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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. |
If there are two circular. Coils of different radii and carrying different currents .and their planes are inclined at an angle theta , so magnetic field at their common centre ? |
| Answer» If there are two circular. Coils of different radii and carrying different currents .and their planes are inclined at an angle theta , so magnetic field at their common centre ? | |
| 2. |
When a satellite is placed into a higher orbit of larger radius what happens to its KE , PE and total energy? Will they increase or decrease? |
| Answer» When a satellite is placed into a higher orbit of larger radius what happens to its KE , PE and total energy? Will they increase or decrease? | |
| 3. |
Why does it beocme more difficult to move a magnet towards a coil when the number of turns in the coil has been increased? |
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Answer» Why does it beocme more difficult to move a magnet towards a coil when the number of turns in the coil has been increased? |
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| 4. |
refractive index and permeability of medium are 1.5and 10^-6 N/A^2 respectively relative permittivity of medium is nearly |
| Answer» refractive index and permeability of medium are 1.5and 10^-6 N/A^2 respectively relative permittivity of medium is nearly | |
| 5. |
It is found that the force required to row a boat in a river is proportional to the speed of the boat. When the speed of the boat is kept v km / hr, the power expended by the boat engine is 24 horse power. What shall be the power required, if one wishes to row the boat at a speed 2v km/hr? |
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Answer» It is found that the force required to row a boat in a river is proportional to the speed of the boat. When the speed of the boat is kept v km / hr, the power expended by the boat engine is 24 horse power. What shall be the power required, if one wishes to row the boat at a speed 2v km/hr? |
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| 6. |
Calculate the weight of carbon which is burnt with excess of oxygen to form 22.4 L of CO_2 at NTP |
| Answer» Calculate the weight of carbon which is burnt with excess of oxygen to form 22.4 L of CO_2 at NTP | |
| 7. |
If 2.9×1017 J of energy is released during a nuclear fission, determine the loss in the mass in kg. |
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Answer» If 2.9×1017 J of energy is released during a nuclear fission, determine the loss in the mass in kg. |
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| 8. |
When an object is at a distance u1and u2 from a lens, real image and a virtual image is formed respectively having same magnification. The focal length of the lens is |
| Answer» When an object is at a distance u1and u2 from a lens, real image and a virtual image is formed respectively having same magnification. The focal length of the lens is | |
| 9. |
What is principal axis? |
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Answer» What is principal axis? |
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| 10. |
2.Three identical bodies each of mass m are moving in a circular orbit around a fixed point with same angular velocity. under their gravitational attraction. If the separation between any two bodies is r, then what is themoving in a circular orbit aroun, total energy possessed by the system ? |
| Answer» 2.Three identical bodies each of mass m are moving in a circular orbit around a fixed point with same angular velocity. under their gravitational attraction. If the separation between any two bodies is r, then what is themoving in a circular orbit aroun, total energy possessed by the system ? | |
| 11. |
An object is placed at 60 cm from the pole of a concave mirror, whose focal length is 20 cm? Find the distance at which the image is formed. |
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Answer» An object is placed at 60 cm from the pole of a concave mirror, whose focal length is 20 cm? Find the distance at which the image is formed. |
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| 12. |
the minimum deviation produced by a glass prism of angle 40^{o }is 36^o.the refractive index of the glaas will b |
| Answer» the minimum deviation produced by a glass prism of angle 40^{o }is 36^o.the refractive index of the glaas will b | |
| 13. |
When a bulb of resistance 1Ω is connected across another battery, it draws a constant power of 400W. What is the total power drawn when 4 such bulbs are connected in series across the second battery? |
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Answer» When a bulb of resistance 1Ω is connected across another battery, it draws a constant power of 400W. What is the total power drawn when 4 such bulbs are connected in series across the second battery? |
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| 14. |
In the mirror shown, the reflected ray will ___. |
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Answer» In the mirror shown, the reflected ray will ___.
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| 15. |
A particle is moving along a circular path of radius 5m with uniform speed 5/2 m/s. What will be average acceleration over a quarter circle |
| Answer» A particle is moving along a circular path of radius 5m with uniform speed 5/2 m/s. What will be average acceleration over a quarter circle | |
| 16. |
State the Universal law of Gravitation. |
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Answer» State the Universal law of Gravitation. |
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| 17. |
25. Goldstein discovered (1) Anode Rays (2) Proton |
| Answer» 25. Goldstein discovered (1) Anode Rays (2) Proton | |
| 18. |
The I−V characteristics of an LED is |
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Answer» The I−V characteristics of an LED is
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| 19. |
Three particles, each having a charge of 10 μC are placed at the vertices of an equilateral triangle of side 10 cm. Find the work done by a person in pulling them apart to infinite separation. |
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Answer» Three particles, each having a charge of 10 μC are placed at the vertices of an equilateral triangle of side 10 cm. Find the work done by a person in pulling them apart to infinite separation. |
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| 20. |
76.A LCRseries circuit with 100 ohm resistance is connected to an ac source of 200 V and angular frequency of 300 rad/s. When only the capacitance is removed, the current lags behind the voltage by 60 degrees. When only the inductor is removed, the current leads the voltage by 60 degrees. Average power in the circuit |
| Answer» 76.A LCRseries circuit with 100 ohm resistance is connected to an ac source of 200 V and angular frequency of 300 rad/s. When only the capacitance is removed, the current lags behind the voltage by 60 degrees. When only the inductor is removed, the current leads the voltage by 60 degrees. Average power in the circuit | |
| 21. |
The cubic unit cell of a mixed oxide is composed of oxide ions in a ccp arrangement. One fourth of the tetrahedral voids are occupied by divalent metal 'A' and the octahedral voids are occupied by a monovalent metal 'B'. The formula of the oxide is: |
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Answer» The cubic unit cell of a mixed oxide is composed of oxide ions in a ccp arrangement. One fourth of the tetrahedral voids are occupied by divalent metal 'A' and the octahedral voids are occupied by a monovalent metal 'B'. The formula of the oxide is: |
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| 22. |
The equivalent resistance of a group of resistances is R. If another resistance is connected in parallel to the group, its new equivalent becomes R1 & if it is connected in series to the group, its new equivalent becomes R2. We have |
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Answer» The equivalent resistance of a group of resistances is R. If another resistance is connected in parallel to the group, its new equivalent becomes R1 & if it is connected in series to the group, its new equivalent becomes R2. We have |
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| 23. |
44.What is reasonance? How to calculate formal charge of all three atoms of O3 molecule? |
| Answer» 44.What is reasonance? How to calculate formal charge of all three atoms of O3 molecule? | |
| 24. |
How does the poet describe the day and the atmosphere when he saw the snake? |
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Answer»
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| 25. |
A man standing between two parallel cliffs, fires a gun and hears two successive echoes after 4 and 6 seconds. Calculate the distance between the cliffs. (Vel. of sound in air is 330 ms−1) |
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Answer» A man standing between two parallel cliffs, fires a gun and hears two successive echoes after 4 and 6 seconds. Calculate the distance between the cliffs. (Vel. of sound in air is 330 ms−1) |
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| 26. |
Assertion : If the bob of a simple pendulum is kept in horizontal electric field then its period of oscillations will be unchanged Reason: If the bob is charged and kept in electric field the time period will decrease |
| Answer» Assertion : If the bob of a simple pendulum is kept in horizontal electric field then its period of oscillations will be unchanged Reason: If the bob is charged and kept in electric field the time period will decrease | |
| 27. |
57.The equivalent capacity of the combination of three capacitors each of capacity C as shown in figure between A and B is |
| Answer» 57.The equivalent capacity of the combination of three capacitors each of capacity C as shown in figure between A and B is | |
| 28. |
A beam of unpolarized light is passed first through a tourmaline crystal A and then through another tourmaline crystal B , oriented so that its principal plane is parallel to that of A. The intensity of the emergent light is I. The crystal A is now rotated by 45∘ in a plane perpendicular to the direction of the incident ray. Find the ratio of the final intensity of the emergent light, in the second case, to that in the first case. |
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Answer» A beam of unpolarized light is passed first through a tourmaline crystal A and then through another tourmaline crystal B , oriented so that its principal plane is parallel to that of A. The intensity of the emergent light is I. The crystal A is now rotated by 45∘ in a plane perpendicular to the direction of the incident ray. Find the ratio of the final intensity of the emergent light, in the second case, to that in the first case. |
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| 29. |
Two earth-satellites are revolving in the same circular orbit around the center of Earth. They must have the same ___ . |
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Answer» Two earth-satellites are revolving in the same circular orbit around the center of Earth. They must have the same |
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| 30. |
What is meant by short circuit |
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Answer» What is meant by short circuit |
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| 31. |
Draw a parallel electric circuit with two bulbs, two switches, a cell and some connecting wires. Also, show the direction of the current flowing in the circuit. |
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Answer» Draw a parallel electric circuit with two bulbs, two switches, a cell and some connecting wires. Also, show the direction of the current flowing in the circuit. |
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| 32. |
ntWhat is the frequency of DCO if two SCOs are 5% and 10% and this also shows 20% interference ? A 5% B 2% C 0.5% D 0.4%n |
| Answer» ntWhat is the frequency of DCO if two SCOs are 5% and 10% and this also shows 20% interference ? A 5% B 2% C 0.5% D 0.4%n | |
| 33. |
Explain the principle of geothermal energy. |
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Answer» Explain the principle of geothermal energy. |
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| 34. |
An alternating voltage v(t)=220 sin100πt volt is applied to a purely resistive load of 5 Ω. The time taken for the current to rise from half of the peak value to the peak value is |
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Answer» An alternating voltage v(t)=220 sin100πt volt is applied to a purely resistive load of 5 Ω. The time taken for the current to rise from half of the peak value to the peak value is |
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| 35. |
An inductance of 2H carries a current of 2A. To prevent sparking when the circuit is broken a capacitor of 2micro F is connected across the inductor. The voltage rating of the capacitor is of the order of |
| Answer» An inductance of 2H carries a current of 2A. To prevent sparking when the circuit is broken a capacitor of 2micro F is connected across the inductor. The voltage rating of the capacitor is of the order of | |
| 36. |
If the angle of incidence is at 30∘, find the angle of deflection, after reflecting 2 times. |
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Answer» If the angle of incidence is at 30∘, find the angle of deflection, after reflecting 2 times.
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| 37. |
If velocity of light becomes 1m/s then according to 'e=mc^2' energy will be equal to mass .... Can energy of a substance ever equal it's mass? |
| Answer» If velocity of light becomes 1m/s then according to 'e=mc^2' energy will be equal to mass .... Can energy of a substance ever equal it's mass? | |
| 38. |
predict the prodcts of electrolysis obtained at the electrodes in each case when Pt electrodes are used 1.an aqueous solution of AgNO_3 |
| Answer» predict the prodcts of electrolysis obtained at the electrodes in each case when Pt electrodes are used 1.an aqueous solution of AgNO_3 | |
| 39. |
Speed of light in air,Glass,water |
| Answer» Speed of light in air,Glass,water | |
| 40. |
A circular coil of radius r carries current I. The magnetic field at its center is B. at what distance from the center on the axis of the coil magnetic field will be B/8 |
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Answer» A circular coil of radius r carries current I. The magnetic field at its center is B. at what distance from the center on the axis of the coil magnetic field will be B/8 |
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| 41. |
if g is maximum at the surface and decreases as we go up or down but why does it increase as we go from equator to the poles? |
| Answer» if g is maximum at the surface and decreases as we go up or down but why does it increase as we go from equator to the poles? | |
| 42. |
A fire tong used to lift the coal from fire is what type of machine? |
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Answer» A fire tong used to lift the coal from fire is what type of machine? |
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| 43. |
What is the lens formula of a convex lens? |
| Answer» What is the lens formula of a convex lens? | |
| 44. |
Work of electric motor |
| Answer» Work of electric motor | |
| 45. |
In the case of dispersion without deviation why is the net dispersion=theta 1 + theta 2?My logic is that as the two prisms are kept in the opposite sense they are dispersing it in the opposite direction i.e. when the white light goes through the first prism the violet light is deviated the most towards the base of the prism then when the light enters the second prism the violet light is deviated upwards(which is in the opposite sense) this the angular dispersion is in the opposite sense in first and the second prism and the net dispersion should be =theta 1-theta 2 |
| Answer» In the case of dispersion without deviation why is the net dispersion=theta 1 + theta 2?My logic is that as the two prisms are kept in the opposite sense they are dispersing it in the opposite direction i.e. when the white light goes through the first prism the violet light is deviated the most towards the base of the prism then when the light enters the second prism the violet light is deviated upwards(which is in the opposite sense) this the angular dispersion is in the opposite sense in first and the second prism and the net dispersion should be =theta 1-theta 2 | |
| 46. |
6.4 kJ of energy causes a displacement of 64 m in a body in the direction of force in 2.5 seconds. Calculate the Force applied |
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Answer» 6.4 kJ of energy causes a displacement of 64 m in a body in the direction of force in 2.5 seconds. Calculate the Force applied |
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| 47. |
42.Two cells, having the same emf, are connected in series through an external resistance R. Cells have internal resistances r 1 and r 2 (r 1 > r 2) respectively. When the circuit is closed, the potential difference across the first cell is zero, The value of R is |
| Answer» 42.Two cells, having the same emf, are connected in series through an external resistance R. Cells have internal resistances r 1 and r 2 (r 1 > r 2) respectively. When the circuit is closed, the potential difference across the first cell is zero, The value of R is | |
| 48. |
A transformer has 1500 turns in the primary coil and 1125 turns in the secondary coil. If the voltage in the primary coil is 200 V, then the voltage in the secondary coil is |
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Answer» A transformer has 1500 turns in the primary coil and 1125 turns in the secondary coil. If the voltage in the primary coil is 200 V, then the voltage in the secondary coil is |
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| 49. |
Which of the following relation represents ohm's law? |
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Answer» Which of the following relation represents ohm's law? |
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| 50. |
In the figure given below, choose the correct option? |
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Answer» In the figure given below, choose the correct option?
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