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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. |
Two conducting wires of the same material and of equal length and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be- (a) 1:2 (b) 2:1 (c) 1:4 (d) 4:1 |
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Answer» Two conducting wires of the same material and of equal length and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be- (a) 1:2 (b) 2:1 (c) 1:4 (d) 4:1 |
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| 2. |
PQ (Double arrow ray) and PR (Single arrow ray) are two light rays emerging from the object P as shown in the figure below: What is the special name given to the angle of incidence (angle PQN) of ray PQ? |
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Answer» PQ (Double arrow ray) and PR (Single arrow ray) are two light rays emerging from the object P as shown in the figure below:
What is the special name given to the angle of incidence (angle PQN) of ray PQ? |
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| 3. |
Select the correct lens formula where u, v, f have standard meanings. |
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Answer» Select the correct lens formula where u, v, f have standard meanings. |
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| 4. |
35.What will the de barglie waveleanght if a electron move with 10% valocity of valocity of light? |
| Answer» 35.What will the de barglie waveleanght if a electron move with 10% valocity of valocity of light? | |
| 5. |
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.(a) Complete the path of the ray till it emerges out of the slab.(b) In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r ?(c) Mark angle of emergence by the letter e. How are the angles i and e related ?(d) Which two rays are parallel to each other ?(e) Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement. |
Answer» In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab. (a) Complete the path of the ray till it emerges out of the slab. (b) In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r ? (c) Mark angle of emergence by the letter e. How are the angles i and e related ? (d) Which two rays are parallel to each other ? (e) Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement. |
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| 6. |
For the circuit shown in the diagram below: What is the value of: (i) current through 6Ω resistor? (ii) potential difference across 12Ω resistor? |
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Answer» For the circuit shown in the diagram below:
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| 7. |
43. When lead storage battery is recharging the density of H_2SO_4 solution decreases why? |
| Answer» 43. When lead storage battery is recharging the density of H_2SO_4 solution decreases why? | |
| 8. |
Why are mirrors used in search light are parabolic not concave. |
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Answer» Why are mirrors used in search light are parabolic not concave. |
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| 9. |
A ray of light is incident at 60∘, on a glass-air interface. Then the light ray will be ___ Use : [μw = √2 , μa = 1] |
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Answer» A ray of light is incident at 60∘, on a glass-air interface. Then the light ray will be Use : [μw = √2 , μa = 1]
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| 10. |
34. A Ray of light is incident at an angle of incidence I, on the face of a Prism of angle A ( assume to be a small) and emerges normally from the opposite face if refractive index of Prism is ñ , the angle of incidence I is nearly equal to |
| Answer» 34. A Ray of light is incident at an angle of incidence I, on the face of a Prism of angle A ( assume to be a small) and emerges normally from the opposite face if refractive index of Prism is ñ , the angle of incidence I is nearly equal to | |
| 11. |
If a object cannot be compressed easily, then why the speed of sound is higher in that object with explanation |
| Answer» If a object cannot be compressed easily, then why the speed of sound is higher in that object with explanation | |
| 12. |
Why are the charges quantinized? |
| Answer» Why are the charges quantinized? | |
| 13. |
An electron makes a transition from orbit n=4 to the orbit n=2, of a hydrogen atom. The wavenumber of emitted radiation will be,(Consider R= Rydberg's constant ) |
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Answer» An electron makes a transition from orbit n=4 to the orbit n=2, of a hydrogen atom. The wavenumber of emitted radiation will be, |
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| 14. |
Resistance of rod is 1 2. It is bent in the form of square.What is the resistance across adjoint corners |
| Answer» Resistance of rod is 1 2. It is bent in the form of square.What is the resistance across adjoint corners | |
| 15. |
A reversible engine absorbs 600 J of heat fromSource at 627^° C and rejects some heat to the sinkat 27^° C. The heat rejected to the sink is(1) 500 J(2) 400 J(3) 300 JHS P(4) 200 J |
| Answer» A reversible engine absorbs 600 J of heat fromSource at 627^° C and rejects some heat to the sinkat 27^° C. The heat rejected to the sink is(1) 500 J(2) 400 J(3) 300 JHS P(4) 200 J | |
| 16. |
What is minimum deviation conditions for any wavelength |
| Answer» What is minimum deviation conditions for any wavelength | |
| 17. |
A transparent solid cylindrical rod has refractive index of 2√3. It is surrounded by air. A light ray is incident on the axis at one end of the rod as shown in figure.The incident angle θ for which the light ray grazes along the wall of the rod is |
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Answer» A transparent solid cylindrical rod has refractive index of 2√3. It is surrounded by air. A light ray is incident on the axis at one end of the rod as shown in figure. |
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| 18. |
Read the poem again,and work in pairs or groups to do the following tasks.(i) Find the words that describe the movements and actions of the tiger in the case and in the wild. Arrange them in two columns.(ii) Find the wordsthat describe the two places, and arrange them in two columns.Now try to share ideas about how the poet uses words and images to contrast the two situations. |
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Answer» Read the poem again,and work in pairs or groups to do the following tasks. (i) Find the words that describe the movements and actions of the tiger in the case and in the wild. Arrange them in two columns. (ii) Find the wordsthat describe the two places, and arrange them in two columns. Now try to share ideas about how the poet uses words and images to contrast the two situations. |
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| 19. |
Which of the following statement is incorrect regarding the refractive index? |
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Answer» Which of the following statement is incorrect regarding the refractive index? |
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| 20. |
Which of the following are changed when water boils? (i) Temperature (ii) State (iii) Colour |
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Answer» Which of the following are changed when water boils? |
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| 21. |
132.In the circuit below,A and B represents two inputs and C represents the output.The circuit represents (a)AND gate (b)NOR (c)OR (d)NAND |
| Answer» 132.In the circuit below,A and B represents two inputs and C represents the output.The circuit represents (a)AND gate (b)NOR (c)OR (d)NAND | |
| 22. |
Which part of the eye is known as the conjunctiva? |
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Answer» Which part of the eye is known as the conjunctiva? |
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| 23. |
If a freely falling body covers half of its total distance in the last second of its journey. Find the time of fall |
| Answer» If a freely falling body covers half of its total distance in the last second of its journey. Find the time of fall | |
| 24. |
What is soleiloids uses? |
| Answer» What is soleiloids uses? | |
| 25. |
is there any congruency like ss |
| Answer» is there any congruency like ss | |
| 26. |
Determine the value and units of universal Gravitational constant, G. |
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Answer» Determine the value and units of universal Gravitational constant, G. |
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| 27. |
We don't have any other way to find the direction of magnetic field other than those hand &thumb rules |
| Answer» We don't have any other way to find the direction of magnetic field other than those hand &thumb rules | |
| 28. |
a current i flows in a thin wire in the shape of a regular polygon with n sides The magnetic induction at tge centre of the polygon when n is infinity |
| Answer» a current i flows in a thin wire in the shape of a regular polygon with n sides The magnetic induction at tge centre of the polygon when n is infinity | |
| 29. |
The net force on a body is varying with time as (2t + 3)N. Find how impulse varies with time? |
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Answer» The net force on a body is varying with time as (2t + 3)N. Find how impulse varies with time? |
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| 30. |
A portion of a conducting wire, say length l, is kept for observation in a magnetic field as shown in the figure. The direction in which the conducting wire experiences a force is best described by |
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Answer» A portion of a conducting wire, say length l, is kept for observation in a magnetic field as shown in the figure. The direction in which the conducting wire experiences a force is best described by
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| 31. |
The near point of hypermetropic eye is 75 cm from the eye. What is the power of the lens required to enable him to read a book held at 25 cm from the eye? |
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Answer» The near point of hypermetropic eye is 75 cm from the eye. What is the power of the lens required to enable him to read a book held at 25 cm from the eye? |
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| 32. |
Statement 1: Myopia is corrected by the use of concave lens.Statement 2: A concave lens diverges the light coming from the object kept at infinity and makes it appear to be within the far point of myopic eye, which then acts as the object for the myopic eye thus helping to view it. |
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Answer» Statement 1: Myopia is corrected by the use of concave lens. Statement 2: A concave lens diverges the light coming from the object kept at infinity and makes it appear to be within the far point of myopic eye, which then acts as the object for the myopic eye thus helping to view it. |
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| 33. |
Which among the following is/are the way to increase the strength of the current through the given solenoid? |
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Answer» Which among the following is/are the way to increase the strength of the current through the given solenoid? |
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| 34. |
A particle of mass 2kg is moving along AB according tp y= x-4 with speed 4m/s, then magnitude of angulr momentum about 'o' is (a) 16\sqrt2 kg m^2/s (b) 32\sqrt2 kg m^2/s (c) 32 kg m^2/s (d) 16 kg m^2/s |
| Answer» A particle of mass 2kg is moving along AB according tp y= x-4 with speed 4m/s, then magnitude of angulr momentum about 'o' is (a) 16\sqrt2 kg m^2/s (b) 32\sqrt2 kg m^2/s (c) 32 kg m^2/s (d) 16 kg m^2/s | |
| 35. |
55.If the size of nucleus is scaled upon the tip of a sharp pin (0.00001 m) then what roughly is the size of the atom? |
| Answer» 55.If the size of nucleus is scaled upon the tip of a sharp pin (0.00001 m) then what roughly is the size of the atom? | |
| 36. |
How does fuse wire protects electrical appliances? |
| Answer» How does fuse wire protects electrical appliances? | |
| 37. |
A geostationary satellite is orbiting the earth at a height of 5R above that surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a height of 2R from the surface of the earth is |
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Answer» A geostationary satellite is orbiting the earth at a height of 5R above that surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a height of 2R from the surface of the earth is |
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| 38. |
Coagulation of 90ml of a negative sol requires 10ml of 0.5M NaCl.The coagulation value of NaCl is (1) 25.30 (2) 50.25 (3)55.5 (4)100 |
| Answer» Coagulation of 90ml of a negative sol requires 10ml of 0.5M NaCl.The coagulation value of NaCl is (1) 25.30 (2) 50.25 (3)55.5 (4)100 | |
| 39. |
Why people are advised to drink oral rehydration salts (ORS) in order to prevent sun-stoke? |
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Answer» Why people are advised to drink oral rehydration salts (ORS) in order to prevent sun-stoke? |
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| 40. |
A ray of light is incident on one face of a prism (μ=1.5) at an angle of 60∘. The refracting angle of the prism is also 60∘. Find the angle of emergence & angle of deviation?(sin25∘=0.42,sin39∘=0.63) |
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Answer» A ray of light is incident on one face of a prism (μ=1.5) at an angle of 60∘. The refracting angle of the prism is also 60∘. Find the angle of emergence & angle of deviation? |
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| 41. |
Why do we use tungsten filament in bulb or lamps ? |
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Answer» Why do we use tungsten filament in bulb or lamps ? |
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| 42. |
What is the velocity ratio of a single fixed pulley? |
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Answer» What is the velocity ratio of a single fixed pulley? |
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| 43. |
The given diagram shows a ray of light incident on an equilateral glass prism placed in minimum deviation position. The path of the emergent ray is such that |
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Answer» The given diagram shows a ray of light incident on an equilateral glass prism placed in minimum deviation position. The path of the emergent ray is such that
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| 44. |
A wire of length L and resistance R is stretched so that its length its doubled. How will(i) Resistance change (ii) Resistivity change? |
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Answer» A wire of length L and resistance R is stretched so that its length its doubled. How will |
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| 45. |
In an ideal step-up transformer, the ratio of turns of primary to secondary is 1:10 and primary voltage is 230 V. If the load current is 2A, then current in the primary is |
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Answer» In an ideal step-up transformer, the ratio of turns of primary to secondary is 1:10 and primary voltage is 230 V. If the load current is 2A, then current in the primary is |
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| 46. |
In order to make an efficient solar cooker, the cover of cooker box should be made of : (a) transparent plastic sheet (b) shining aluminium sheet (c) butter paper sheet (d) transparent glass sheet |
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Answer» In order to make an efficient solar cooker, the cover of cooker box should be made of : |
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| 47. |
A student performed the experiment of glass slab and with different angles of incidence measured the angles of refraction and emergence in each case. He then recorded his observations as given in the table.The correct observation is S. No. Angle of incidence Angle of refraction Angle of emergence A B C D 30° 40° 50° 60° 25° 42° 50° 60° 30° 40° 50° 62° (1) A(2) B(3) C(4) D |
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Answer» A student performed the experiment of glass slab and with different angles of incidence measured the angles of refraction and emergence in each case. He then recorded his observations as given in the table. The correct observation is
(1) A (2) B (3) C (4) D |
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| 48. |
State the relation between force and acceleration.How much force acts on a body whose momentum remains constant. |
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Answer» State the relation between force and acceleration. How much force acts on a body whose momentum remains constant. |
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| 49. |
Among all types of light bulbs, the most energy efficient is___. |
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Answer» Among all types of light bulbs, the most energy efficient is |
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| 50. |
A piece of wire of resis†an ce 4ohm is bent through 180^° at its mid point and two halves are twisted together ,then the resis†an ce is ? |
| Answer» A piece of wire of resis†an ce 4ohm is bent through 180^° at its mid point and two halves are twisted together ,then the resis†an ce is ? | |
