» What is meant by the statement 'the critical angle for diamond is 24∘? |
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| 26. |
What are an electromagnetic and a volt? |
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Answer» What are an electromagnetic and a volt? |
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| 27. |
What does these lines mean- the fact that a small source of light casts a sharp shadow of an opaque object points to this straight line path of light, usually indicated as a ray of light. |
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Answer» What does these lines mean- the fact that a small source of light casts a sharp shadow of an opaque object points to this straight line path of light, usually indicated as a ray of light. |
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| 28. |
What is usual current rating of fuse wire in line to feed 1.Light and fans? 2.Appliances of 2KW or more power. |
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Answer» What is usual current rating of fuse wire in line to feed 1.Light and fans? 2.Appliances of 2KW or more power. |
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| 29. |
Forces acting on a stationery charge in the magnetic field B is |
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Answer» Forces acting on a stationery charge in the magnetic field B is |
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| 30. |
In order to obtain a magnification of, - 0.75 with a convex lens of focal length 8 cm, the object should be placed : (a) at less than 8 cm (b) between 8 cm and 16 cm (c) beyond 16 cm (d) at 16 cm |
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Answer» In order to obtain a magnification of, - 0.75 with a convex lens of focal length 8 cm, the object should be placed : (a) at less than 8 cm (b) between 8 cm and 16 cm (c) beyond 16 cm (d) at 16 cm |
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| 31. |
The strength of the magnetic field between the poles of an electromagnet would be unchanged if : (a) current in the electromagnet winding were doubled (b) direction of current in electromagnet winding were reversed (c) distance between the poles of electromagnet were doubled (d) material of the core of electromagnet were changed |
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Answer» The strength of the magnetic field between the poles of an electromagnet would be unchanged if : (a) current in the electromagnet winding were doubled (b) direction of current in electromagnet winding were reversed (c) distance between the poles of electromagnet were doubled (d) material of the core of electromagnet were changed |
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| 32. |
(i) State and define the household unit of electricity. (ii) What is the voltage of the electricity that is generally supplied to a house? (iii) What is consumed while using different electrical appliances, for which electricity bills are paid? |
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Answer» (i) State and define the household unit of electricity. |
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| 33. |
A power circuit uses a cable having three different wires. (a) Name the three wires of the cable. (b) Between which of the two wires should the heating element of an electric geyser be connected? (c) To which wire should the metallic case of the geyser be connected? (d) To which wire should the switch and fuse be connected? |
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Answer» A power circuit uses a cable having three different wires. (a) Name the three wires of the cable. (b) Between which of the two wires should the heating element of an electric geyser be connected? (c) To which wire should the metallic case of the geyser be connected? (d) To which wire should the switch and fuse be connected? |
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| 34. |
One coulomb charge per second equals to ___ Ampere. |
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Answer» One coulomb charge per second equals to |
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| 35. |
Which of the following can result in the increase in the strength of a solenoid? |
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Answer» Which of the following can result in the increase in the strength of a solenoid? |
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| 36. |
(a) Explain how tidal energy can be used to generate electricity. (b) Why is tidal energy not likely to be a potential source of energy ? |
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Answer» (a) Explain how tidal energy can be used to generate electricity. |
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| 37. |
An object is immersed in a fluid. In order that the object becomes invisible, it should |
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Answer» An object is immersed in a fluid. In order that the object becomes invisible, it should |
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| 38. |
(a) What is electromagnetic induction (b) Describe one experiment to demonstrate the phenomenon of electromagnetic induction. |
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Answer» (a) What is electromagnetic induction |
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| 39. |
What is the conventional direction of electric current? How does it differ from the direction of flow of electrons? What is the unit of charge? [3 MARKS] |
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Answer» What is the conventional direction of electric current? How does it differ from the direction of flow of electrons? What is the unit of charge? [3 MARKS] |
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| 40. |
A body is thrown up with an initial velocity of 10 m s−1. It reaches a maximum height, h. Find the value of h. [Take acceleration due to gravity, g=10 m s−2] |
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Answer» A body is thrown up with an initial velocity of 10 m s−1. It reaches a maximum height, h. Find the value of h. [Take acceleration due to gravity, g=10 m s−2] |
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| 41. |
Five resistors, each of 3Ω are connected as shown in the figure. Calculate the resistance (a) between the points P and Q, and (b) between the points X and Y. |
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Answer» Five resistors, each of 3Ω are connected as shown in the figure. Calculate the resistance (a) between the points P and Q, and (b) between the points X and Y. |
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| 42. |
What is the specific latent heat of fusion of water in SI and CGS units |
| Answer» What is the specific latent heat of fusion of water in SI and CGS units | |
| 43. |
When light rays are incident on a prism at an angle of 45∘, the minimum deviation is obtained. If the refractive index of the material of prism is √2 then the angle of the prism will be |
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Answer» When light rays are incident on a prism at an angle of 45∘, the minimum deviation is obtained. If the refractive index of the material of prism is √2 then the angle of the prism will be |
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| 44. |
Why does a freely suspended magnet needle points in geographic north-south direction? |
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Answer» Why does a freely suspended magnet needle points in geographic north-south direction? |
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| 45. |
It is stated that an electric current involves the flow of electrons in most cases. Is there any other thing that constitutes the electric current? |
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Answer» It is stated that an electric current involves the flow of electrons in most cases. Is there any other thing that constitutes the electric current? |
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| 46. |
An electric bulb of 40 W glows for 10 hours a day. What is the amount to be paid in the month of 30 days if 1 unit of electricity cost Rs. 2.50? |
| Answer» An electric bulb of 40 W glows for 10 hours a day. What is the amount to be paid in the month of 30 days if 1 unit of electricity cost Rs. 2.50? | |
| 47. |
A battery of 9V is connected in series with resistor of 0.2,0.3,0.4,0.5,12 Ohm. How much current would flow through the12 Ohm resistor? |
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Answer» A battery of 9V is connected in series with resistor of 0.2,0.3,0.4,0.5,12 Ohm. How much current would flow through the12 Ohm resistor? |
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| 48. |
A object is placed 90 cm away from concave mirror of focal length 30cm .find position and Nature of image |
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Answer» A object is placed 90 cm away from concave mirror of focal length 30cm .find position and Nature of image |
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| 49. |
What is the role of resistor in electric circuit ? |
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Answer» What is the role of resistor in electric circuit ? |
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| 50. |
How can I solve a triangular connection of resistance? |
| Answer» How can I solve a triangular connection of resistance? | |
