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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 the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it ? Draw a labelled ray diagram to support your answer. |
| Answer» If the image formed by a spherical mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it ? Draw a labelled ray diagram to support your answer. | |
| 2. |
22.Two bulbs A and B are rated 100 w, 120 volt and 10 watt , 120 volt respectively. They are connected in parallel across a 120 volt source. Find the current in each bulb. Which bulb will consume more energy. |
| Answer» 22.Two bulbs A and B are rated 100 w, 120 volt and 10 watt , 120 volt respectively. They are connected in parallel across a 120 volt source. Find the current in each bulb. Which bulb will consume more energy. | |
| 3. |
A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens ? Draw the ray-diagram. |
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Answer» A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens ? Draw the ray-diagram. |
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| 4. |
why the current donot go through ideal voltmete |
| Answer» why the current donot go through ideal voltmete | |
| 5. |
Estimate the reduction potential for the Cu/Cu+2 electrode, for CuS, Ksp=910to the power - 36and Eo=-0. 34(log3=0.4771) |
| Answer» Estimate the reduction potential for the Cu/Cu+2 electrode, for CuS, Ksp=910to the power - 36and Eo=-0. 34(log3=0.4771) | |
| 6. |
53. If n,e,tau,m are representing electron density , charge, relaxation time and mass of an electron respectively then the resistance of wire of length l and cross sectional area A is given by |
| Answer» 53. If n,e,tau,m are representing electron density , charge, relaxation time and mass of an electron respectively then the resistance of wire of length l and cross sectional area A is given by | |
| 7. |
An object at the bottom of a beaker filled with a liquid up to height of 10 cm. If the refractive index of liquid w.r.t. air ( aµw ) is 4/3, find the apparent depth of the object. |
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Answer» An object at the bottom of a beaker filled with a liquid up to height of 10 cm. If the refractive index of liquid w.r.t. air ( aµw ) is 4/3, find the apparent depth of the object. |
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| 8. |
84. Which statement is correct? |
| Answer» 84. Which statement is correct? | |
| 9. |
84.On connecting a battery to the two opposite corners of a diagonal of a square wire frame of side 10 cm. The magnitude of the magnetic field at the centre will be (wire is uniform) (1) Zero (2) 1 microtesla (3) 2 microtesla (4) 4 microtesla |
| Answer» 84.On connecting a battery to the two opposite corners of a diagonal of a square wire frame of side 10 cm. The magnitude of the magnetic field at the centre will be (wire is uniform) (1) Zero (2) 1 microtesla (3) 2 microtesla (4) 4 microtesla | |
| 10. |
For the given power output, there exists two values of external resistance, the product of these resistances will be equal to |
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Answer» For the given power output, there exists two values of external resistance, the product of these resistances will be equal to |
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| 11. |
The magnifying power of the telescope is found to be 9 and the separation between the lenses is 20 cm for relaxed eye. The difference in focal lengths of the two lenses of the telescope (in cm) is (Integer only) |
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Answer» The magnifying power of the telescope is found to be 9 and the separation between the lenses is 20 cm for relaxed eye. The difference in focal lengths of the two lenses of the telescope (in cm) is |
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| 12. |
Question 3The most appropriate definition of a natural resource is that it is a substance/commodity that is (a) present only on land (b) a gift of nature which is very useful to mankind (c) a man-made substance placed in nature(d) available only in the forest |
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Answer» Question 3 |
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| 13. |
For the same angle of incidence of 45° the refraction angle in 3 transparent media A, B and C are 25°, 30° and 45° respectively. In which medium is the speed of light minimum and in which medium maximum? |
| Answer» For the same angle of incidence of 45° the refraction angle in 3 transparent media A, B and C are 25°, 30° and 45° respectively. In which medium is the speed of light minimum and in which medium maximum? | |
| 14. |
90. A resistance coil of 60 Ohm is immersed in 42 kg of water. A current of 7 A is passed through it. The rise in temperature of water per min is? |
| Answer» 90. A resistance coil of 60 Ohm is immersed in 42 kg of water. A current of 7 A is passed through it. The rise in temperature of water per min is? | |
| 15. |
Four students studied refraction of light through a glass prism. They traced the ray of light and measured the angle of incidence 'i' and angle of deviation δ as shown in figures 1,2,3 and 4. Which one is the correct representation? |
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Answer» Four students studied refraction of light through a glass prism. They traced the ray of light and measured the angle of incidence 'i' and angle of deviation δ as shown in figures 1,2,3 and 4. Which one is the correct representation? |
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| 16. |
In the given diagram if the arrow shows the direction of current then where will the north- pole is assumed to be? |
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Answer»
In the given diagram if the arrow shows the direction of current then where will the north- pole is assumed to be? |
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| 17. |
what is meant by magnitude? |
| Answer» what is meant by magnitude? | |
| 18. |
A worker pushes a wheelbarrow with a horizontal force of 50 N on level ground over a distance of 5.0 m. If a friction force of 43 N acts on the wheelbarrow in a direction opposite that of the worker, what work is done on the wheelbarrow by the worker |
| Answer» A worker pushes a wheelbarrow with a horizontal force of 50 N on level ground over a distance of 5.0 m. If a friction force of 43 N acts on the wheelbarrow in a direction opposite that of the worker, what work is done on the wheelbarrow by the worker | |
| 19. |
an electric fuse of rating 3A is connected in a circuit in which an electric iron of power 1kW is connected in which operates at 220 V what would happen? explain |
| Answer» an electric fuse of rating 3A is connected in a circuit in which an electric iron of power 1kW is connected in which operates at 220 V what would happen? explain | |
| 20. |
A student while doing the experiment on tracing the path of a ray of light passing through a rectangular glass slab measured the three angles marked as θ1, θ2 and θ3 in the figure.His measurements could be correct if he were to find:(1) θ1 < θ2 < θ3 (2) θ1 < θ2 but θ1 = θ3 (3) θ1 > θ2 > θ3 (4) θ1 > θ2 but θ2 = θ3 |
Answer» A student while doing the experiment on tracing the path of a ray of light passing through a rectangular glass slab measured the three angles marked as θ1, θ2 and θ3 in the figure. His measurements could be correct if he were to find: (1) θ1 < θ2 < θ3 (2) θ1 < θ2 but θ1 = θ3 (3) θ1 > θ2 > θ3 (4) θ1 > θ2 but θ2 = θ3 |
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| 21. |
An ideal power transformer is used to step up an alternating EMF of 220 V to 4.4 kV to transmit 6.6 kW of power. If the primary coil has 1000 turns, find the current in the secondary coil. |
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Answer» An ideal power transformer is used to step up an alternating EMF of 220 V to 4.4 kV to transmit 6.6 kW of power. If the primary coil has 1000 turns, find the current in the secondary coil. |
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| 22. |
A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking. (a) Name the device X. (b) What is the source of energy which cooks food in this device? (c) What is the name of the process which traps energy in this device? (d) State one advantage (Other than saving on fuel) of using such a device for cooking food. |
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Answer» A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking. |
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| 23. |
magnetic feild effect on wire |
| Answer» magnetic feild effect on wire | |
| 24. |
The work done in moving a charge of 5 C across the potential difference of 13 V is: |
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Answer» The work done in moving a charge of 5 C across the potential difference of 13 V is: |
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| 25. |
Upto what maximum distance from a concave mirror, the image can be obtained ? What will be the location of object for it ? |
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Answer» Upto what maximum distance from a concave mirror, the image can be obtained ? What will be the location of object for it ? |
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| 26. |
A shell is fired into air with initial velocity of 96 m/s at an angle of 60 degrees with the vertical .The magnitude of change in velocity till it reaches maximum height is |
| Answer» A shell is fired into air with initial velocity of 96 m/s at an angle of 60 degrees with the vertical .The magnitude of change in velocity till it reaches maximum height is | |
| 27. |
A metal 'M' crystallizes in FCC and BCC structures depending upon the temperature. The ratio of its densities in FCC and BCC structures would be |
| Answer» A metal 'M' crystallizes in FCC and BCC structures depending upon the temperature. The ratio of its densities in FCC and BCC structures would be | |
| 28. |
State the universal law of gravitation. Three masses 5kg, 2 kg and 7 kg are aligned in a straight line as shown below.Find the net gravitational force on 4 kg? [5 MARKS] |
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Answer» State the universal law of gravitation. Three masses 5kg, 2 kg and 7 kg are aligned in a straight line as shown below. Find the net gravitational force on 4 kg? [5 MARKS]  |
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| 29. |
At noon, when sun is overhead, as the distance is too small why sky isn't blue as the atmosphere has a tendency to scatter small wavelength? |
| Answer» At noon, when sun is overhead, as the distance is too small why sky isn't blue as the atmosphere has a tendency to scatter small wavelength? | |
| 30. |
a deutron and an alpha particle are placed in electric field the force acting on them are F1 and F2 and their acceleration are a1 and a2 then F1=F2F1>F2a1=a2a1 not equal to a2 |
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Answer» a deutron and an alpha particle are placed in electric field the force acting on them are F1 and F2 and their acceleration are a1 and a2 then F1=F2 F1>F2 a1=a2 a1 not equal to a2 |
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| 31. |
Six equal resistances of 1Ω each are connected to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D. |
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Answer» Six equal resistances of 1Ω each are connected to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D. |
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| 32. |
The descriptions of five kinds of images are given below : (a) diminished and virtual (b) enlarged and real (c) enlarged and erect (d) real and inverted (e) virtual and the same size Which one of these describes the image formed : (i) on the retina of the eye ? (ii) by a magnifying glass ? (iii) by a convex driving mirror on a car ? (iv) by a plane mirrior ? (v) on the screen of a slide projector ? |
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Answer» The descriptions of five kinds of images are given below : (a) diminished and virtual (b) enlarged and real (c) enlarged and erect (d) real and inverted (e) virtual and the same size Which one of these describes the image formed : (i) on the retina of the eye ? (ii) by a magnifying glass ? (iii) by a convex driving mirror on a car ? (iv) by a plane mirrior ? (v) on the screen of a slide projector ? |
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| 33. |
In one frame of reference the distance between two points is d, then the distance between the same two points in other frame of reference will be |
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Answer» In one frame of reference the distance between two points is d, then the distance between the same two points in other frame of reference will be |
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| 34. |
if the daimeter of a wire is halved the its resistance become |
| Answer» if the daimeter of a wire is halved the its resistance become | |
| 35. |
name and state the phenomena responsible for the induction of current in loop of wire kept near a current carrying conductor |
| Answer» name and state the phenomena responsible for the induction of current in loop of wire kept near a current carrying conductor | |
| 36. |
How to plot P(x) = x2/2 in graph?? |
| Answer» How to plot P(x) = x2/2 in graph?? | |
| 37. |
What substance is obtained as a residue when wood is burnt in a limited supply of air ? |
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Answer» What substance is obtained as a residue when wood is burnt in a limited supply of air ? |
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| 38. |
On addition of 0.5 mL of solution of 10% NaCl to 20 mL of red gold sol in presence of 0.025 g of starch, the coagulation is just prevented. The gold number of starch is |
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Answer» On addition of 0.5 mL of solution of 10% NaCl to 20 mL of red gold sol in presence of 0.025 g of starch, the coagulation is just prevented. The gold number of starch is |
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| 39. |
What is the force that holds electrons and nucleus |
| Answer» What is the force that holds electrons and nucleus | |
| 40. |
139.Figure shows 3 equipotential surfaces in the uniform electric field if T1 and T2 be the distance between them then relation between T1 and T2 |
| Answer» 139.Figure shows 3 equipotential surfaces in the uniform electric field if T1 and T2 be the distance between them then relation between T1 and T2 | |
| 41. |
Consider the situation shown in column - I , a real object is moving towards a fixed optical component or an optical component is moving towards a fixed object. Match the possible direction and magnitude of velocity of image as shown in Column - II. (All velocities in column- I are equal to v0 ).Which of the following options has the correct combination considering column - I and column- II. Column-I Column- II(A)(P)(B)(Q)(C)(R) More than v0(D)(S)Less than v0 (T) Equal to v0 |
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Answer» Consider the situation shown in column - I , a real object is moving towards a fixed optical component or an optical component is moving towards a fixed object. Match the possible direction and magnitude of velocity of image as shown in Column - II. (All velocities in column- I are equal to v0 ).Which of the following options has the correct combination considering column - I and column- II.
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| 42. |
70. a thin prismof crown glass( mu r=1.515,mu v=1.525) and� thin prism of flint glass(mu r =1.612,mu v =1.632) are placed in contact wth each other. Thieir refracting� angles r 5.0 degree each and r� similarly directed. Calculate d angular dispersion produced by d combination. |
| Answer» 70. a thin prismof crown glass( mu r=1.515,mu v=1.525) and� thin prism of flint glass(mu r =1.612,mu v =1.632) are placed in contact wth each other. Thieir refracting� angles r 5.0 degree each and r� similarly directed. Calculate d angular dispersion produced by d combination. | |
| 43. |
What is nerst equation |
| Answer» What is nerst equation | |
| 44. |
Four lenses of focal length \pm15 cm and \pm150 cm are available for making a telescope. To produce the largest magnification, the focal length of the eyepiece should be 1)+15 cm 2)+50 cm 3)-150 cm 4-15 cm |
| Answer» Four lenses of focal length \pm15 cm and \pm150 cm are available for making a telescope. To produce the largest magnification, the focal length of the eyepiece should be 1)+15 cm 2)+50 cm 3)-150 cm 4-15 cm | |
| 45. |
Statement1: There is a time delay between the actual sunrise and the apparent sunrise. Statement2: Since the earth is spinning on its axis, so it takes sunlight 4 minutes to travel from one longitude to another. |
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Answer» Statement1: There is a time delay between the actual sunrise and the apparent sunrise. Statement2: Since the earth is spinning on its axis, so it takes sunlight 4 minutes to travel from one longitude to another. |
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| 46. |
A stretched string resonates in fundamental node with tuning fork of frequency 512 Hz when length of the string is 0.5 m. The length of the string required to vibrate in resonance with a tuning fork of frequency 256 Hz in fundamental node would be |
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Answer» A stretched string resonates in fundamental node with tuning fork of frequency 512 Hz when length of the string is 0.5 m. The length of the string required to vibrate in resonance with a tuning fork of frequency 256 Hz in fundamental node would be |
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| 47. |
Light can be thought of which of the following to explain its various properties? |
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Answer» Light can be thought of which of the following to explain its various properties? |
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| 48. |
what is dipole dipole attraction? |
| Answer» what is dipole dipole attraction? | |
| 49. |
The most energetic electromagnetic radiations are : (a) microwaves (b) ultraviolet waves (c) X-rays (d) gamma rays. |
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Answer» The most energetic electromagnetic radiations are : (a) microwaves (b) ultraviolet waves (c) X-rays (d) gamma rays. |
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| 50. |
Two spherical bodies of mass m and 5m and radii R and 2R are released in free space with initial separation between their centres equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smaller bodybegore collision is |
| Answer» Two spherical bodies of mass m and 5m and radii R and 2R are released in free space with initial separation between their centres equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smaller bodybegore collision is | |
