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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 circular coil carrying a certain current produces a magnetic B0 at its centre. The coil is now rewound so as to have 3 turns and the same current is passed through it.the new magnetic field at the center is ?? |
| Answer» A circular coil carrying a certain current produces a magnetic B0 at its centre. The coil is now rewound so as to have 3 turns and the same current is passed through it.the new magnetic field at the center is ?? | |
| 2. |
What is the void? |
| Answer» What is the void? | |
| 3. |
Find the mechanical advantage of a block and tackle system consisting n number of pulleys. |
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Answer» Find the mechanical advantage of a block and tackle system consisting n number of pulleys. |
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| 4. |
If object is placed at 60 cm before lens I focal length of lens I is 30 cm and focal length of lens II is 45 cm. find out the image distance formed by lens II from O? |
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Answer»
If object is placed at 60 cm before lens I focal length of lens I is 30 cm and focal length of lens II is 45 cm. find out the image distance formed by lens II from O? |
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| 5. |
An electric bulb of resistance 20Ω and a a resistance wire of 4Ω are connected in series with a 6 V battery. (a) Total resistance of the circuit.(b) Current through the circuit.(c) Potential difference across the electric bulb.(d) Potential difference across the resistance wire. |
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Answer» An electric bulb of resistance 20Ω and a a resistance wire of 4Ω are connected in series with a 6 V battery. |
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| 6. |
A solenoid is 2.7 m long, has a radius 0.85 cm and has 600 turns. It carries a current i of 2.5 A. The magnitude of the magnetic field B inside the solenoid and far from the either end is |
| Answer» A solenoid is 2.7 m long, has a radius 0.85 cm and has 600 turns. It carries a current i of 2.5 A. The magnitude of the magnetic field B inside the solenoid and far from the either end is | |
| 7. |
What is the cost of using the iron for the month of January 10 has a day is 1 kilowatt hour cost rupees 3.40 |
| Answer» What is the cost of using the iron for the month of January 10 has a day is 1 kilowatt hour cost rupees 3.40 | |
| 8. |
Wont i become mass less fr some time if it happens ..... i know that without mass i cant posses energy... But then also? |
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Answer» Wont i become mass less fr some time if it happens ..... i know that without mass i cant posses energy... But then also? |
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| 9. |
An object is kept at a distance of 5 cm in front of a convex mirror of focal length 10 cm. Calculate the position and magnification of the image and state its nature. |
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Answer» An object is kept at a distance of 5 cm in front of a convex mirror of focal length 10 cm. Calculate the position and magnification of the image and state its nature. |
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| 10. |
what happens to the net current gain or voltage gain when two or more common emitter configuration amplifier are connected in-(1)series (2)parallel |
| Answer» what happens to the net current gain or voltage gain when two or more common emitter configuration amplifier are connected in-(1)series (2)parallel | |
| 11. |
In an iron cored coil , if the iron core is removed how will it affect the inductance of the coil? |
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Answer» In an iron cored coil , if the iron core is removed how will it affect the inductance of the coil? |
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| 12. |
We know that there are many advantages associated with using hydel power generation but still governments face lots of challenges. what could be possible challenges among following? |
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Answer» We know that there are many advantages associated with using hydel power generation but still governments face lots of challenges. what could be possible challenges among following? |
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| 13. |
A nucleus of mass number A originally at rest emits α-particle with speed v. The recoil speed of daughter nucleus is : |
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Answer» A nucleus of mass number A originally at rest emits α-particle with speed v. The recoil speed of daughter nucleus is : |
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| 14. |
The temperature at which molecular motion ceases is ___ K. |
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Answer» The temperature at which molecular motion ceases is |
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| 15. |
Heater coil is cut into 3 equal parts and only one part is now used in the heater instead of the original one.The heat generated by one part of the coil would be how much in comparison to that of the full length coil?? |
| Answer» Heater coil is cut into 3 equal parts and only one part is now used in the heater instead of the original one.The heat generated by one part of the coil would be how much in comparison to that of the full length coil?? | |
| 16. |
Two thin equiconvex lens of focal length 20 cm are placed with their optic centres 50 cm apart. The equivalent focal length of the combination, when the beam is incident parallel to the principal axis ,is=? |
| Answer» Two thin equiconvex lens of focal length 20 cm are placed with their optic centres 50 cm apart. The equivalent focal length of the combination, when the beam is incident parallel to the principal axis ,is=? | |
| 17. |
An electron at point A in the figure has a speed V0 of magnitude 1.41×106m/s. It enters into a uniform magnetic field and follows a semicircular path in it as shown.The magnitude of the magnetic field that will cause the electron to follow the semicircular path from A to B is? |
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Answer» An electron at point A in the figure has a speed V0 of magnitude 1.41×106m/s. It enters into a uniform magnetic field and follows a semicircular path in it as shown. |
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| 18. |
A ray of light incident at an angle of 37° on a prism of refracting angle 60° suffers minimum deviation. The angle of minimum deviation is |
| Answer» A ray of light incident at an angle of 37° on a prism of refracting angle 60° suffers minimum deviation. The angle of minimum deviation is | |
| 19. |
A pencil is placed next to a ruler such that the ends of the pencil are at 6.2 cm and 13.7 cm markings on the ruler. What is the length of this pencil?7.5 |
Answer» A pencil is placed next to a ruler such that the ends of the pencil are at 6.2 cm and 13.7 cm markings on the ruler. What is the length of this pencil?
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| 20. |
The frequency of a vibrating body is 5 Hz. Calculate its time period? |
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Answer» The frequency of a vibrating body is 5 Hz. Calculate its time period? |
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| 21. |
Total 2,500 mL of mango juice is to be packed in 5 containers. Identify the expression which correctly depicts the volume of juice in each container. |
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Answer» Total 2,500 mL of mango juice is to be packed in 5 containers. Identify the expression which correctly depicts the volume of juice in each container. |
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| 22. |
For two resistors R_1 and R_2, connected in parallel, the relative error in their equivalent { resistance is (Where R_1=(10.0\pm0.1)Ω and R_2=(20.0\pm0.4)Ω) |
| Answer» For two resistors R_1 and R_2, connected in parallel, the relative error in their equivalent { resistance is (Where R_1=(10.0\pm0.1)Ω and R_2=(20.0\pm0.4)Ω) | |
| 23. |
Which of the following will have the most negative and the least negative electron gain enthalpy ?P,S,Cl,F.Explain |
| Answer» Which of the following will have the most negative and the least negative electron gain enthalpy ?P,S,Cl,F.Explain | |
| 24. |
A beam of light is partially reflected and partially refracted from a source.The angle between reflected and refracted light ray is 90 degree if angle of refraction is 30 the angle of incident is? |
| Answer» A beam of light is partially reflected and partially refracted from a source.The angle between reflected and refracted light ray is 90 degree if angle of refraction is 30 the angle of incident is? | |
| 25. |
Question 1 A solar water heater cannot be used to get hot water on (a) a sunny day (b) a cloudy day (c) a hot day (d) a windy day |
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Answer» Question 1 A solar water heater cannot be used to get hot water on (a) a sunny day (b) a cloudy day (c) a hot day (d) a windy day |
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| 26. |
What is a screen ? and How the image formed by the plane mirror is behind it ? |
| Answer» What is a screen ? and How the image formed by the plane mirror is behind it ? | |
| 27. |
Question 7 A person has a hearing range from 20 Hz to 20 kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as 344ms−1. |
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Answer» Question 7 A person has a hearing range from 20 Hz to 20 kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as 344ms−1. |
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| 28. |
To is time period of oscillation of the needle in uniform horizontal magnetic field (BH) of earth. If another magnetic field is applied perpendicular to BH such that the needle deflects by 0 for its equilibrium. Now period of oscillation of needle is T. The relation between T and To isT^2=To^2cos©T = To cos©T = To /cos©T^2=To^2/cos© |
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Answer» To is time period of oscillation of the needle in uniform horizontal magnetic field (BH) of earth. If another magnetic field is applied perpendicular to BH such that the needle deflects by 0 for its equilibrium. Now period of oscillation of needle is T. The relation between T and To is T^2=To^2cos© T = To cos© T = To /cos© T^2=To^2/cos© |
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| 29. |
When a magnet is brought close to a wire, the magnetic field around the wire ___. |
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Answer» When a magnet is brought close to a wire, the magnetic field around the wire |
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| 30. |
Which of the following is ultimately not derived from the sun's energy (or solar energy) ? (a) wind energy (b) nuclear energy (c) biomass energy (d) ocean thermal energy |
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Answer» Which of the following is ultimately not derived from the sun's energy (or solar energy) ? |
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| 31. |
The fuel having a calorific value of 55 kj/g is likely to be: (a) biogas (b) methane gas (c) hydrogen gas (d) natural gas |
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Answer» The fuel having a calorific value of 55 kj/g is likely to be: |
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| 32. |
How can a solenoid be used to magnetise a steel bar? [1 MARK] |
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Answer» How can a solenoid be used to magnetise a steel bar? [1 MARK] |
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| 33. |
Two positive charge are mounted on track that force them to move at constant velocities. The magnetic force on the charge q1 and q2 points in the direction of |
| Answer» Two positive charge are mounted on track that force them to move at constant velocities. The magnetic force on the charge q1 and q2 points in the direction of | |
| 34. |
A student, while performing an experiment using a screw gauge observes that the screw moves 3 mm on the pitch scale when 6 complete rotations of the head scale are given. What is the pitch of the screw gauge? |
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Answer» A student, while performing an experiment using a screw gauge observes that the screw moves 3 mm on the pitch scale when 6 complete rotations of the head scale are given. What is the pitch of the screw gauge? |
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| 35. |
What happens to the other bulbs in a parallel circuit if one bulb blows off? |
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Answer» What happens to the other bulbs in a parallel circuit if one bulb blows off? |
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| 36. |
The magnetic field at the centre of a current carrying circular coil of radius 10 cm is 5√5 times the magnetic field at a point on its axis. The distance of the point from the centre of coil (in cm) is ? |
| Answer» The magnetic field at the centre of a current carrying circular coil of radius 10 cm is 5√5 times the magnetic field at a point on its axis. The distance of the point from the centre of coil (in cm) is ? | |
| 37. |
What is Kw |
| Answer» What is Kw | |
| 38. |
A thin prism P1 with angle 4 and made from glass of refractive index 1.54 is combined with another prism P2 made from glass of refractive index 1.72 to produce dispersion without deviation the angle of prism of P2 |
| Answer» A thin prism P1 with angle 4 and made from glass of refractive index 1.54 is combined with another prism P2 made from glass of refractive index 1.72 to produce dispersion without deviation the angle of prism of P2 | |
| 39. |
defination and explination of potential difference |
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Answer» defination and explination of potential difference |
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| 40. |
Law of refraction is also termed as ___ |
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Answer» Law of refraction is also termed as |
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| 41. |
Three bulbs labelled 100W 220V, 50W 220V, 200W 220V are connected in series across a 220V power supply. Calculate the total power consumed by the bulbs. |
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Answer» Three bulbs labelled 100W 220V, 50W 220V, 200W 220V are connected in series across a 220V power supply. Calculate the total power consumed by the bulbs. |
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| 42. |
Which of the following is not an ancient water harvesting structure? (a) kattas (b) sargam (c) kulhs (d) surangams |
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Answer» Which of the following is not an ancient water harvesting structure? |
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| 43. |
Why cannot we see an upside down image of the sun through the pinhole camera? |
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Answer» Why cannot we see an upside down image of the sun through the pinhole camera? |
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| 44. |
A satellite of mass m is launched vertically upward with an initial speed u from the surface of the earth. After it reaches height R (R = radius of earth), it ejects a rocket of mass m/10 so that subsequently the satellite moves in a circular orbit. The kinetic energy of the rocket is (G = gravitational constant; M is the mass of earth) |
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Answer» A satellite of mass m is launched vertically upward with an initial speed u from the surface of the earth. After it reaches height R (R = radius of earth), it ejects a rocket of mass m/10 so that subsequently the satellite moves in a circular orbit. The kinetic energy of the rocket is (G = gravitational constant; M is the mass of earth) |
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| 45. |
a ray of light is incident on a glass plate at an angle of 60 .what would be the refractive index of the glass if reflected and refracted rays are perpendicular to each other |
| Answer» a ray of light is incident on a glass plate at an angle of 60 .what would be the refractive index of the glass if reflected and refracted rays are perpendicular to each other | |
| 46. |
if a spring is divided into n numbers of pieces then what is the equivalent force cons†an |
| Answer» if a spring is divided into n numbers of pieces then what is the equivalent force cons†an | |
| 47. |
compare ionic mobillity in gas phase, aqueous phase, molten phase for alkali metals |
| Answer» compare ionic mobillity in gas phase, aqueous phase, molten phase for alkali metals | |
| 48. |
Question 1 A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power (a) + 0.5 D (b) – 0.5 D (c) + 0.2 D (d) – 0.2 D |
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Answer» Question 1 |
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| 49. |
general formula of doppler effect in light waves |
| Answer» general formula of doppler effect in light waves | |
| 50. |
light us incident on a plane glass aurface at polarizing angle 54^°.the angle between the direction of incident ray and the refracted ray i |
| Answer» light us incident on a plane glass aurface at polarizing angle 54^°.the angle between the direction of incident ray and the refracted ray i | |
