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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. |
three wires of same material h aving length in ratio 2:3:4 and mass in ratio 3:4:5 are connected in parallel across a V volt supply then the ratio of current flowing through them i |
| Answer» three wires of same material h aving length in ratio 2:3:4 and mass in ratio 3:4:5 are connected in parallel across a V volt supply then the ratio of current flowing through them i | |
| 2. |
The work done in moving a unit positive charge between two points in an electric circuit is a measure of ___ |
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Answer» The work done in moving a unit positive charge between two points in an electric circuit is a measure of |
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| 3. |
A ray of light from a denser medium strikes a rarer medium at an angle of incidence (i) as shown in the figure. The reflected and refracted rays make an angle of 90∘ with each other. The angle of reflection and refraction are (r) and (r′) respectively. The critical angle is- |
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Answer» A ray of light from a denser medium strikes a rarer medium at an angle of incidence (i) as shown in the figure. The reflected and refracted rays make an angle of 90∘ with each other. The angle of reflection and refraction are (r) and (r′) respectively. The critical angle is- |
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| 4. |
Define resistance. |
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Answer» Define resistance. |
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| 5. |
Why us concave mirror know as converging mirror |
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Answer» Why us concave mirror know as converging mirror |
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| 6. |
If you enter a dark room, what happens to the size of the pupil? |
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Answer» If you enter a dark room, what happens to the size of the pupil? |
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| 7. |
The wavelength of first member of balmer series in hydrogen spectrum is λ calculate the wavelength of the first member of lyman series in the same spectrum |
| Answer» The wavelength of first member of balmer series in hydrogen spectrum is λ calculate the wavelength of the first member of lyman series in the same spectrum | |
| 8. |
Find the average velocity of tip of the minute hand of an analog watch when it turn for 30 minutes. |
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Answer» Find the average velocity of tip of the minute hand of an analog watch when it turn for 30 minutes. |
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| 9. |
Which of the following beams is in equilibrium? |
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Answer» Which of the following beams is in equilibrium? |
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| 10. |
The angle between the direction of propagation of light and the plane of polarization is 0^° 90^° 50^° 30^° 60^° |
| Answer» The angle between the direction of propagation of light and the plane of polarization is 0^° 90^° 50^° 30^° 60^° | |
| 11. |
Two conducting cylinders of equal length but different radii are connected in series between two heat baths kept at temperatures T1=300K and T2=100K as shown in the figure. The radius of the bigger cylinder is twice that of the smaller one and the thermal conductivities of the materials of the smaller and the larger cylinders are K1 and K2 respectively. If the temperature at the junction of the two cylinders in the steady state is 200K. Then K1K2= |
Answer» Two conducting cylinders of equal length but different radii are connected in series between two heat baths kept at temperatures T1=300K and T2=100K as shown in the figure. The radius of the bigger cylinder is twice that of the smaller one and the thermal conductivities of the materials of the smaller and the larger cylinders are K1 and K2 respectively. If the temperature at the junction of the two cylinders in the steady state is 200K. Then K1K2= |
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| 12. |
if an object is held at a dis†an ce of 60 cm from a convex mirror of focal length 20 cm. At what dis†an ce from the convex mirror , should a plane mirror be held , so that the images in the two mirror coincides? |
| Answer» if an object is held at a dis†an ce of 60 cm from a convex mirror of focal length 20 cm. At what dis†an ce from the convex mirror , should a plane mirror be held , so that the images in the two mirror coincides? | |
| 13. |
A dipole with an electric moment p is located ata distance r from a long thread charged uniformlywith a linear charge density λ . Find the force Facting on the dipole if the vector p is orientedalong the thread |
| Answer» A dipole with an electric moment p is located ata distance r from a long thread charged uniformlywith a linear charge density λ . Find the force Facting on the dipole if the vector p is orientedalong the thread | |
| 14. |
An electrical device operate at 12 ampere current and 120 volt dc if it is connected with 250 volt and 32Hz the power consumption |
| Answer» An electrical device operate at 12 ampere current and 120 volt dc if it is connected with 250 volt and 32Hz the power consumption | |
| 15. |
What is the meaning of the statement: SHC of iron is 500 J/kgK |
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Answer» What is the meaning of the statement: SHC of iron is 500 J/kgK |
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| 16. |
Question 20Opposition to the construction of large dams is due to(a) social reasons(b) economic reasons(c) enviromental reasons(d) all the above |
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Answer» Question 20 |
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| 17. |
What is the far point for a normal eye? |
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Answer» What is the far point for a normal eye? |
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| 18. |
How is voltmeter connected in the circuit to measure potential difference between two points? |
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Answer» How is voltmeter connected in the circuit to measure potential difference between two points? |
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| 19. |
Who formulated the equation E = mc2, i.e. the popular mass-energy equivalence relation? |
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Answer» Who formulated the equation E = mc2, i.e. the popular mass-energy equivalence relation?
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| 20. |
6.Current flow through a resistor R reduced uniformly to zero in the time interval T.If charge flow through the resistor R in this time is Q,find the total amount of heat produced through the resistor in this time interval T |
| Answer» 6.Current flow through a resistor R reduced uniformly to zero in the time interval T.If charge flow through the resistor R in this time is Q,find the total amount of heat produced through the resistor in this time interval T | |
| 21. |
what is \sqrt[{}]{}the relation between i vapour pressure , elevation in boilling poin |
| Answer» what is \sqrt[{}]{}the relation between i vapour pressure , elevation in boilling poin | |
| 22. |
(a) What type of lens is used as a magnifying glass?(b) What type of lens is used to correct the defect of vision called myopia?(c) A convex lens has a focal length of 10.5 cm. Where should an object be placed in front of this convex lens so as to obtain an image which is real, inverted and same size as the object? |
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Answer» (a) What type of lens is used as a magnifying glass? (b) What type of lens is used to correct the defect of vision called myopia? (c) A convex lens has a focal length of 10.5 cm. Where should an object be placed in front of this convex lens so as to obtain an image which is real, inverted and same size as the object? |
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| 23. |
A nucleus with mass number 220 initially at rest emits an α-particle. If the Q value of the reaction is 5.5 MeV. Find the kinetic energy of the α-particle- |
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Answer» A nucleus with mass number 220 initially at rest emits an α-particle. If the Q value of the reaction is 5.5 MeV. Find the kinetic energy of the α-particle- |
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| 24. |
Im long wire is folded in form of a circular coil and100 mA electric current is flowing in it, thenmagnetic field at a point 1m away from its centreon its axis :-10-410210-82(2)T-510-8 |
| Answer» Im long wire is folded in form of a circular coil and100 mA electric current is flowing in it, thenmagnetic field at a point 1m away from its centreon its axis :-10-410210-82(2)T-510-8 | |
| 25. |
What is the order of discharge potential for anions with table |
| Answer» What is the order of discharge potential for anions with table | |
| 26. |
min dis†an ce of the screen from the real object such tgat a convex lens of focal length 20 cm can produce real image of the object |
| Answer» min dis†an ce of the screen from the real object such tgat a convex lens of focal length 20 cm can produce real image of the object | |
| 27. |
Consider the situation shown in following fig. The capacitor A has a charge q on it whereas B is uncharged. The charge appearing on the capacitor B, a long time after the switch S is closed is |
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Answer» Consider the situation shown in following fig. The capacitor A has a charge q on it whereas B is uncharged. The charge appearing on the capacitor B, a long time after the switch S is closed is |
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| 28. |
The focal length of a plano-convex glass lens is 20 cm (μg=1.5). The plane face of glass lens is silvered. An illuminating object is placed at a distance of 60 cm from the lens on its axis along the convex side. Then the distance (in cm) of the image is |
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Answer» The focal length of a plano-convex glass lens is 20 cm (μg=1.5). The plane face of glass lens is silvered. An illuminating object is placed at a distance of 60 cm from the lens on its axis along the convex side. Then the distance (in cm) of the image is |
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| 29. |
A straight wire carries a current verticallyupwards. A point P lies to the east of it at a smalldistance and another point Q lies to the west atthe same distance. The magnetic field at P is(consider earth field) :(1) Greater than at Q(2) Same as at Q(3) Less than at Q(4) Greater or less than at Q, depending upon thestrength of current |
| Answer» A straight wire carries a current verticallyupwards. A point P lies to the east of it at a smalldistance and another point Q lies to the west atthe same distance. The magnetic field at P is(consider earth field) :(1) Greater than at Q(2) Same as at Q(3) Less than at Q(4) Greater or less than at Q, depending upon thestrength of current | |
| 30. |
Give an account on smooth muscles. |
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Answer» Give an account on smooth muscles. |
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| 31. |
is there any trick to find valency?Or i have to memorize that |
| Answer» is there any trick to find valency?Or i have to memorize that | |
| 32. |
39. Draw a graph of signum function y=sgm(x-2/3) |
| Answer» 39. Draw a graph of signum function y=sgm(x-2/3) | |
| 33. |
Transformer is being used in instruments like |
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Answer» Transformer is being used in instruments like |
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| 34. |
The image of a tree just covers the length of a plane mirror 4 cm tall when the mirror is held 35 cm from the eye. The tree is 28 m from the mirror. What is its height? |
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Answer» The image of a tree just covers the length of a plane mirror 4 cm tall when the mirror is held 35 cm from the eye. The tree is 28 m from the mirror. What is its height? |
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| 35. |
If for a given substance melting point is TB and freezing point is TA, then correct variation shown by graph between entropy change and temperature is |
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Answer» If for a given substance melting point is TB and freezing point is TA, then correct variation shown by graph between entropy change and temperature is |
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| 36. |
What are some real life examples of total internal refracion |
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Answer» What are some real life examples of total internal refracion |
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| 37. |
How to prove analytically why ray of light bend towords the normal from rarer to denser medium and away from the normal from denser to rarer |
| Answer» How to prove analytically why ray of light bend towords the normal from rarer to denser medium and away from the normal from denser to rarer | |
| 38. |
What is the SI, unit of potential difference? |
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Answer» What is the SI, unit of potential difference? |
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| 39. |
Two identical particles having the same mass m and charges +q and −q separated by a distance d enter a uniform magnetic field B directed perpendicular to paper inwards with speeds v1 and v2 as shown in figure. The particles will not collide if |
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Answer» Two identical particles having the same mass m and charges +q and −q separated by a distance d enter a uniform magnetic field B directed perpendicular to paper inwards with speeds v1 and v2 as shown in figure. The particles will not collide if |
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| 40. |
Focal length of objective and eye lens are 1 cm and 5 cm respectively. If magnifying power of microscope is 45 when image is formed at far point then length of the microscope is |
| Answer» Focal length of objective and eye lens are 1 cm and 5 cm respectively. If magnifying power of microscope is 45 when image is formed at far point then length of the microscope is | |
| 41. |
Why solenoid are used to magnetise a piece of magnetic materials, like soft iron, when placed inside the coil? |
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Answer» Why solenoid are used to magnetise a piece of magnetic materials, like soft iron, when placed inside the coil? |
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| 42. |
What would be the gravitational potential energy of an object whose mass is 1 kg and is at a height of 10 m?(take g=9.8 ms−2) |
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Answer» What would be the gravitational potential energy of an object whose mass is 1 kg and is at a height of 10 m?(take g=9.8 ms−2) |
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| 43. |
Q 25/25 At what height above the earth's surface does the value of g becomes 36% of the value at the surface of earth? |
| Answer» Q 25/25 At what height above the earth's surface does the value of g becomes 36% of the value at the surface of earth? | |
| 44. |
A ray of monochromatic light passes from medium (I) to medium (2). If the angle ofincidence in medium 1 is θ and the corresponding angle of refraction on medium 2 is θ/2,which medium is optically denser? Give reason. |
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Answer» A ray of monochromatic light passes from medium (I) to medium (2). If the angle of incidence in medium 1 is θ and the corresponding angle of refraction on medium 2 is θ/2, which medium is optically denser? Give reason. |
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| 45. |
Binding energy per nucleon in 2He4 isGiven, Mass of 2He4 = 4.002604 amuMass of proton = 1.007825 amuMass of neutron = 1.008665 amu |
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Answer» Binding energy per nucleon in 2He4 is Given, Mass of 2He4 = 4.002604 amu Mass of proton = 1.007825 amu Mass of neutron = 1.008665 amu |
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| 46. |
The equivalent resistance between A and B is |
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Answer» The equivalent resistance between A and B is
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| 47. |
The defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred vision is called. (a) myopia (b) presbyopia (c) colourblindness (d) cataract |
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Answer» The defect of vision in which the eye-lens of a person gets progressively cloudy resulting in blurred vision is called. (a) myopia (b) presbyopia (c) colourblindness (d) cataract |
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| 48. |
Write short notes on:(1) Refraction observed in the atmosphere.(2) Dispersion of light. |
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Answer» Write short notes on: (1) Refraction observed in the atmosphere. (2) Dispersion of light. |
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| 49. |
The main difference between the 1st focus and the 2nd focus in lenses |
| Answer» The main difference between the 1st focus and the 2nd focus in lenses | |
| 50. |
If energy required for the ionization of 0.2 g atom ofNa is x kJ then the amount of energy required (in kJ)to ionize 2.3 g of Na atom is |
| Answer» If energy required for the ionization of 0.2 g atom ofNa is x kJ then the amount of energy required (in kJ)to ionize 2.3 g of Na atom is | |
