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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. |
You are given the task of inducing current in a circular coil(say A). For this you are provided with a strong bar magnet and another circular coil(say B), which carries a current of 'I' amperes. Which of the following will be a wrong way to induce current in the coil for longer time? |
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Answer» You are given the task of inducing current in a circular coil(say A). For this you are provided with a strong bar magnet and another circular coil(say B), which carries a current of 'I' amperes. Which of the following will be a wrong way to induce current in the coil for longer time? |
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| 2. |
A circular wire is carrying current clockwise, the direction of magnetic field at the center is |
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Answer» A circular wire is carrying current clockwise, the direction of magnetic field at the center is |
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| 3. |
If a ball is dropped from some height H from the ground then which one is the correct graph for total energy vs height from the ground? |
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Answer» If a ball is dropped from some height H from the ground then which one is the correct graph for total energy vs height from the ground? |
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| 4. |
Which of the following is a non-polar molecule? |
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Answer» Which of the following is a non-polar molecule? |
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| 5. |
Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describes circular path of radius R1 and R2 respectively. The ratio of mass of X to that of Y is |
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Answer» Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describes circular path of radius R1 and R2 respectively. The ratio of mass of X to that of Y is |
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| 6. |
suppose you have fuses of rating 5A and 15A .what will be the rating of the combination if they are connected 1)in series 2)in parallel |
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Answer» suppose you have fuses of rating 5A and 15A .what will be the rating of the combination if they are connected 1)in series 2)in parallel |
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| 7. |
The nucleus of a _______ atom (such as uranium, plutonium or thorium), when bombarded with__________ neutrons, can be split apart into lighter nuclei. |
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Answer» The nucleus of a _______ atom (such as uranium, plutonium or thorium), when bombarded with__________ neutrons, can be split apart into lighter nuclei. |
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| 8. |
A 4 ohm resistance wire is stretched to double itself ,find the new resistance of the wire |
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Answer» A 4 ohm resistance wire is stretched to double itself ,find the new resistance of the wire |
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| 9. |
Is black hairs also donot reflect any light |
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Answer» Is black hairs also donot reflect any light |
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| 10. |
A charged particle enters at right angles into a uniform magnetic field as shown : What should be the nature of charge on the particle if it begins to move in a direction pointing vertically out of the page due to its interation with the magnetic field ? |
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Answer» A charged particle enters at right angles into a uniform magnetic field as shown :
What should be the nature of charge on the particle if it begins to move in a direction pointing vertically out of the page due to its interation with the magnetic field ? |
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| 11. |
An electron gun emits 2.0 x 1016 electrons per second. What electric current does this correspond to? |
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Answer» An electron gun emits 2.0 x 1016 electrons per second. What electric current does this correspond to? |
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| 12. |
Noopir needs a lens of power-45d for correcting his vision which is the defect he had? |
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Answer» Noopir needs a lens of power-45d for correcting his vision which is the defect he had? |
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| 13. |
The far point of a myopic eye is 20 cm. Find the power of his lens. |
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Answer» The far point of a myopic eye is 20 cm. Find the power of his lens. |
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| 14. |
The speed of light in water is 2.25 x 108m/s. If the speed of light in vacuum be 3 x 108m/s, calculate the refractive index of water. |
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Answer» The speed of light in water is 2.25 x 108m/s. If the speed of light in vacuum be 3 x 108m/s, calculate the refractive index of water. |
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| 15. |
If an angle of incidence is at 30∘. Find the angle of deflection, after reflecting 2 times. |
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Answer» If an angle of incidence is at 30∘. Find the angle of deflection, after reflecting 2 times.
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| 16. |
The image formed by a concave mirror is real, inverted and highly diminished (much smaller than the object). The object must be : (a) between pole and focus (b) at focus (c) at the centre of curvature (d) at infinity |
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Answer» The image formed by a concave mirror is real, inverted and highly diminished (much smaller than the object). The object must be : (a) between pole and focus (b) at focus (c) at the centre of curvature (d) at infinity |
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| 17. |
Consider the following data: 10 main scale division = 1cm, 10th vernier division match with 9th Main scale division. While measuring the zero error of the vernier we see that zero of vernier scale is to the right of the zero marking of the main scale with 6th vernier division coinciding with main scale divisions. The actual reading for length measurement is 4.3 cm with 2nd vernier division coinciding with main scale graduation. Estimate the length. |
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Answer» Consider the following data: 10 main scale division = 1cm, 10th vernier division match with 9th Main scale division. While measuring the zero error of the vernier we see that zero of vernier scale is to the right of the zero marking of the main scale with 6th vernier division coinciding with main scale divisions. The actual reading for length measurement is 4.3 cm with 2nd vernier division coinciding with main scale graduation. Estimate the length. |
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| 18. |
How does a voltmeter give its reading? The process. |
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Answer» How does a voltmeter give its reading? The process. |
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| 19. |
Force of 4N is applied on a body of mass 20 kg. The work done in 3rd second is |
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Answer» Force of 4N is applied on a body of mass 20 kg. The work done in 3rd second is |
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| 20. |
In solar panels, the metal used is ___ . |
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Answer» In solar panels, the metal used is |
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| 21. |
The two forces as shown in above figure are 6 N and 4 N and acting in opposite directions. The mass of the object is 2 kg. What is the acceleration of the mass? |
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Answer» The two forces as shown in above figure are 6 N and 4 N and acting in opposite directions. The mass of the object is 2 kg. What is the acceleration of the mass?
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| 22. |
In presbyopia,the near point of the eye gradually recedes away. Thus it is a case similar to hypermetropia. The why shouldn't we use a convex lens to correct this defect instead of a bifocal lens? |
| Answer» In presbyopia,the near point of the eye gradually recedes away. Thus it is a case similar to hypermetropia. The why shouldn't we use a convex lens to correct this defect instead of a bifocal lens? | |
| 23. |
Two wires, one of copper and other of iron, are of the same length oand same readius. Which will have more resistance? Give reason. Specific resistance of iron is more than that of copper. |
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Answer» Two wires, one of copper and other of iron, are of the same length oand same readius. Which will have more resistance? Give reason. |
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| 24. |
Name a material which is used for making the standard resistaor. Give a reason for your answer. |
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Answer» Name a material which is used for making the standard resistaor. Give a reason for your answer. |
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| 25. |
An object of 4cm hieght is placed at a distance 36cm from the conacve mirror having 12cm focal length. Find the position of the nature and hieght of an image. |
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Answer» An object of 4cm hieght is placed at a distance 36cm from the conacve mirror having 12cm focal length. Find the position of the nature and hieght of an image. |
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| 26. |
State the purpose of kWh meter. |
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Answer» State the purpose of kWh meter. |
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| 27. |
Choose the correct option. |
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Answer» Choose the correct option. |
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| 28. |
A convex lens of focal length 40 cm and a concave lens of focal length 25 cm are placed in contact in such a way that they have the common principal axis. Find the power of the combination. |
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Answer» A convex lens of focal length 40 cm and a concave lens of focal length 25 cm are placed in contact in such a way that they have the common principal axis. Find the power of the combination. |
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| 29. |
When current is 'switched on ' and switched off' in a coil, a current is induced in another coil kept near it . What is this phenomenon known as ? |
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Answer» When current is 'switched on ' and switched off' in a coil, a current is induced in another coil kept near it . What is this phenomenon known as ? |
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| 30. |
What purpose is served by the terminals of a three-way pin plug? Draw a diagram and name the pins. |
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Answer» What purpose is served by the terminals of a three-way pin plug? Draw a diagram and name the pins. |
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| 31. |
The figure shows a diagram of a system of four pulleys. The upper two pulleys are fixed and the lower two are movable. What are the mechanical advantage and velocity ratio of the system? |
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Answer» The figure shows a diagram of a system of four pulleys. The upper two pulleys are fixed and the lower two are movable. What are the mechanical advantage and velocity ratio of the system?
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| 32. |
16 gm sample of a radioactive element is taken from Bombay to Delhi in 2 hour and it was found that 1 gm of the element remained (undisintegrated). Half life of the element is |
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Answer» 16 gm sample of a radioactive element is taken from Bombay to Delhi in 2 hour and it was found that 1 gm of the element remained (undisintegrated). Half life of the element is |
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| 33. |
Work done is moving a unit positive test charge from one point to other inside an electric field is called ___. |
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Answer» Work done is moving a unit positive test charge from one point to other inside an electric field is called |
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| 34. |
According to the convention, the direction of flow of electric current is taken from positive terminal to the negative terminal of the battery, which is opposite to the flow of___. |
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Answer» According to the convention, the direction of flow of electric current is taken from positive terminal to the negative terminal of the battery, which is opposite to the flow of |
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| 35. |
In an electric motor, the energy transformation is (a) from electrical to chemical (b) from chemical to light (c) from mechanical to electrical (d) from electrical to mechanical. |
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Answer» In an electric motor, the energy transformation is |
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| 36. |
List the colours of the three wires in the cable connected to the plug of an electic iron. |
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Answer» List the colours of the three wires in the cable connected to the plug of an electic iron. |
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| 37. |
The magnetic field lines inside a long, current carrying solenoid are nearly _____ in shape. |
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Answer» The magnetic field lines inside a long, current carrying solenoid are nearly _____ in shape. |
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| 38. |
In a dc motor,why must the current to coil be reversed twice during each roatation? |
| Answer» In a dc motor,why must the current to coil be reversed twice during each roatation? | |
| 39. |
Question 29 (a) Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source. (a) Will the bulb in the two circuits glow with the same brightness? Justify your answer. |
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Answer» Question 29 (a) Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source. (a) Will the bulb in the two circuits glow with the same brightness? Justify your answer. |
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| 40. |
If the temperature of a gas is reduced to near absolute zero, which of the following can be attained? |
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Answer» If the temperature of a gas is reduced to near absolute zero, which of the following can be attained? |
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| 41. |
Find out the appropriate word which fits the 4th blank. |
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Answer» Find out the appropriate word which fits the 4th blank. |
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| 42. |
How does resistance of a conductor depends upon its temperature? |
| Answer» How does resistance of a conductor depends upon its temperature? | |
| 43. |
For the image formation in a concave mirror, the object distance is 5 cm and the image distance is 15 cm on the same side as that of the object. Find the magnification and nature of the image. |
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Answer» For the image formation in a concave mirror, the object distance is 5 cm and the image distance is 15 cm on the same side as that of the object. Find the magnification and nature of the image. |
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| 44. |
In some cases, the screw gauge is said to have a negative zero error. What is this negative zero error? |
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Answer» In some cases, the screw gauge is said to have a negative zero error. What is this negative zero error? |
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| 45. |
A current of 1.25 A flows in a circuit for 0.85 s. What is the electric charge in the circuit?1.0625 |
Answer» A current of 1.25 A flows in a circuit for 0.85 s. What is the electric charge in the circuit?
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| 46. |
When an object is placed 10 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 10 cm in front of lens B, the image formed is real, inverted and same size as the object. (a) What is the focal length of lens A ? (b) What is the focal length of lens B ? (c) What is the nature of lens A ? (d) What is the nature of lens B ? |
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Answer» When an object is placed 10 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 10 cm in front of lens B, the image formed is real, inverted and same size as the object. (a) What is the focal length of lens A ? (b) What is the focal length of lens B ? (c) What is the nature of lens A ? (d) What is the nature of lens B ? |
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| 47. |
Give the composition of natural gas. |
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Answer» Give the composition of natural gas. |
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| 48. |
In which colour an yellow coloured dress would appear when viewed through a blue filter? |
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Answer» In which colour an yellow coloured dress would appear when viewed through a blue filter? |
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| 49. |
Statement 1: Coal, petroleum and natural gas are called 'fossil fuels'. Statement 2: Coal, petroleum and natural gas are formed as a result of decayed plants and animals being subjected to conditions of high temperature and pressure for a prolonged period of time. |
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Answer» Statement 1: Coal, petroleum and natural gas are called 'fossil fuels'. |
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| 50. |
If a wire of resistance 1 ohm is stretched to double its length , then the resistance will become....??? |
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Answer» If a wire of resistance 1 ohm is stretched to double its length , then the resistance will become....??? |
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