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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 free charged particle moves through a magnetic field. The particle is likely to undergo a change in : |
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Answer» A free charged particle moves through a magnetic field. The particle is likely to undergo a change in : |
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| 2. |
What is the difference between n21 and n12 ? please give any difference other than v1/v2=n21 and v2/v1=n12 |
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Answer» What is the difference between n21 and n12 ? please give any difference other than v1/v2=n21 and v2/v1=n12 |
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| 3. |
Question 5 (b) In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case. (b)Taking out paste from a toothpaste tube. |
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Answer» Question 5 (b) |
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| 4. |
The mechanical advantage of an ideal single movable pulley is : (a) 1 (b) 2 (c) less than 2 (d) less than 1. |
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Answer» The mechanical advantage of an ideal single movable pulley is : (a) 1 (b) 2 (c) less than 2 (d) less than 1. |
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| 5. |
Do action and reaction forces act simultaneously? Explain. |
| Answer» Do action and reaction forces act simultaneously? Explain. | |
| 6. |
Forces of 20 N & 30 N are acting on the rod as shown in the figure. Where should an external force of 10 N be applied so that the body is in equilibrium? |
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Answer» Forces of 20 N & 30 N are acting on the rod as shown in the figure. Where should an external force of 10 N be applied so that the body is in equilibrium?
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| 7. |
The options given below consist of a pair of magnets. Which set will have an attractive force between them? |
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Answer» The options given below consist of a pair of magnets. Which set will have an attractive force between them? |
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| 8. |
Statement 1 - Apparent position of the object keeps fluctuating when seen through a hot air Statement2 - Hotter air and cooler air have same refractive index, so no dispersion happens. |
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Answer» Statement 1 - Apparent position of the object keeps fluctuating when seen through a hot air Statement2 - Hotter air and cooler air have same refractive index, so no dispersion happens. |
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| 9. |
Why different materials have different specific heat? |
| Answer» Why different materials have different specific heat? | |
| 10. |
When starter motor of a car is switched on for 0.8 s, a charge 24 C passes through the coil of the motor. Calculate the current in the coil. |
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Answer» When starter motor of a car is switched on for 0.8 s, a charge 24 C passes through the coil of the motor. Calculate the current in the coil. |
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| 11. |
Which kind of energy is wind energy? Conventional or non conventional |
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Answer» Which kind of energy is wind energy? Conventional or non conventional |
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| 12. |
The reverse biasing in a PN junction diode |
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Answer» The reverse biasing in a PN junction diode
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| 13. |
What flows through the conductor when the switch is on? |
| Answer» What flows through the conductor when the switch is on? | |
| 14. |
1 light year is equal to |
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Answer» 1 light year is equal to |
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| 15. |
Which of the following is not a stakeholder in a forest? |
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Answer» Which of the following is not a stakeholder in a forest? |
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| 16. |
Which property of light makes a pencil cast a shadow when it is held in front of a light source ? |
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Answer» Which property of light makes a pencil cast a shadow when it is held in front of a light source ? |
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| 17. |
Energy degradation is |
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Answer» Energy degradation is |
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| 18. |
A circuit contains two unequal resistances in parallel |
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Answer» A circuit contains two unequal resistances in parallel |
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| 19. |
The magnetic field inside a long straight solenoid carrying current : (a) is zero (b) decreases as we move towards its end. (c) increases as we move towards its end. (d) is the same at all points. |
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Answer» The magnetic field inside a long straight solenoid carrying current : (a) is zero (b) decreases as we move towards its end. (c) increases as we move towards its end. (d) is the same at all points. |
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| 20. |
A boy noted the readings on his home’s electricity meter on Sunday at 8 AM and again on Monday at 8 AM (see Figures below). (a) What was the meter reading on Sunday ? (b) What was the meter reading on Monday ? (c) How many units of electricity have been used ? (d) In how much time these units have been used ? (e) If the rate is Rs. 5 per unit, what is the cost of electricity used during this time ? |
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Answer» A boy noted the readings on his home’s electricity meter on Sunday at 8 AM and again on Monday at 8 AM (see Figures below).
(a) What was the meter reading on Sunday ? (b) What was the meter reading on Monday ? (c) How many units of electricity have been used ? (d) In how much time these units have been used ? (e) If the rate is Rs. 5 per unit, what is the cost of electricity used during this time ? |
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| 21. |
A man is dragging a large trunk on the ground by applying a force at an angle ‘θ’ to the horizontal. The work done by i) gravity on the trunk, ii) man on the trunk & iii) frictional force on the trunk will be |
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Answer» A man is dragging a large trunk on the ground by applying a force at an angle ‘θ’ to the horizontal. The work done by i) gravity on the trunk, ii) man on the trunk & iii) frictional force on the trunk will be |
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| 22. |
Name a natural phenomenon which is caused by the dispersion of sunlight in the sky. |
| Answer» Name a natural phenomenon which is caused by the dispersion of sunlight in the sky. | |
| 23. |
With reference to the terms mechanical advantage, velocity ratio, and efficiency of a machine, name and define the term that will not change for a machine of a given design |
| Answer» With reference to the terms mechanical advantage, velocity ratio, and efficiency of a machine, name and define the term that will not change for a machine of a given design | |
| 24. |
What is the horiontal field of view for a single-eyed human? |
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Answer» What is the horiontal field of view for a single-eyed human? |
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| 25. |
When is the current flowing through the conductor is maximum? Explain. |
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Answer» When is the current flowing through the conductor is maximum? Explain. |
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| 26. |
Question 2 In the following circuits (figure), heat produced in the resistor or combination of resistors connected to a 12V battery will be (a) same in all the cases (b) minimum in case (i) (c) maximum in case (ii) (d) maximum in case (iii) |
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Answer» Question 2 |
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| 27. |
Why concave mirror is known as converging mirror |
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Answer» Why concave mirror is known as converging mirror |
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| 28. |
Consider the following processes: 1. Wind rotates the blades of the windmill 2. Electrical energy produced 3. Turbine rotates 4. Blowing of wind Which of the following options predicts the correct order of events? |
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Answer» Consider the following processes: |
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| 29. |
State differences between Fleming's Left- Hand Rule and Fleming's Right-Hand Rule. |
| Answer» State differences between Fleming's Left- Hand Rule and Fleming's Right-Hand Rule. | |
| 30. |
The ratio of resistances of two resistors A and B connected in series is 1:4 and the current passing through them is 10A. Then the ratio of current that flows through them when connected in parallel is.. |
| Answer» The ratio of resistances of two resistors A and B connected in series is 1:4 and the current passing through them is 10A. Then the ratio of current that flows through them when connected in parallel is.. | |
| 31. |
Question 16 Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes? |
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Answer» Question 16 Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes? |
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| 32. |
The figure below shows a wheel barrow of mass 15 kg carrying a load of 30kgf with its centre of gravity at A. The points B and C are the centre of wheel and tip of the handle such that the horizontal distance AB= 20 cm and Ac = 40 cm. Find : (a) the load arm, (b) the effort arm, (c) the mechanical advantage, and (d) the minimum effort required to keep the leg just off the ground. |
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Answer» The figure below shows a wheel barrow of mass 15 kg carrying a load of 30kgf with its centre of gravity at A. The points B and C are the centre of wheel and tip of the handle such that the horizontal distance AB= 20 cm and Ac = 40 cm.
Find : (a) the load arm, (b) the effort arm, (c) the mechanical advantage, and (d) the minimum effort required to keep the leg just off the ground. |
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| 33. |
LPG consists mainly of : (a) butane (b) ethane (c) butanone (d) methane |
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Answer» LPG consists mainly of : (a) butane (b) ethane (c) butanone (d) methane |
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| 34. |
Fill in the blanks to complete the following sentences : (a) Total internal reflection occurs only when a ray of light passes from a .............................medium to a ..........................medium. (b) Critical angle is the angle of ................in denser medium for which the angle of ..............in rarer medium is ................. |
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Answer» Fill in the blanks to complete the following sentences : (a) Total internal reflection occurs only when a ray of light passes from a .............................medium to a ..........................medium. (b) Critical angle is the angle of ................in denser medium for which the angle of ..............in rarer medium is ................. |
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| 35. |
Draw a diagram of combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tensiom in each strand. Find : (i) the mechanical advantage , (ii) the velocity ratio, and (iii) the efficiency of the combination, in the ideal situation. |
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Answer» Draw a diagram of combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tensiom in each strand. Find : (i) the mechanical advantage , (ii) the velocity ratio, and (iii) the efficiency of the combination, in the ideal situation. |
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| 36. |
Which of the following statement(s) is/are true? 1. Forces in the same direction add up. 2. Two forces in opposite directions result in a net force which is equal to their difference and acts in the direction of the larger force. 3. Change in the direction of a force does not change its effect. 4. When more than one force is acting on an object, the net effect is due to resultant of all forces. |
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Answer» Which of the following statement(s) is/are true? |
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| 37. |
A man has the power of 90 W and mass 60 kg runs up a staircase in 40 seconds. If each step of the staircase is 20 cm high, calculate the number of steps. |
| Answer» A man has the power of 90 W and mass 60 kg runs up a staircase in 40 seconds. If each step of the staircase is 20 cm high, calculate the number of steps. | |
| 38. |
In the domestic circuits, each appliance has equal potential difference, to ensure this the appliances are connected in |
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Answer» In the domestic circuits, each appliance has equal potential difference, to ensure this the appliances are connected in |
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| 39. |
If a bar magnet was cut initially into two pieces. Then each of the new pieces was cut into two more pieces, and the process was repeated one more time, find out the number of the north pole generated. |
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Answer» If a bar magnet was cut initially into two pieces. Then each of the new pieces was cut into two more pieces, and the process was repeated one more time, find out the number of the north pole generated. |
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| 40. |
Name the principle on which a device that converts 12 V a.c. to 200 V a.c works on |
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Answer» Name the principle on which a device that converts 12 V a.c. to 200 V a.c works on |
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| 41. |
The correct relation between heat produced (H) and electric current is H is proportional to I H is inversely proportional to I H is proportional to I2 H is inversely proportional to. I2 |
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Answer» The correct relation between heat produced (H) and electric current is H is proportional to I H is inversely proportional to I H is proportional to I2 H is inversely proportional to. I2 |
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| 42. |
The magnification produced by a plane mirror is +1. What does this mean? |
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Answer» The magnification produced by a plane mirror is +1. What does this mean? |
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| 43. |
The term stakeholders refers to those who are directly or indirectly affected by forests. Identify the correct option regarding stakeholders. |
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Answer» The term stakeholders refers to those who are directly or indirectly affected by forests. Identify the correct option regarding stakeholders. |
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| 44. |
State whether the following statement is true or false: Chipko Andolan was associated with the conservation of wild animals such as tigers and lions. |
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Answer» State whether the following statement is true or false: |
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| 45. |
Study the following ray diagram In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by (a) y, p, z (b) x, q, z (c) p, y, z (d) p, z, y |
Answer» Study the following ray diagram In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by (a) y, p, z (b) x, q, z (c) p, y, z (d) p, z, y |
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| 46. |
A fish is looking at a 1.0 m high tower at the edge of the pond. Will the tower appear shorter or taller than its actual height to the fish? |
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Answer» A fish is looking at a 1.0 m high tower at the edge of the pond. Will the tower appear shorter or taller than its actual height to the fish? |
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| 47. |
A lens forms a virtual, erect and diminished image of an object placed at a distance of 2 m from it. The size of the image formed is half of that of the object. Which of the following statement is correct regarding the nature and focal length of the lens? |
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Answer» A lens forms a virtual, erect and diminished image of an object placed at a distance of 2 m from it. The size of the image formed is half of that of the object. Which of the following statement is correct regarding the nature and focal length of the lens?
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| 48. |
The direction of rotation of a DC motor, as shown below, is in the clockwise direction. What is direction of the magnetic field? |
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Answer» The direction of rotation of a DC motor, as shown below, is in the clockwise direction. |
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| 49. |
It is said that light rays from the sun take 8 mins to reach us. Is it applicable anywhere on the earth or only on the equator? |
| Answer» It is said that light rays from the sun take 8 mins to reach us. Is it applicable anywhere on the earth or only on the equator? | |
| 50. |
How will you connect 6 Ω, 12 Ω, 4 Ω to obtain a net resistance of 8 Ω |
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Answer» How will you connect 6 Ω, 12 Ω, 4 Ω to obtain a net resistance of 8 Ω |
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