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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. |
In myopia, the image is formed: |
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Answer» In myopia, the image is formed:
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| 2. |
A current I is flows in an infinitely long wire withcrossection in the form of a semicircular ring of radius R.The magnitude of the magnetic induction along its axis s: |
| Answer» A current I is flows in an infinitely long wire withcrossection in the form of a semicircular ring of radius R.The magnitude of the magnetic induction along its axis s: | |
| 3. |
An insulated copper wire is wound on a soft iron core. Current is passed through the coil such that at end ‘A’ the current flows anti- clockwise and a magnetic compass needle placed at other end ‘B’ of the coil. i) What polarity is created at B? ii) How is the magnetic compass affected when current flows through the coil? |
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Answer» An insulated copper wire is wound on a soft iron core. Current is passed through the coil such that at end ‘A’ the current flows anti- clockwise and a magnetic compass needle placed at other end ‘B’ of the coil. i) What polarity is created at B? ii) How is the magnetic compass affected when current flows through the coil? |
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| 4. |
If a particle starting from mean position is in SHM with tine period T, then time taken by the particle to complete 3/8 oscillation is1] 3T/82] 5T/83] T/124] T/6 |
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Answer» If a particle starting from mean position is in SHM with tine period T, then time taken by the particle to complete 3/8 oscillation is 1] 3T/8 2] 5T/8 3] T/12 4] T/6 |
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| 5. |
A boy is standing on a weighing machine in a lift and the reading of the scale is 600 N. The lift experienced a breakdown and started falling freely under the action of gravity, what would be the reading of the scale? |
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Answer» A boy is standing on a weighing machine in a lift and the reading of the scale is 600 N. The lift experienced a breakdown and started falling freely under the action of gravity, what would be the reading of the scale? |
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| 6. |
10.Explain in brief the point of inflextion and the associated fomulae with it . In the magnetic field due to current carrying circular coil. |
| Answer» 10.Explain in brief the point of inflextion and the associated fomulae with it . In the magnetic field due to current carrying circular coil. | |
| 7. |
If light ray from air enters into 3 mediums, with refracted angle as 45∘, 30∘ and 60∘ respectively. Find out the denser medium among above 3. |
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Answer» If light ray from air enters into 3 mediums, with refracted angle as 45∘, 30∘ and 60∘ respectively. Find out the denser medium among above 3.
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| 8. |
Coal is said to be formed from the wood of trees. Why then is coal considered to be a non-renewable source of energy whereas wood is a renewable source of energy? |
| Answer» Coal is said to be formed from the wood of trees. Why then is coal considered to be a non-renewable source of energy whereas wood is a renewable source of energy? | |
| 9. |
21.A solenoid having a core of cross section 4 cm square half air and half iron (relative permeability is equal to 500) is 22 cm long if the number of turns on it is 10 power 3 its self inductance is |
| Answer» 21.A solenoid having a core of cross section 4 cm square half air and half iron (relative permeability is equal to 500) is 22 cm long if the number of turns on it is 10 power 3 its self inductance is | |
| 10. |
The resistance of some substances become zero at very low temperature. Such substances are called : |
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Answer» The resistance of some substances become zero at very low temperature. Such substances are called : |
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| 11. |
In the circuit shown here, what is the value of the unknown resistance R so that the equivalent resistance of the circuit between points P and Q is also equal to R : - |
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Answer» In the circuit shown here, what is the value of the unknown resistance R so that the equivalent resistance of the circuit between points P and Q is also equal to R : - |
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| 12. |
A bulb is rated at 230V- 100W. What is its resistance? Two such bulbs are switched-on for 4 hours continously. How much electrical energy is consumed by these two bulbs together? |
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Answer» A bulb is rated at 230V- 100W. What is its resistance? Two such bulbs are switched-on for 4 hours continously. How much electrical energy is consumed by these two bulbs together? |
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| 13. |
With the increase in temperature, the resistance of a pure metal ____. |
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Answer» With the increase in temperature, the resistance of a pure metal ____. |
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| 14. |
Question 4 (c)How can you as an individual contribute or make a difference to the management of (c) coal and petroleum? |
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Answer» Question 4 (c) How can you as an individual contribute or make a difference to the management of (c) coal and petroleum? |
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| 15. |
I m having confusion in determining direction of Tension of string in complex free body diagrams |
| Answer» I m having confusion in determining direction of Tension of string in complex free body diagrams | |
| 16. |
33. Find the value of equivalent resistance between A & B point in the following circuit.(the value of each resistance in this circuit is r) |
| Answer» 33. Find the value of equivalent resistance between A & B point in the following circuit.(the value of each resistance in this circuit is r) | |
| 17. |
The work done by the tension in the string of a simple pendulum during one complete oscillation is equal to |
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Answer» The work done by the tension in the string of a simple pendulum during one complete oscillation is equal to |
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| 18. |
A machine gun has a mass of 20 kg fires 35 g bullets at the rate of 400 bullets per second with a speed of 400ms-1 .What force must be applied to the gun to keep in the position? |
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Answer» A machine gun has a mass of 20 kg fires 35 g bullets at the rate of 400 bullets per second with a speed of 400ms-1 .What force must be applied to the gun to keep in the position? |
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| 19. |
A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor. He reports that:(i) the direction of deflection of the north pole of a compass needle kept at a given point near the conductor remains unaffected even when the terminals of the battery sending current in the wire are interchanged.(ii) for a given battery, the degree of deflection of a N-pole decreases when the compass is kept at a point farther away from the conductor.Which of the above observations of the student is incorrect and why? |
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Answer» A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor. He reports that: (i) the direction of deflection of the north pole of a compass needle kept at a given point near the conductor remains unaffected even when the terminals of the battery sending current in the wire are interchanged. (ii) for a given battery, the degree of deflection of a N-pole decreases when the compass is kept at a point farther away from the conductor. Which of the above observations of the student is incorrect and why? |
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| 20. |
In the circuit diagram shown below, three resistors of resistance 1Ω,2Ω and 3Ω are connected to a cell of EMF 2V and internal resistance 0.5Ω. (a) Calculate the total resistance of the circuit. (b) What is the reading of the ammeter? (c) What will be the ammeter reading if an exactly similar cell is connected in series with the given cell? [5 MARKS] |
Answer» In the circuit diagram shown below, three resistors of resistance 1Ω,2Ω and 3Ω are connected to a cell of EMF 2V and internal resistance 0.5Ω. (a) Calculate the total resistance of the circuit. (b) What is the reading of the ammeter? (c) What will be the ammeter reading if an exactly similar cell is connected in series with the given cell? [5 MARKS] |
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| 21. |
A magnifying lens has a focal length of 100 mm. An object whose size is 16 mm is placed at some distance from the lens so that an image is formed at a distance of 25 cm in front of the lens. (a) What is the distance between the object and the lens? (b) Where should the object be placed if the image is to form at infinity? |
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Answer» A magnifying lens has a focal length of 100 mm. An object whose size is 16 mm is placed at some distance from the lens so that an image is formed at a distance of 25 cm in front of the lens. (a) What is the distance between the object and the lens? (b) Where should the object be placed if the image is to form at infinity? |
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| 22. |
GSLV-D6 successfully launched GSAT-6 communication satellite. This is the third time the indigenously developed Cryogenic Upper Stage (CUS) is being carried on-board during a GSLV flight. With reference to this consider the following statements: Which of the above statements are correct? |
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Answer» GSLV-D6 successfully launched GSAT-6 communication satellite. This is the third time the indigenously developed Cryogenic Upper Stage (CUS) is being carried on-board during a GSLV flight. With reference to this consider the following statements: Which of the above statements are correct? |
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| 23. |
38.Suppose a small angled prism of 6^° deviates a ray through 3^° , then the refractive index is 1. 1.62. 2. 1.33 3. 1.5. 4. 1.72 |
| Answer» 38.Suppose a small angled prism of 6^° deviates a ray through 3^° , then the refractive index is 1. 1.62. 2. 1.33 3. 1.5. 4. 1.72 | |
| 24. |
Four point charges q1=2c,q2=-5c,qc=2c,qd=-5c are locared at the corners of a square ABCD of side 10 cm. What is the force on a charge of 1c placed at the centre of the square? |
| Answer» Four point charges q1=2c,q2=-5c,qc=2c,qd=-5c are locared at the corners of a square ABCD of side 10 cm. What is the force on a charge of 1c placed at the centre of the square? | |
| 25. |
A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field B such that B is perpendicular to the plane of the loop. The magnetic force acting on the loop is |
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Answer» A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field B such that B is perpendicular to the plane of the loop. The magnetic force acting on the loop is |
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| 26. |
In the circuit diagram, Find: (i) total resistance (ii) current shown by the ammeter A |
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Answer» In the circuit diagram, Find: (i) total resistance (ii) current shown by the ammeter A
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| 27. |
a refrigerator works between 0c and 45 c .it is required to remove 2000 J of heat per second in order to keep the temperature of freezer constant .the electric power required is about (1) 110 w(2) 220 w(3) 330 w (4) 260 w |
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Answer» a refrigerator works between 0c and 45 c .it is required to remove 2000 J of heat per second in order to keep the temperature of freezer constant .the electric power required is about (1) 110 w (2) 220 w (3) 330 w (4) 260 w |
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| 28. |
(a) What is meant by saying that the potential difference between two points is 1 volt? Name a device that helps to measure the potential difference across a conductor.(b)Why does the connecting cord of an electric heater not glow hot while the heating element does?(c) Electrical resistivities of some substances at 20°C are given below: Silver 1.60 × 10−8 Ωm Copper 1.62 × 10−8 Ωm Tungsten 5.20 × 10−8 Ωm Iron 10.0 × 10−8 Ωm Mercury 94.0 × 10−8 Ωm Nichrome 100 × 10−6 Ωm Answer the following questions in relation to them:(i) Among silver and copper, which one is a better conductor? Why?(ii) Which material would you advise to be used in electrical heating devices? Why? |
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Answer» (a) What is meant by saying that the potential difference between two points is 1 volt? Name a device that helps to measure the potential difference across a conductor. (b)Why does the connecting cord of an electric heater not glow hot while the heating element does? (c) Electrical resistivities of some substances at 20°C are given below:
Answer the following questions in relation to them: (i) Among silver and copper, which one is a better conductor? Why? (ii) Which material would you advise to be used in electrical heating devices? Why? |
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| 29. |
42. Ten tuning forks are arranged in increasing order of frequency in such a way that any two consecutive tuning forks produce 4 beats per second the highest frequency is twice that of the lowest possible highest and lowest frequency in Hz are 1)80 and 40 2)100 and 50 3)44 and 22 4)72 and 36 |
| Answer» 42. Ten tuning forks are arranged in increasing order of frequency in such a way that any two consecutive tuning forks produce 4 beats per second the highest frequency is twice that of the lowest possible highest and lowest frequency in Hz are 1)80 and 40 2)100 and 50 3)44 and 22 4)72 and 36 | |
| 30. |
Even when the objects are at different distances from the eye, clear images are formed on the retina. What can be the reason behind this? |
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Answer» Even when the objects are at different distances from the eye, clear images are formed on the retina. What can be the reason behind this? |
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| 31. |
Resistance n, each of r ohm, when connected in parallel give an Equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohms, equal to |
| Answer» Resistance n, each of r ohm, when connected in parallel give an Equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohms, equal to | |
| 32. |
In the given arrangement consider a pulley |
| Answer» In the given arrangement consider a pulley | |
| 33. |
Question 36Although wood has a very high calorific value, we still discourage its use as a fuel. Explain. |
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Answer» Question 36 Although wood has a very high calorific value, we still discourage its use as a fuel. Explain. |
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| 34. |
A long straight cylindrical wire of radius R carries a current distributed uniformly over its cross section. Find the locations where magnetic field is maximum and minimum |
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Answer» A long straight cylindrical wire of radius R carries a current distributed uniformly over its cross section. Find the locations where magnetic field is maximum and minimum |
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| 35. |
The only correct statement for the two circuits (X) and (Y) shown below is :(1) The resistors R1 and R2 have been connected in series in both the circuits(2) The resistors R1 and R2 have been connected in parallel in both the circuits(3) In the circuit (X) the resistors have been connected in parallel whereas these are connected in series in circuit (Y)(4) In the circuit (X) the resistors R1 and R2 are connected in series while these are connected in parallel in circuit (Y) |
Answer» The only correct statement for the two circuits (X) and (Y) shown below is : (1) The resistors R1 and R2 have been connected in series in both the circuits (2) The resistors R1 and R2 have been connected in parallel in both the circuits (3) In the circuit (X) the resistors have been connected in parallel whereas these are connected in series in circuit (Y) (4) In the circuit (X) the resistors R1 and R2 are connected in series while these are connected in parallel in circuit (Y) |
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| 36. |
How can we know that the sign of focal length? |
| Answer» How can we know that the sign of focal length? | |
| 37. |
A fish in an aquarium, 30 cm deep in water (μ=4/3) can see a light bulb kept 50 cm above the surface of water. The fish can also see the image of this bulb in the reflecting bottom surface of the aquarium. Total depth of water is 60 cm. Then, the apparent distance between the two images seen by the fish is |
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Answer» A fish in an aquarium, 30 cm deep in water (μ=4/3) can see a light bulb kept 50 cm above the surface of water. The fish can also see the image of this bulb in the reflecting bottom surface of the aquarium. Total depth of water is 60 cm. Then, the apparent distance between the two images seen by the fish is |
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| 38. |
The process of mixing up of two liquids can speed up by adjusting which surrounding condition? |
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Answer» The process of mixing up of two liquids can speed up by adjusting which surrounding condition? |
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| 39. |
The current in a conductor varies with time t as I=3t+4t2, where I is in amperes and t in seconds. The electric charge that flows through the section of the conductor between t = 1 s and t = 3 s is |
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Answer» The current in a conductor varies with time t as I=3t+4t2, where I is in amperes and t in seconds. The electric charge that flows through the section of the conductor between t = 1 s and t = 3 s is |
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| 40. |
The voltage that is induced by the motion of a conductor across a magnetic field is called _____. |
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Answer» The voltage that is induced by the motion of a conductor across a magnetic field is called _____. |
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| 41. |
The expression for the magnification of a spherical mirror in terms of focal length (f) and the distance of the object from mirror (u) is : |
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Answer» The expression for the magnification of a spherical mirror in terms of focal length (f) and the distance of the object from mirror (u) is : |
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| 42. |
if U is equal to zero then we are unable to calculate force is it correct? |
| Answer» if U is equal to zero then we are unable to calculate force is it correct? | |
| 43. |
Rainbows are formed due to ________. |
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Answer» Rainbows are formed due to ________. |
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| 44. |
Integrate secx |
| Answer» Integrate secx | |
| 45. |
Explain:Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal? |
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Answer» Explain: Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal? |
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| 46. |
Riaz needs a box which can absorb the heat from the sun very fast but loses it very slowly. How should the outer and the inner surface of the box be coloured so that Riaz gets the best result? |
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Answer» Riaz needs a box which can absorb the heat from the sun very fast but loses it very slowly. How should the outer and the inner surface of the box be coloured so that Riaz gets the best result? |
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| 47. |
Please define the term according to exam point of view , that is , how shall I write the correct definition of this term in exam . => Focal plane |
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Answer» Please define the term according to exam point of view , that is , how shall I write the correct definition of this term in exam . => Focal plane |
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| 48. |
Metals are good conductors of electricity but glass is a bad conductor. Why? |
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Answer» Metals are good conductors of electricity but glass is a bad conductor. Why? |
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| 49. |
For a rocket propulsion velocity of exhaust gases relative to rocket is 2km/s if mass of rocket system is 1000kg then the rate of fuel consumption for a rocket to rise up with an acceleration 4.9m/s(square) will be |
| Answer» For a rocket propulsion velocity of exhaust gases relative to rocket is 2km/s if mass of rocket system is 1000kg then the rate of fuel consumption for a rocket to rise up with an acceleration 4.9m/s(square) will be | |
| 50. |
An object is placed at a distance of 10 cm from a convex lens of power 5D.The position of the image is ? |
| Answer» An object is placed at a distance of 10 cm from a convex lens of power 5D.The position of the image is ? | |
