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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. |
How does a battery create a potential difference in a circuit ? |
| Answer» How does a battery create a potential difference in a circuit ? | |
| 2. |
An alternating current has frequency of 50 Hz. How many times does it change its direction in one second? [2 MARKS] |
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Answer» An alternating current has frequency of 50 Hz. How many times does it change its direction in one second? [2 MARKS] |
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| 3. |
Light scattering in colloidal particles is: |
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Answer» Light scattering in colloidal particles is: |
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| 4. |
What is meant by Power of accommodation of the eye? Name the muscles of the eye responsible for the same.. |
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Answer» What is meant by Power of accommodation of the eye? Name the muscles of the eye responsible for the same.. |
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| 5. |
Two musical notes of the same pitch and same loudness are played on two different instruments. Their wave patterns are shown in the figure. Explain why are the wave patterns different. |
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Answer» Two musical notes of the same pitch and same loudness are played on two different instruments. Their wave patterns are shown in the figure.
Explain why are the wave patterns different. |
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| 6. |
Which one of the following statements is true regarding the following elements? |
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Answer» Which one of the following statements is true regarding the following elements? |
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| 7. |
What do you mean by management of natural resources? [1 MARK] |
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Answer» What do you mean by management of natural resources? [1 MARK] |
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| 8. |
How will the magnitude of magnification change, if an object placed at the center of curvature of a concave mirror is moved towards the focus? |
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Answer» How will the magnitude of magnification change, if an object placed at the center of curvature of a concave mirror is moved towards the focus? |
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| 9. |
Name a device which is used to allow current to flow into the appliance and cut it off. |
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Answer» Name a device which is used to allow current to flow into the appliance and cut it off. |
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| 10. |
Explain why, concave mirrors are used as shaving mirrors. |
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Answer» Explain why, concave mirrors are used as shaving mirrors. |
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| 11. |
To keep a uniform meter rod of length 100 cm in an exact balanced horizontal condition using pivot, we need to place the pivot at |
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Answer» To keep a uniform meter rod of length 100 cm in an exact balanced horizontal condition using pivot, we need to place the pivot at |
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| 12. |
Refractive index between two media is related to: |
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Answer» Refractive index between two media is related to: |
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| 13. |
As light rays pass from air into a glass prism, are they refracted towards or away from the normal ? |
| Answer» As light rays pass from air into a glass prism, are they refracted towards or away from the normal ? | |
| 14. |
What frequency changes do you observe when a water-bottle is filled under a tap? |
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Answer» What frequency changes do you observe when a water-bottle is filled under a tap? |
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| 15. |
The current in a circuit |
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Answer» The current in a circuit |
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| 16. |
A wire of resistance 2 Ω is stretched to double its length such that its volume remains constant. What is the resistance of the stretched wire? |
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Answer» A wire of resistance 2 Ω is stretched to double its length such that its volume remains constant. What is the resistance of the stretched wire? |
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| 17. |
The major environmental problem in harnessing nuclear energy is how to ___. |
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Answer» The major environmental problem in harnessing nuclear energy is how to ___. |
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| 18. |
A concave lens forms an erect image of 13rd size of the object which is placed at a distance 30 cm in front of the lens. Find : (a) the position of image, and (b) the focal length of the lens. |
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Answer» A concave lens forms an erect image of 13rd size of the object which is placed at a distance 30 cm in front of the lens. Find : (a) the position of image, and (b) the focal length of the lens. |
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| 19. |
An electric bulb is rated 500W - 200V. Calculate the magnitude of the current. |
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Answer» An electric bulb is rated 500W - 200V. Calculate the magnitude of the current. |
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| 20. |
The cost of 5 litres of a milk is Rs 55. Tabulate the cost of 2, 4, and 10 litres of milk. [4 MARKS] |
| Answer» The cost of 5 litres of a milk is Rs 55. Tabulate the cost of 2, 4, and 10 litres of milk. [4 MARKS] | |
| 21. |
If AB = 10 cm & DB = 40 cm (diameter). What is the radius of curvature & focal length? |
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Answer»
If AB = 10 cm & DB = 40 cm (diameter). What is the radius of curvature & focal length? |
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| 22. |
Label the eye parts correctly. |
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Answer» Label the eye parts correctly.
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| 23. |
When a coil is rotated in a magnetic field and is connected to a circuit using slip rings, the direction of current in the circuit: |
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Answer» When a coil is rotated in a magnetic field and is connected to a circuit using slip rings, the direction of current in the circuit: |
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| 24. |
If a heater of resistance 100 Ω draws a current of 5 A for 1 hour, then the energy consumed by the heater is: |
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Answer» If a heater of resistance 100 Ω draws a current of 5 A for 1 hour, then the energy consumed by the heater is: |
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| 25. |
Which uses more energy, a 250 W TV set in 1 h, or a 1200 W toaster in 10 minutes? |
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Answer» Which uses more energy, a 250 W TV set in 1 h, or a 1200 W toaster in 10 minutes? |
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| 26. |
A motor that pumps up water to a tank requires 10kW power. Its operating voltage is 220V. The only available resistor has a resistance of 11Ω. We know that we must use n such resistors in series and p such series resistor combinations in parallel. The values of n and p are respectively |
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Answer» A motor that pumps up water to a tank requires 10kW power. Its operating voltage is 220V. The only available resistor has a resistance of 11Ω. We know that we must use n such resistors in series and p such series resistor combinations in parallel. The values of n and p are respectively |
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| 27. |
For the arrangement shown below, if we want to change the direction in which the magnetic needle gets deflected, then which of the following can be done? |
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Answer» For the arrangement shown below, if we want to change the direction in which the magnetic needle gets deflected, then which of the following can be done?
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| 28. |
Angle of deviation depends upon which of the following |
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Answer» Angle of deviation depends upon which of the following |
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| 29. |
A body of mass 2kg is hung on a spring balance mounted vertically in a lift . If the lift descends with an acceleration equal to the acceleration due to gravity 'g' , the reading on the spring balance will be (A)2kg (B) (4×g)kg (C) (2×g)kg (D) Zero |
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Answer» A body of mass 2kg is hung on a spring balance mounted vertically in a lift . If the lift descends with an acceleration equal to the acceleration due to gravity 'g' , the reading on the spring balance will be (A)2kg (B) (4×g)kg (C) (2×g)kg (D) Zero |
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| 30. |
Which quantities are measured in the same unit? |
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Answer» Which quantities are measured in the same unit? |
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| 31. |
Choose which of the following options are correct. |
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Answer» Choose which of the following options are correct. |
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| 32. |
While determining focal length of given concave mirror by focusing a distant object on the screen you always get in the begi nnind a blurred image on the screen . In order to obtain a sharp image on the screen in which direction we have to move the mirror? |
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Answer» While determining focal length of given concave mirror by focusing a distant object on the screen you always get in the begi nnind a blurred image on the screen . In order to obtain a sharp image on the screen in which direction we have to move the mirror? |
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| 33. |
A particle is fired vertically upward with a speed of 9.8 km/s. Find the maximum height attained by the particle. Radius of earth = 6400 km and g at the surface = 9.8m/s2. Consider only earth's gravitation. |
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Answer» A particle is fired vertically upward with a speed of 9.8 km/s. Find the maximum height attained by the particle. Radius of earth = 6400 km and g at the surface = 9.8m/s2. Consider only earth's gravitation. |
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| 34. |
Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward. 3. Flying in an aircraft. 4. A car accelerating at 9.8 ms−2 on the road. |
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Answer» Which of the following actions are in free fall? 1. An object dropped from a certain height. |
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| 35. |
An object is placed at a distance 10m from convex mirror of focal length 5cm. |
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Answer» An object is placed at a distance 10m from convex mirror of focal length 5cm. |
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| 36. |
The equivalent resistance between (a) & (b) in the circuit can be obtained by the expression: |
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Answer» The equivalent resistance between (a) & (b) in the circuit can be obtained by the expression: |
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| 37. |
Compare how an ammeter and a voltmeter are connected in a circuit. |
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Answer» Compare how an ammeter and a voltmeter are connected in a circuit. |
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| 38. |
(a) What is the difference between alternating current and direct current ? (b) What type of current is given by (i) a dry cell, and (ii) a power house generator ? |
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Answer» (a) What is the difference between alternating current and direct current ? (b) What type of current is given by (i) a dry cell, and (ii) a power house generator ? |
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| 39. |
What is tidal energy? |
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Answer» What is tidal energy? |
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| 40. |
What if the ammeter is connected in parallel to a ciruit and voltmeter is connected in seried to the circuit.??? |
| Answer» What if the ammeter is connected in parallel to a ciruit and voltmeter is connected in seried to the circuit.??? | |
| 41. |
How to measure a voltmeter or an ammeter? |
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Answer» How to measure a voltmeter or an ammeter? |
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| 42. |
A substance of mass M kg requires an input power P to keep it in molten state. If the latent heat of fusion of substance is L, then how long will it take to solidify it completely? |
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Answer» A substance of mass M kg requires an input power P to keep it in molten state. If the latent heat of fusion of substance is L, then how long will it take to solidify it completely? |
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| 43. |
What are coulombs and ampere? |
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Answer» What are coulombs and ampere? |
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| 44. |
How can the number of protons decrease when electric current is flowing |
| Answer» How can the number of protons decrease when electric current is flowing | |
| 45. |
Differentiate between focus of a concave mirror and a convex mirror? |
| Answer» Differentiate between focus of a concave mirror and a convex mirror? | |
| 46. |
Three equal resistors connected in series across a source of emf together dissipate 5watt of power. If the same resistors are connected in parallel across the same source of emf, the power dissipated will be |
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Answer» Three equal resistors connected in series across a source of emf together dissipate 5watt of power. If the same resistors are connected in parallel across the same source of emf, the power dissipated will be |
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| 47. |
How do we find the speed of light? |
| Answer» How do we find the speed of light? | |
| 48. |
On addition of one ml solution of to 10 ml gold sol in the presence of 0.25 gm of starch, the coagulation is just prevented. Starch has the following gold number [MP PET/PMT 1988] |
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Answer» On addition of one ml solution of of 0.25 gm of starch, the coagulation is just prevented. Starch has the following gold number
[MP PET/PMT 1988] |
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| 49. |
A ball is placed in a trough as shown. This can be categorised as? |
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Answer» A ball is placed in a trough as shown. This can be categorised as? |
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| 50. |
If the mass of a body is 5 kg, its weight on the surface of the earth would beN. Take g=9.8 ms−2 |
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Answer» If the mass of a body is 5 kg, its weight on the surface of the earth would be |
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