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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 conductor is carrying a current, and a magnet is placed next to it as shown. Now it is known that the magnet moves away from you perpendicular to the plane. What should be the current in another wire (shown in green) in order to keep the magnet in place? (Consider the force only on the north pole) |
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Answer» A conductor is carrying a current, and a magnet is placed next to it as shown. Now it is known that the magnet moves away from you perpendicular to the plane. What should be the current in another wire (shown in green) in order to keep the magnet in place? (Consider the force only on the north pole) |
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| 2. |
Question 8 The value of quantity G in the law of gravitation (a) depends on mass of earth only (b) depends on radius of earth only (c) depends on both mass and radius of earth (d) is independent of mass and radius of the earth |
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Answer» Question 8 The value of quantity G in the law of gravitation (a) depends on mass of earth only (b) depends on radius of earth only (c) depends on both mass and radius of earth (d) is independent of mass and radius of the earth |
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| 3. |
The corrective lens used for a far-sightedness person is _________ in the middle. |
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Answer» The corrective lens used for a far-sightedness person is _________ in the middle. |
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| 4. |
How much current will an electric geyser draw from a 220 V source, if the resistance of the geyser is 110 ohm? |
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Answer» How much current will an electric geyser draw from a 220 V source, if the resistance of the geyser is 110 ohm? |
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| 5. |
What is hydroelectric power? |
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Answer» What is hydroelectric power? |
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| 6. |
The blue color of the sky is due to ___ |
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Answer» The blue color of the sky is due to |
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| 7. |
The Earth is acted upon by the gravitation of the Sun though it does not fall into the Sun. Why? |
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Answer» The Earth is acted upon by the gravitation of the Sun though it does not fall into the Sun. Why? |
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| 8. |
Three particles, each of mass m, are placed at the vertices of an equilateral triangle of side a. The gravitational field intensity at the centroid of the triangle is |
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Answer» Three particles, each of mass m, are placed at the vertices of an equilateral triangle of side a. The gravitational field intensity at the centroid of the triangle is |
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| 9. |
From the given figure, calculate the power consumed by B1, B2 and also reading in the (V). |
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Answer» From the given figure, calculate the power consumed by B1, B2 and also reading in the (V).
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| 10. |
Question 3 Find out, from the table, the medium having highest optical density. Also, find the medium with lowest optical density. Material mediumRefractive indexMaterial mediumRefractive indexAir1.0003Canada Balsam1.53Ice1.31−−Water1.33Rock salt1.54Alcohol1.36−−Kerosene1.44Carbon disulphide1.63Fused quartz1.46Dense flint glass1.65Turpentine oil1.47Ruby1.71Benzene1.50Sapphire1.77Crown glass1.52Diamond2.42 |
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Answer» Question 3 |
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| 11. |
A convergent beam of light passes through a diverging lens of focal length 0.2 m and comes to focus 0.3 m behind the lens. Find the position of the point at which the beam would converge in the absence of lens. |
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Answer» A convergent beam of light passes through a diverging lens of focal length 0.2 m and comes to focus 0.3 m behind the lens. Find the position of the point at which the beam would converge in the absence of lens. |
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| 12. |
The axis of earth's magnetic field is inclined with the geographical axis at an angle of about : (a) 5o (b) 15o (c) 25o (d) 35o |
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Answer» The axis of earth's magnetic field is inclined with the geographical axis at an angle of about : (a) 5o (b) 15o (c) 25o (d) 35o |
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| 13. |
Explain different ways to induce current in a coil. [3 MARKS] |
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Answer» Explain different ways to induce current in a coil. [3 MARKS] |
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| 14. |
A wire of resistance R1 is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant of this combination be R2 then the ratio R1R2 is: (a) 125 (b) 15 (c) 5 (d) 25 |
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Answer» A wire of resistance R1 is cut into five equal pieces. These five pieces of wire are then connected in parallel. |
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| 15. |
Two resistors of resistances 4 Ω each are connected in series. Find the equivalent resistance of the circuit. |
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Answer» Two resistors of resistances 4 Ω each are connected in series. Find the equivalent resistance of the circuit. |
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| 16. |
Having two eyes gives a person : (a) deeper field of view (b) coloured field of view (c) rear field to view (d) wider field of view |
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Answer» Having two eyes gives a person : (a) deeper field of view (b) coloured field of view (c) rear field to view (d) wider field of view |
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| 17. |
A real and enlarged image can be obtained by using a : (a) convex mirror (b) plane mirror (c) concave mirror (d) either convex or plane mirror. |
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Answer» A real and enlarged image can be obtained by using a : (a) convex mirror (b) plane mirror (c) concave mirror (d) either convex or plane mirror. |
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| 18. |
kWh is the unit of (a) power (b) force (c) energy (d) none of these |
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Answer» kWh is the unit of (a) power (b) force (c) energy (d) none of these |
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| 19. |
Traditional use of wind energy can be modified for our convenience through ___. |
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Answer» Traditional use of wind energy can be modified for our convenience through |
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| 20. |
A converging lens forms the image of an object placed in front of it, beyond 2F2 of the lens. (a) Where is the object placed? (b) Draw a ray diagram to show the formation of the image. (c) State three characteristics of the image. |
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Answer» A converging lens forms the image of an object placed in front of it, beyond 2F2 of the lens. (a) Where is the object placed? (b) Draw a ray diagram to show the formation of the image. (c) State three characteristics of the image. |
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| 21. |
A slab of stone of area 0.34 m2 and thickness 10 cm is exposed on the lower face to steam at 100∘ C. A block of ice at 0∘ C rests on the upper face of the slab. In one hour, 3.6 kg of ice is melted. Assume that the heat loss from the sides is negligible. The latent heat of fusion of ice is 3.4×105 J kg−1. What is the thermal conductivity of the stone in units of Js−1m−1 ∘C−1? |
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Answer» A slab of stone of area 0.34 m2 and thickness 10 cm is exposed on the lower face to steam at 100∘ C. A block of ice at 0∘ C rests on the upper face of the slab. In one hour, 3.6 kg of ice is melted. Assume that the heat loss from the sides is negligible. The latent heat of fusion of ice is 3.4×105 J kg−1. What is the thermal conductivity of the stone in units of Js−1m−1 ∘C−1? |
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| 22. |
What should the Gear Ratio be for a Gear System being used for gain in torque? |
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Answer» What should the Gear Ratio be for a Gear System being used for gain in torque? |
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| 23. |
Question 4 (c) An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms: muscular, contact, non-contact, gravity, friction, shape, attraction (c) The type of force responsible for a change in the state of motion of the arrow is an example of a ___ force. |
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Answer» Question 4 (c) An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms: muscular, contact, non-contact, gravity, friction, shape, attraction (c) The type of force responsible for a change in the state of motion of the arrow is an example of a |
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| 24. |
What are the possible harmful effects of fossil fuels? |
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Answer» What are the possible harmful effects of fossil fuels? |
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| 25. |
Which part of the human eye is responsible of rendering different eye colour for different human beings? |
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Answer» Which part of the human eye is responsible of rendering different eye colour for different human beings? |
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| 26. |
A bullet was fired from a gun. Choose the correct option for the situation assuming that no external force is acting on the gun-bullet system. |
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Answer» A bullet was fired from a gun. Choose the correct option for the situation assuming that no external force is acting on the gun-bullet system. |
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| 27. |
Descirbe how you will locate a current-carrying wire concealed in a wall. |
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Answer» Descirbe how you will locate a current-carrying wire concealed in a wall. |
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| 28. |
Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.) (a) mass (b) speed (c) velocity (d) momentum |
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Answer» Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.) (a) mass (b) speed (c) velocity (d) momentum |
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| 29. |
Name the moderator used in a nuclear reactor. |
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Answer» Name the moderator used in a nuclear reactor. |
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| 30. |
Find the time taken by light to cover a distance of 9 mm in water. Take μwater = 43 |
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Answer» Find the time taken by light to cover a distance of 9 mm in water. Take μwater = 43 |
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| 31. |
The crystalline lens of human eye is of what shape? |
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Answer» The crystalline lens of human eye is of what shape? |
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| 32. |
(a) Name that part of a box-type solar cooker which allows the sun's heat rays to enter the box but does not allow inside heat to go out. (b) Explain why, a plane mirror reflector is used in a box-type solar cooker. |
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Answer» (a) Name that part of a box-type solar cooker which allows the sun's heat rays to enter the box but does not allow inside heat to go out. (b) Explain why, a plane mirror reflector is used in a box-type solar cooker. |
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| 33. |
Substances has a fixed amount of potential energy, which is referred to _______ . |
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Answer» Substances has a fixed amount of potential energy, which is referred to _______ . |
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| 34. |
Which of the following is needed for the formation of biogas from cow-dung and which not ? Water, Oxygen |
| Answer» Which of the following is needed for the formation of biogas from cow-dung and which not ? Water, Oxygen | |
| 35. |
A calorimeter of water equivalent 15 g contains 165 g of water at 25∘C. Steam at 100∘C is passed through the water for some time. The temperature is increased to 30∘C and the mass of the calorimeter and its contents is increased by 1.5 g. Calculate the specific latent heat of vaporization of water. The heat capacity of water is 1 cal g−1 ∘C−1 |
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Answer» A calorimeter of water equivalent 15 g contains 165 g of water at 25∘C. Steam at 100∘C is passed through the water for some time. The temperature is increased to 30∘C and the mass of the calorimeter and its contents is increased by 1.5 g. Calculate the specific latent heat of vaporization of water. The heat capacity of water is 1 cal g−1 ∘C−1 |
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| 36. |
OA is an object with object size 4 cm and O'A' is the image of the object. Find the height of the image formed. |
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Answer» OA is an object with object size 4 cm and O'A' is the image of the object. Find the height of the image formed. |
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| 37. |
Which among the following is the condition for electromagnetic induction to take place? |
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Answer» Which among the following is the condition for electromagnetic induction to take place? |
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| 38. |
Which of the following devices convert electrical energy into mechanical energy? |
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Answer» Which of the following devices convert electrical energy into mechanical energy? |
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| 39. |
The force F experienced by a charge q in an electric field E is |
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Answer» The force F experienced by a charge q in an electric field E is |
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| 40. |
Name two safety measures commonly used in electric circuits and appliances. Explain one of the measures in brief. [3 MARKS] |
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Answer» Name two safety measures commonly used in electric circuits and appliances. Explain one of the measures in brief. [3 MARKS] |
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| 41. |
A wheel completes 2000 rotations in covering a distance of 9.5 km. The diameter of the wheel is |
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Answer» A wheel completes 2000 rotations in covering a distance of 9.5 km. The diameter of the wheel is |
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| 42. |
The function of commutator or slip ring is to |
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Answer» The function of commutator or slip ring is to |
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| 43. |
By connecting an extra appliance in parallel to the initial appliance for the constant input power, we___. |
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Answer» By connecting an extra appliance in parallel to the initial appliance for the constant input power, we |
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| 44. |
We understand 'temperature' as a measure of the 'hotness' or 'coldness' of a body. Which of these properties do you think explicitly depends upon the temperature? |
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Answer» We understand 'temperature' as a measure of the 'hotness' or 'coldness' of a body. Which of these properties do you think explicitly depends upon the temperature? |
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| 45. |
Consider the following statements and choose the correct option. 1. Magnetic field lines form closed loops. 2. No two field lines intersect |
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Answer» Consider the following statements and choose the correct option. |
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| 46. |
Two different wires have specific resistivities, lengths and areas of cross-section in the ratio 3:4, 2:9 and 8:27 respectively. Find the ratio of resistances of the two wires. |
| Answer» Two different wires have specific resistivities, lengths and areas of cross-section in the ratio 3:4, 2:9 and 8:27 respectively. Find the ratio of resistances of the two wires. | |
| 47. |
A gas initially 20 kPa, 1.5 L and 260 K expands at constant temperature until the pressure drops to 12 kPa. The gas is then held at the constant pressure of 12 kPa and heated until the temperature rises to 320 K. Calculate the final volume of the gas in litres.3.077 |
Answer» A gas initially 20 kPa, 1.5 L and 260 K expands at constant temperature until the pressure drops to 12 kPa. The gas is then held at the constant pressure of 12 kPa and heated until the temperature rises to 320 K. Calculate the final volume of the gas in litres.
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| 48. |
How can you avoid overloading? |
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Answer» How can you avoid overloading? |
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| 49. |
Where do you use convex mirrors? |
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Answer» Where do you use convex mirrors? |
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| 50. |
How does generator change mechanical energy into electrical energy? |
| Answer» How does generator change mechanical energy into electrical energy? | |
