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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. |
. i) A positive charge is moving vertically upwards. When it enters a region ofmagneticfield directed towards north, what is the direction of force on this particle?ii) State the rule applied to find the direction of force.What is the difference between the wires used in the element of an electric heaterand in a fuse?iii) |
| Answer» . i) A positive charge is moving vertically upwards. When it enters a region ofmagneticfield directed towards north, what is the direction of force on this particle?ii) State the rule applied to find the direction of force.What is the difference between the wires used in the element of an electric heaterand in a fuse?iii) | |
| 2. |
8.When two resistors R1 , R2 are connected in series ,they consume 12W power . When they are connected in parallel, they consume 50W power . What is the ratio of power of individual resistors, R1 and R2? |
| Answer» 8.When two resistors R1 , R2 are connected in series ,they consume 12W power . When they are connected in parallel, they consume 50W power . What is the ratio of power of individual resistors, R1 and R2? | |
| 3. |
2nd law of motion |
| Answer» 2nd law of motion | |
| 4. |
if F is the force acting on a particle having a position vector r and δ to be torque of this force about the origin ,then r.δ=0 ,F.δ=0 |
| Answer» if F is the force acting on a particle having a position vector r and δ to be torque of this force about the origin ,then r.δ=0 ,F.δ=0 | |
| 5. |
what is the effect of tempreture in change n lenght |
| Answer» what is the effect of tempreture in change n lenght | |
| 6. |
12.Two resistance 2 and 4 ohm are connected in series in an electric circuit. Ratio of thermal power dissipated in each resistance is |
| Answer» 12.Two resistance 2 and 4 ohm are connected in series in an electric circuit. Ratio of thermal power dissipated in each resistance is | |
| 7. |
In a meter bridge experiment, the resistance in the left gap is equal to 2 Ω and the bridge wire is divided in the ratio 1:2 by the jockey at the null point. The value of the resistance of the resistor in the right gap of the meter bridge is[0.77 Mark] |
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Answer» In a meter bridge experiment, the resistance in the left gap is equal to 2 Ω and the bridge wire is divided in the ratio 1:2 by the jockey at the null point. The value of the resistance of the resistor in the right gap of the meter bridge is |
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| 8. |
For the circuit shown in figure, the current supplied by battery will be |
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Answer» For the circuit shown in figure, the current supplied by battery will be |
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| 9. |
If , k are the intercepts of a focal chord of the parabola y^2=4ax , then k is equal to |
| Answer» If , k are the intercepts of a focal chord of the parabola y^2=4ax , then k is equal to | |
| 10. |
Why do only some atoms like uranium undergo nuclear fission???? |
| Answer» Why do only some atoms like uranium undergo nuclear fission???? | |
| 11. |
Polar moment of inertia (Ipin cm4) of a rectangular section having width b = 2 cm and depth d = 6cm is cm4.40 |
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Answer» Polar moment of inertia (Ipin cm4) of a rectangular section having width b = 2 cm and depth d = 6 cm is cm4.
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| 12. |
which of the metal do not evolve h_2 gas from dil. acid (1) A ({E^0}_{A^+/A}=0.25 V) (2)B ({E^0}_{B/B^+}=+0.22V) (3)C({E^0}_{C^+/C}=-0.30V) (4)D(E_{D/D^+}=+0.44V |
| Answer» which of the metal do not evolve h_2 gas from dil. acid (1) A ({E^0}_{A^+/A}=0.25 V) (2)B ({E^0}_{B/B^+}=+0.22V) (3)C({E^0}_{C^+/C}=-0.30V) (4)D(E_{D/D^+}=+0.44V | |
| 13. |
Question 25Write down the names of parts of the eye in the blank spaces shown in the figure. |
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Answer» Question 25 Write down the names of parts of the eye in the blank spaces shown in the figure. |
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| 14. |
In a step-up transformer the turns ratio is 10. The input current of the transformer is 12.5 A and the frequency is 50 Hz. If the efficiency of the transformer is 80%, then the frequency of the output current will be |
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Answer» In a step-up transformer the turns ratio is 10. The input current of the transformer is 12.5 A and the frequency is 50 Hz. If the efficiency of the transformer is 80%, then the frequency of the output current will be |
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| 15. |
78.The given circuit has two ideal diodes connected as shown in fig.The current flowing through resistance R1 will be 1) 2.5 A 2) 10.0 A 3) 1.43 A 4) 3.13 A |
| Answer» 78.The given circuit has two ideal diodes connected as shown in fig.The current flowing through resistance R1 will be 1) 2.5 A 2) 10.0 A 3) 1.43 A 4) 3.13 A | |
| 16. |
The speed of light in a transparent medium is 2.4*108 m/s .calculate absolute refractive index of the medium |
| Answer» The speed of light in a transparent medium is 2.4*108 m/s .calculate absolute refractive index of the medium | |
| 17. |
State any five steps to reduce the consumption of coal and petroleum products. |
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Answer» State any five steps to reduce the consumption of coal and petroleum products. |
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| 18. |
Two identical piano strings ,when streched with same tension T_0 ,have a fundamental frequency of 200 Hz.The tension in one of the strings is increased.When both strings vibrate together,beats frequency is 3 Hz.The fractional change in tension is? |
| Answer» Two identical piano strings ,when streched with same tension T_0 ,have a fundamental frequency of 200 Hz.The tension in one of the strings is increased.When both strings vibrate together,beats frequency is 3 Hz.The fractional change in tension is? | |
| 19. |
Why the needle of galvanometer gets oppositely deflected when the bar magnet is taken inside and outside the non current carrying solenoid in Faraday experiment? |
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Answer» Why the needle of galvanometer gets oppositely deflected when the bar magnet is taken inside and outside the non current carrying solenoid in Faraday experiment? |
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| 20. |
How speed of different light colour affect refraction or bending when change in medium for red colour it bend very little and violet colour bend very more when passes through prism so how bending works for different light colour? |
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Answer» How speed of different light colour affect refraction or bending when change in medium for red colour it bend very little and violet colour bend very more when passes through prism so how bending works for different light colour? |
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| 21. |
A 90 cm long string has fundamental frequency 124 Hz. Where should it be brushed to produce a fundamental frequency of 186 Hz? 1) 60 cm from one end 2) 30 cm from one end 3) 40 cm from one end 4) Both 1 and 2 |
| Answer» A 90 cm long string has fundamental frequency 124 Hz. Where should it be brushed to produce a fundamental frequency of 186 Hz? 1) 60 cm from one end 2) 30 cm from one end 3) 40 cm from one end 4) Both 1 and 2 | |
| 22. |
The resistance of 100 m long copper wire with diameter 1 mm is = ___ ohms. |
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Answer» The resistance of 100 m long copper wire with diameter 1 mm is = |
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| 23. |
If F is the magnitude of force experienced by a unit charge placed at a distance of 1 cm from an infinitely large charged sheet ,then what will be the force experienced by the same charge placed at a distance of 2 cm from the same sheet? |
| Answer» If F is the magnitude of force experienced by a unit charge placed at a distance of 1 cm from an infinitely large charged sheet ,then what will be the force experienced by the same charge placed at a distance of 2 cm from the same sheet? | |
| 24. |
Three identical parallel conducting plates A, B and C are placed as shown. Switches S1 and S2 are open and can connect A and C to earth when closed. +Q charge is given to B. Find the magnitude of charge flown through S1 when S1 is closed and S2 remains open. |
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Answer» Three identical parallel conducting plates A, B and C are placed as shown. Switches S1 and S2 are open and can connect A and C to earth when closed. +Q charge is given to B. Find the magnitude of charge flown through S1 when S1 is closed and S2 remains open. |
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| 25. |
Q. In a 0.2 molar aqueous solution of a weak acid HX, the degree of ionization is 0.3. The freezing point of the solution will be nearest to : (a) 0.48^° C (b) -0.48^° C (c) -0.36^° C (d) -0.26^° C. |
| Answer» Q. In a 0.2 molar aqueous solution of a weak acid HX, the degree of ionization is 0.3. The freezing point of the solution will be nearest to : (a) 0.48^° C (b) -0.48^° C (c) -0.36^° C (d) -0.26^° C. | |
| 26. |
Which of the following action are in free fall? 1. An object dropped from certain height 2. An object is thrown upward or a person jumping off 3. Flying in an aircraft 4. A car accelerating at 9.8 ms2 on the road |
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Answer» Which of the following action are in free fall? 1. An object dropped from certain height 2. An object is thrown upward or a person jumping off 3. Flying in an aircraft 4. A car accelerating at 9.8 ms2 on the road |
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| 27. |
a container is filled with hydrogen has at a pressure of 15 atm at 15^° c at what temperature will the pressure inside the container be 30 atm |
| Answer» a container is filled with hydrogen has at a pressure of 15 atm at 15^° c at what temperature will the pressure inside the container be 30 atm | |
| 28. |
A plane mirror is placed at the bottom of the tank containing a liquid of refractive index n. P is a small object at a height h above the mirror. An observer O-vertically above P outside the liquid see P and its image in the mirror. The apparent distance between these two will be: |
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Answer» A plane mirror is placed at the bottom of the tank containing a liquid of refractive index n. P is a small object at a height h above the mirror. An observer O-vertically above P outside the liquid see P and its image in the mirror. The apparent distance between these two will be: |
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| 29. |
A liquid of mass m and specific heat c is at a temperature 2T. Another liquid of mass m/2 and specific heat 2c is at a temperature T. If these two liquids are mixed, the resulting temperature of the mixture is: |
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Answer» A liquid of mass m and specific heat c is at a temperature 2T. Another liquid of mass m/2 and specific heat 2c is at a temperature T. If these two liquids are mixed, the resulting temperature of the mixture is: |
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| 30. |
Name the rule which gives the direction of induced current. |
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Answer» Name the rule which gives the direction of induced current. |
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| 31. |
What is rainbow? How is rainbow formed? [3 MARKS] |
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Answer» What is rainbow? How is rainbow formed? [3 MARKS] |
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| 32. |
Write a short note on blind spot ? |
| Answer» Write a short note on blind spot ? | |
| 33. |
Q. A Potentiometer wire has a length 10m and a resis†an ce 20Ω, its terminals are connected to a battery of emf 4V and internal resis†an ce 5Ω . what are the dis†an ce at which null points are obtained when 2 cells of emf's 1.5V and 1.3V are connected so as to A\rbrack assist B\rbrack oppose each other ? |
| Answer» Q. A Potentiometer wire has a length 10m and a resis†an ce 20Ω, its terminals are connected to a battery of emf 4V and internal resis†an ce 5Ω . what are the dis†an ce at which null points are obtained when 2 cells of emf's 1.5V and 1.3V are connected so as to A\rbrack assist B\rbrack oppose each other ? | |
| 34. |
A uniform rod of length 6meter is pivoted at a point of 1/3 of its end from one end . Another person hold this rod by applying minimum weight of 100gf . Calculate the weight of the rod? |
| Answer» A uniform rod of length 6meter is pivoted at a point of 1/3 of its end from one end . Another person hold this rod by applying minimum weight of 100gf . Calculate the weight of the rod? | |
| 35. |
If you are stuck in a forest which source of energy will you consider to be efficient and why? |
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Answer» If you are stuck in a forest which source of energy will you consider to be efficient and why? |
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| 36. |
Question 10Rays from sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?(a) 15 cm in front of the mirror(b) 30 cm in front of the mirror(c) between 15 cm and 30 cm in front of the mirror(d) more than 30 cm in front of the mirror |
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Answer» Question 10 |
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| 37. |
(a) Name one device which works on the magnetic effect of current.(b) Name one device which works on the phenomenon of electromagnetic induction.(c) Which device converts electric energy into mechanical energy?(d) Describe the principle of working of an electric motor.(e) Explain the principle of working of an electric generator. |
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Answer» (a) Name one device which works on the magnetic effect of current. (b) Name one device which works on the phenomenon of electromagnetic induction. (c) Which device converts electric energy into mechanical energy? (d) Describe the principle of working of an electric motor. (e) Explain the principle of working of an electric generator. |
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| 38. |
where you don't need a lens? |
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Answer» where you don't need a lens? |
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| 39. |
What are thin lenses? |
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Answer» What are thin lenses? |
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| 40. |
The current I drawn from the 5 V source will be |
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Answer» The current I drawn from the 5 V source will be |
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| 41. |
When a glass rod is rubbed with a silk cloth, they become ___. |
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Answer» When a glass rod is rubbed with a silk cloth, they become |
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| 42. |
A light ray entered a rectangular glass slab. if i be the angle of incidence and e be the angle of emergence, then: |
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Answer» A light ray entered a rectangular glass slab. if i be the angle of incidence and e be the angle of emergence, then: |
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| 43. |
Write the dimensions of ab in the relation E=(b-xsq)/at where E is the energy,x is the distance & t is the time. |
| Answer» Write the dimensions of ab in the relation E=(b-xsq)/at where E is the energy,x is the distance & t is the time. | |
| 44. |
Q20. Which of the following is not a feature of MIMO? |
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Answer» Q20. Which of the following is not a feature of MIMO? |
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| 45. |
What is meant by uniform and non-uniform electric fields? Will an electric field made up of equidistant and curved electric field lines be known as uniform electric field? |
| Answer» What is meant by uniform and non-uniform electric fields? Will an electric field made up of equidistant and curved electric field lines be known as uniform electric field? | |
| 46. |
Distinguish between a converging and a diverging lens. |
| Answer» Distinguish between a converging and a diverging lens. | |
| 47. |
A motor of 1HP runs at 600rpm .the work done by motor in one rotation is 1. 74.6J 2.37.3J 3.4.67J 4.14.92 |
| Answer» A motor of 1HP runs at 600rpm .the work done by motor in one rotation is 1. 74.6J 2.37.3J 3.4.67J 4.14.92 | |
| 48. |
Among the following, which effect can be used sometimes to differentiate a true solution from a colloidal solution? |
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Answer» Among the following, which effect can be used sometimes to differentiate a true solution from a colloidal solution? |
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| 49. |
Given OC = f, the focal length of the lens. Draw two rays from the linear object OO1 and obtain the image formed by the lens. [2 MARKS] |
Answer» Given OC = f, the focal length of the lens. Draw two rays from the linear object OO1 and obtain the image formed by the lens. [2 MARKS] |
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| 50. |
In a parallel circuit: |
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Answer» In a parallel circuit: |
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