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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. |
Inertia is dependent upon which of the following physical features of the object? |
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Answer» Inertia is dependent upon which of the following physical features of the object? |
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| 2. |
Each one of the following changes will increase emf (or voltage) in a simple generator except : (a) increasing the number of turns in the armature coil (b) winding the coil on a soft iron armature (c) increasing the size of the gap in which the armature turns (d) increasing the speed of rotation |
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Answer» Each one of the following changes will increase emf (or voltage) in a simple generator except : (a) increasing the number of turns in the armature coil (b) winding the coil on a soft iron armature (c) increasing the size of the gap in which the armature turns (d) increasing the speed of rotation |
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| 3. |
Name the component which is found in natural gas as well as in biogas. |
| Answer» Name the component which is found in natural gas as well as in biogas. | |
| 4. |
The defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred: (a) myopia (b) night blindness (c) cataract (d) hypermetropia |
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Answer» The defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred: (a) myopia (b) night blindness (c) cataract (d) hypermetropia |
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| 5. |
Which unit could be used to measure current? (a) watt (b) Coulomb (c) Volt (d) Ampere |
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Answer» Which unit could be used to measure current? |
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| 6. |
Why is it said that potential difference is the work done in bringing unit positive charge from 1 point to another, when positive charge is said to be intact i.e only electrons flow? |
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Answer» Why is it said that potential difference is the work done in bringing unit positive charge from 1 point to another, when positive charge is said to be intact i.e only electrons flow? |
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| 7. |
An object is kept behind a concave mirror of focal length 20cm.the image is three times the object size. Calculate two possible distances of the object from the mirror. |
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Answer» An object is kept behind a concave mirror of focal length 20cm.the image is three times the object size. Calculate two possible distances of the object from the mirror. |
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| 8. |
What is energy audit? |
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Answer» What is energy audit? |
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| 9. |
Why is a fuse wire usually encased in a cartridge of porcelain or similar material with metal ends? |
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Answer» Why is a fuse wire usually encased in a cartridge of porcelain or similar material with metal ends? |
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| 10. |
You told in topic Domestic Electric Circuit that a plug of 3 pins consists of Earth pin, Live pin and Neutral pin. But for some plugs having only 2 pins don't have Earth pin or have Earth pin? |
| Answer» You told in topic Domestic Electric Circuit that a plug of 3 pins consists of Earth pin, Live pin and Neutral pin. But for some plugs having only 2 pins don't have Earth pin or have Earth pin? | |
| 11. |
1300 J of heat energy is supplied to raise the temperature of 0.5 kg of lead from 200C to 400C. Calculate the specific heat capacity of lead. |
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Answer» 1300 J of heat energy is supplied to raise the temperature of 0.5 kg of lead from 200C to 400C. Calculate the specific heat capacity of lead. |
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| 12. |
The diagram given below represents magnetic field caused by a current-carrying conductor which is : (a) a long straight wire (b) a circular coil (c) a solenoid (d) a short straight wire |
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Answer» The diagram given below represents magnetic field caused by a current-carrying conductor which is :
(a) a long straight wire (b) a circular coil (c) a solenoid (d) a short straight wire |
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| 13. |
What is the colour of the filter that can transmit blue and red colours of light? |
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Answer» What is the colour of the filter that can transmit blue and red colours of light? |
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| 14. |
A NPN transistor conducts when- |
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Answer» A NPN transistor conducts when- |
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| 15. |
What is the scientific name of (a) short-sightedness, and (b) long-sightedness ? |
| Answer» What is the scientific name of (a) short-sightedness, and (b) long-sightedness ? | |
| 16. |
When the force applied by the moving vehicle is calculated, the actual force applied by the brakes may be slightly less than the one calculated theoretically. Why? |
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Answer» When the force applied by the moving vehicle is calculated, the actual force applied by the brakes may be slightly less than the one calculated theoretically. Why? |
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| 17. |
If the length of a wire is doubled by taking more of wire, what happens to its resistance? |
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Answer» If the length of a wire is doubled by taking more of wire, what happens to its resistance? |
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| 18. |
Consider the following statements: Which of the above statement(s) is/are correct? |
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Answer» Consider the following statements: Which of the above statement(s) is/are correct? |
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| 19. |
An elevator starts from rest with a constant upward acceleration. It moves 2 m in the first 0.6 s. A passenger in the elevator is holding a 3 kg package by a vertical string. The tension in the string during acceleration is (Take g=9.8 m/s2) |
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Answer» An elevator starts from rest with a constant upward acceleration. It moves 2 m in the first 0.6 s. A passenger in the elevator is holding a 3 kg package by a vertical string. The tension in the string during acceleration is (Take g=9.8 m/s2) |
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| 20. |
Of what substance is the core of the coil of an electric motor made? |
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Answer» Of what substance is the core of the coil of an electric motor made? |
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| 21. |
Explain the working of AC generator. |
| Answer» Explain the working of AC generator. | |
| 22. |
A body of mass 3 kg is dropped from a height of 1m. The K.E of the body before touching the ground is: |
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Answer» A body of mass 3 kg is dropped from a height of 1m. The K.E of the body before touching the ground is: |
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| 23. |
Name the commercial unit of electric energy. |
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Answer» Name the commercial unit of electric energy. |
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| 24. |
(a) What type of lens is shown in the diagram on the right ? What will happen to the parallel rays of light ? Show by completing the ray diagram. (b) Your eye contains a convex lens. Why is it unwise to look at the sun ? |
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Answer» (a) What type of lens is shown in the diagram on the right ? What will happen to the parallel rays of light ? Show by completing the ray diagram. (b) Your eye contains a convex lens. Why is it unwise to look at the sun ?
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| 25. |
A frequency of 1Hz corresponds to: |
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Answer» A frequency of 1Hz corresponds to: |
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| 26. |
A stationary source producing a sound of frequency 900 Hz. What will be the frequency of the sound heard by the listener revolving around the source with a uniform velocity of 8 m s−1? (velocity of sound is 350 m s−1) |
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Answer» A stationary source producing a sound of frequency 900 Hz. What will be the frequency of the sound heard by the listener revolving around the source with a uniform velocity of 8 m s−1? (velocity of sound is 350 m s−1) |
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| 27. |
Which structure is used for the purposes of water storage and irrigation? __ |
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Answer» Which structure is used for the purposes of water storage and irrigation? |
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| 28. |
A concave mirror has a focal length of 4 cm and an object 2 cm tall is placed 9 cm away from it. Find the nature and position of the image formed. |
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Answer» A concave mirror has a focal length of 4 cm and an object 2 cm tall is placed 9 cm away from it. Find the nature and position of the image formed. |
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| 29. |
The central portion of a lens is wrapped in black paper as shown above. An object is placed at 90 cm with the centre of curvature at 40 cm. Find the no. of images formed. |
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Answer»
The central portion of a lens is wrapped in black paper as shown above. An object is placed at 90 cm with the centre of curvature at 40 cm. Find the no. of images formed. |
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| 30. |
Two long thin charged rods with charge density λ each are placed parallel to each other at a distance d apart. The force per unit length exerted on one rod by the other will be (where k=14πϵ0) |
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Answer» Two long thin charged rods with charge density λ each are placed parallel to each other at a distance d apart. The force per unit length exerted on one rod by the other will be (where k=14πϵ0) |
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| 31. |
The diagram below shows the change of phases of a substance on a temperature-time graph on heating the substances at a constant rate. (a) What do the parts AB, BC, CD and DE represent? (b) What is the melting point of the substance? (c) What is the boiling point of the substance? |
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Answer» The diagram below shows the change of phases of a substance on a temperature-time graph on heating the substances at a constant rate.
(a) What do the parts AB, BC, CD and DE represent? (b) What is the melting point of the substance? (c) What is the boiling point of the substance? |
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| 32. |
What is meant by EMF of a cell? In what unit it is expressed? [2 MARKS] |
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Answer» What is meant by EMF of a cell? In what unit it is expressed? [2 MARKS] |
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| 33. |
If a mirror forms highly enlarged, real and inverted image, choose the position of object and mirror used to form above image. |
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Answer» If a mirror forms highly enlarged, real and inverted image, choose the position of object and mirror used to form above image. |
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| 34. |
Which factor/s affect the moment of force? |
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Answer» Which factor/s affect the moment of force? |
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| 35. |
What is the velocity of sound in air at 61 ∘C? (the velocity of sound in air at 0 ∘C=330 m s−1) |
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Answer» What is the velocity of sound in air at 61 ∘C? (the velocity of sound in air at 0 ∘C=330 m s−1) |
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| 36. |
Among the following which one is used in detecting fake notes and documents? |
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Answer» Among the following which one is used in detecting fake notes and documents? |
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| 37. |
The force of friction acting on a car on different roads in the increasing order of magnitude will be |
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Answer» The force of friction acting on a car on different roads in the increasing order of magnitude will be |
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| 38. |
Name the type of current used in household supply. |
| Answer» Name the type of current used in household supply. | |
| 39. |
A beam of light consisting of red, green and blue color is incident on a right angled prism. The RI's of the material of the prism for above red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively. The prism will |
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Answer» A beam of light consisting of red, green and blue color is incident on a right angled prism. The RI's of the material of the prism for above red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively. The prism will
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| 40. |
The source of energy of the sun is ______. |
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Answer» The source of energy of the sun is ______. |
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| 41. |
The natural gas consists mainly of : (a) methane (b) ethane (c) propane (d) butane |
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Answer» The natural gas consists mainly of : (a) methane (b) ethane (c) propane (d) butane |
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| 42. |
A uniform solid sphere of mass 1 kg and radius 10 cm is kept stationary on a rough inclined plane by fixing a highly dense particle at B. Inclination of plane is 37∘ with horizontal and AB is the diameter of the sphere which is parallel to the plane, as shown in figure. Calculate the mass of the particle fixed at B and the minimum coefficient of fiction. |
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Answer» A uniform solid sphere of mass 1 kg and radius 10 cm is kept stationary on a rough inclined plane by fixing a highly dense particle at B. Inclination of plane is 37∘ with horizontal and AB is the diameter of the sphere which is parallel to the plane, as shown in figure. Calculate the mass of the particle fixed at B and the minimum coefficient of fiction.
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| 43. |
Write down the various forms to produce an induced current. |
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Answer» Write down the various forms to produce an induced current. |
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| 44. |
What are conductors and insulators of electricity ? Give two examples of each. |
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Answer» What are conductors and insulators of electricity ? Give two examples of each. |
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| 45. |
Why are we able to sip hot tea faster from saucer rather than from a cup? |
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Answer» Why are we able to sip hot tea faster from saucer rather than from a cup? |
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| 46. |
When excess of AgNO3 is treated with KI solution, AgI forms |
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Answer» When excess of AgNO3 is treated with KI solution, AgI forms |
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| 47. |
The conditions for equilibrium of a system of parallel forces acting in a plane is/are |
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Answer» The conditions for equilibrium of a system of parallel forces acting in a plane is/are |
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| 48. |
In S.I. system, the unit of charge is __ |
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Answer» In S.I. system, the unit of charge is |
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| 49. |
Why is the energy of flowing river water considered to be an indirect form of solar energy? |
| Answer» Why is the energy of flowing river water considered to be an indirect form of solar energy? | |
| 50. |
An electric generator converts ----------------energy into electrical energy |
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Answer» An electric generator converts ----------------energy into electrical energy |
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