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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 resistance of a conductor is 5 ohm at 50 degree Celsius and 7 ohm at 100 degree celsius then the mean temperature coefficient of resistance (of the material) is? |
| Answer» If the resistance of a conductor is 5 ohm at 50 degree Celsius and 7 ohm at 100 degree celsius then the mean temperature coefficient of resistance (of the material) is? | |
| 2. |
a copper rod of length l is rotating about midpoint of rod perpendicular to the magnetic field B with cons†an t angular velocity ω.the induced emf between the two ends i |
| Answer» a copper rod of length l is rotating about midpoint of rod perpendicular to the magnetic field B with cons†an t angular velocity ω.the induced emf between the two ends i | |
| 3. |
A projectile is projected with 50 m/s at an angle53 with horizontal. The angle made by theprojectile with horizontal at t 1 s is (g 10 m/s2)(1) 37^° (2) 45^° (3) 30^° (4) 60^° |
| Answer» A projectile is projected with 50 m/s at an angle53 with horizontal. The angle made by theprojectile with horizontal at t 1 s is (g 10 m/s2)(1) 37^° (2) 45^° (3) 30^° (4) 60^° | |
| 4. |
A battery of emf 12 V and internal resistance 2Ω is connected to a 4Ω resistor as shown in the figure.(a) Show that a voltmeter when placed across the cell and across the resistor, in turn, gives the same reading.(b) To record the voltage and the current in the circuit, why is the voltmeter placed in parallel and the ammeter in series in the circuit ? |
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Answer» A battery of emf 12 V and internal resistance 2Ω is connected to a 4Ω resistor as shown in the figure. (a) Show that a voltmeter when placed across the cell and across the resistor, in turn, gives the same reading. (b) To record the voltage and the current in the circuit, why is the voltmeter placed in parallel and the ammeter in series in the circuit ?  |
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| 5. |
The wavelength of two electromagnetic radiation is400 nm and 200 nm. Thus, the ratio of theirvelocities will be equal toL(1) 1:1(2) 1 2(3) 3:1(4) 2:3 |
| Answer» The wavelength of two electromagnetic radiation is400 nm and 200 nm. Thus, the ratio of theirvelocities will be equal toL(1) 1:1(2) 1 2(3) 3:1(4) 2:3 | |
| 6. |
how to compare heat of combustion of alkene |
| Answer» how to compare heat of combustion of alkene | |
| 7. |
Monochromatic light of wavelength 4300 A^†extdegree faslls on a slit of width 'a'. For what value of 'a' the first maximum falls at 30^° ? |
| Answer» Monochromatic light of wavelength 4300 A^†extdegree faslls on a slit of width 'a'. For what value of 'a' the first maximum falls at 30^° ? | |
| 8. |
Two parallel wires are carrying electric currents of equal magnitude and in the same direction. They exert: |
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Answer» Two parallel wires are carrying electric currents of equal magnitude and in the same direction. They exert: |
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| 9. |
What is the equivalent resistance between A and B in the circuit of figure if R=3 Ω. |
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Answer» What is the equivalent resistance between A and B in the circuit of figure if R=3 Ω. |
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| 10. |
A point source of light O of a single color is seen through a rectangular glass slab PQRS. The paths of two rays, in and outside the slab, are shown in the given figure. In the diagram, what is the position I of the source O, when seen through the surface RS? |
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Answer» A point source of light O of a single color is seen through a rectangular glass slab PQRS. The paths of two rays, in and outside the slab, are shown in the given figure. In the diagram, what is the position I of the source O, when seen through the surface RS?
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| 11. |
Consider the following beam The magnitude of maximum value of bending moment of D due to the moving vertically downward load of 20 kN is ______ kNm.40 |
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Answer» Consider the following beam The magnitude of maximum value of bending moment of D due to the moving vertically downward load of 20 kN is ______ kNm. 
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| 12. |
Can electric field and force can have opposite direction?? |
| Answer» Can electric field and force can have opposite direction?? | |
| 13. |
To a bird in air a fish in water appears to be 30cm from its surface if auw =4/3 then the true depth of fish is: 30cm 40cm 45cm None of these |
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Answer» To a bird in air a fish in water appears to be 30cm from its surface if auw =4/3 then the true depth of fish is: 30cm 40cm 45cm None of these |
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| 14. |
A particle performs SHM of amplitude A along a straight line.When it is at a dis†an ce \sqrt3/2A from mean position ,its kinetic energy gets incresed by an amount 1/2mω^2A^{2 }due to an impulsve force .Then its new amplitude becomes |
| Answer» A particle performs SHM of amplitude A along a straight line.When it is at a dis†an ce \sqrt3/2A from mean position ,its kinetic energy gets incresed by an amount 1/2mω^2A^{2 }due to an impulsve force .Then its new amplitude becomes | |
| 15. |
Which of the following is used as a moderator in the reactor of a nuclear power station ? (a) liquid sodium (b) boron (c) graphite (d) carbon dioxide |
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Answer» Which of the following is used as a moderator in the reactor of a nuclear power station ? |
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| 16. |
An inductor-coil of inductance 20 mH having resistance of 10 Ω is joined to an ideal battery of emf 5 V. Find the emf induced across the inductor at t=0 s. |
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Answer» An inductor-coil of inductance 20 mH having resistance of 10 Ω is joined to an ideal battery of emf 5 V. Find the emf induced across the inductor at t=0 s. |
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| 17. |
Four cells each of EMF 2V and internal resistance 0.1Ω are connected in series. The combination is connected in series to an ammeter of negligible resistance, a 1.6Ω resistor and an unknown resistor R1. The current in the circuit is 2A. Draw a labelled circuit diagram for the arrangement and calculate the: (a) value of R1. (b) potential difference across R1 [5 MARKS] |
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Answer» Four cells each of EMF 2V and internal resistance 0.1Ω are connected in series. The combination is connected in series to an ammeter of negligible resistance, a 1.6Ω resistor and an unknown resistor R1. The current in the circuit is 2A. Draw a labelled circuit diagram for the arrangement and calculate the: (a) value of R1. (b) potential difference across R1 [5 MARKS] |
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| 18. |
The density of a planet is double that of the earth and the radius of it is 1.5 times that of the earth, if g is the acceleration due to gravity on the surface of earth then the acceleration due to gravity on the surface of the planet is |
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Answer» The density of a planet is double that of the earth and the radius of it is 1.5 times that of the earth, if g is the acceleration due to gravity on the surface of earth then the acceleration due to gravity on the surface of the planet is |
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| 19. |
how does the no. of turns of insulated coper wire per unit length make the change in the strength of magnetic field inside the solenoid ? |
| Answer» how does the no. of turns of insulated coper wire per unit length make the change in the strength of magnetic field inside the solenoid ? | |
| 20. |
a pipe closed at one end and open at the other end resonates witha sound of frequency 135hz and also with 165hz,but not at any other frequency intermediate between two,then the frequency of the fundamental note of the pipe is |
| Answer» a pipe closed at one end and open at the other end resonates witha sound of frequency 135hz and also with 165hz,but not at any other frequency intermediate between two,then the frequency of the fundamental note of the pipe is | |
| 21. |
Define the terms: a ray of light and a beam of light. |
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Answer» Define the terms: a ray of light and a beam of light. |
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| 22. |
Electrons with de Broglie wavelength fall on the target in an X - ray tube. The cut-off wavelength of the emitted X - rays is |
| Answer» Electrons with de Broglie wavelength fall on the target in an X - ray tube. The cut-off wavelength of the emitted X - rays is | |
| 23. |
If I stretch out a solenoid I get a straight wire. Both in solenoid and straight wire moving charges are producing magnetic field then why is magnetic field of a straight wire solenoid and a circular wire different shouldnt it be same in all? |
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Answer» If I stretch out a solenoid I get a straight wire. Both in solenoid and straight wire moving charges are producing magnetic field then why is magnetic field of a straight wire solenoid and a circular wire different shouldnt it be same in all? |
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| 24. |
The metallic bob of a simple pendulum of mass 0.5kg carries a positive charge of 0.25 C. If the pendulum is suspended in an electric field of strength 15 NC^{-1} directed from east to west, state the forces actingon the bob and derive the condition for equilibrium. Also find the angle subtended at the equilibrium.(Take g = 10 ms^{-2}) |
| Answer» The metallic bob of a simple pendulum of mass 0.5kg carries a positive charge of 0.25 C. If the pendulum is suspended in an electric field of strength 15 NC^{-1} directed from east to west, state the forces actingon the bob and derive the condition for equilibrium. Also find the angle subtended at the equilibrium.(Take g = 10 ms^{-2}) | |
| 25. |
20) The plane faces of two identical plano-convex lenses, each having focal length of 40 cm, are placed against each other to form a usual convex lens. The distance from this lens at which an object must be placed to obtain a real, inverted image with magnification -1' is 2 40 cnm (4) 160 cm 80 cm (3) 20 cm |
| Answer» 20) The plane faces of two identical plano-convex lenses, each having focal length of 40 cm, are placed against each other to form a usual convex lens. The distance from this lens at which an object must be placed to obtain a real, inverted image with magnification -1' is 2 40 cnm (4) 160 cm 80 cm (3) 20 cm | |
| 26. |
A thin long wire carrying current I is placed along positive X Asia .The unit vector of magnetic field at a point (0,a,a) |
| Answer» A thin long wire carrying current I is placed along positive X Asia .The unit vector of magnetic field at a point (0,a,a) | |
| 27. |
How to solve cube circuit resistance |
| Answer» How to solve cube circuit resistance | |
| 28. |
what is the energy density of electric field at a distance of 5m from a point source of EMwave if the electric field strength at that point be 100v/m |
| Answer» what is the energy density of electric field at a distance of 5m from a point source of EMwave if the electric field strength at that point be 100v/m | |
| 29. |
How do I understand image formed by Thick plane mirrors? |
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Answer» How do I understand image formed by Thick plane mirrors? |
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| 30. |
What is an electric meter? Where is it fixed in our house? |
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Answer» What is an electric meter? Where is it fixed in our house? |
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| 31. |
Point P is →r away from O and a force →F is applied at P as shown. What can be said about →T of →F about O ? |
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Answer» Point P is →r away from O and a force →F is applied at P as shown. What can be said about →T of →F about O ?
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| 32. |
Name some of the solar energy devices. |
| Answer» Name some of the solar energy devices. | |
| 33. |
ntA car of mass m is moving on a level circular track of radius R.Its coeffecient of static friction between road and tyres of car is represented by (meu)s , the maximum speed of carin circular motion is given byn |
| Answer» ntA car of mass m is moving on a level circular track of radius R.Its coeffecient of static friction between road and tyres of car is represented by (meu)s , the maximum speed of carin circular motion is given byn | |
| 34. |
Which of the above optical systems (given that all surfaces are made of transparent glass and the bold surfaces represent mirrors) can be considered as lenses? |
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Answer»
Which of the above optical systems (given that all surfaces are made of transparent glass and the bold surfaces represent mirrors) can be considered as lenses? |
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| 35. |
A body of mass 10 kg mass is moving with a velocity of 15 metre per second . When a adore is applied on it , it's velocity becomes 30 metre per second after 10 sec. Calculate the applied force. |
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Answer» A body of mass 10 kg mass is moving with a velocity of 15 metre per second . When a adore is applied on it , it's velocity becomes 30 metre per second after 10 sec. Calculate the applied force. |
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| 36. |
What traditional practice had to be stopped in order to protect the fresh grown grass at the time the great Himalayan National Park was formed? |
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Answer» What traditional practice had to be stopped in order to protect the fresh grown grass at the time the great Himalayan National Park was formed? |
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| 37. |
A 0.5 kg ball is thrown up with an initial speed 14m per sec. And reaches a max. Height of 8 m. How much energy is dissipated by air drag acting on the ball during the ascent? |
| Answer» A 0.5 kg ball is thrown up with an initial speed 14m per sec. And reaches a max. Height of 8 m. How much energy is dissipated by air drag acting on the ball during the ascent? | |
| 38. |
Question 1:(i) What are natural resources? Give examples.(ii) What are the types of natural resources. |
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Answer» Question 1: (i) What are natural resources? Give examples. (ii) What are the types of natural resources. |
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| 39. |
What is current divider rule? |
| Answer» What is current divider rule? | |
| 40. |
ntan electron of mass m with an initial vel. V=Vo i (vo>0) is in an electric field E= -Eo i ( Eo=constant>0) its debrogile wavelength at time t is given byn nt1) λo/(1+eEo/m. t/Vo)n nt2)λo(1+eEot/mVo)n nt3)λon nt4)λotn |
| Answer» ntan electron of mass m with an initial vel. V=Vo i (vo>0) is in an electric field E= -Eo i ( Eo=constant>0) its debrogile wavelength at time t is given byn nt1) λo/(1+eEo/m. t/Vo)n nt2)λo(1+eEot/mVo)n nt3)λon nt4)λotn | |
| 41. |
Consider the circuit shown below:then, which of the following statement is true |
Answer» Consider the circuit shown below: then, which of the following statement is true |
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| 42. |
A teacher gives a convex lens and a concave mirror of focal length of about 20 cm each to his student and ask him to find their focal lengths by obtaining the image of a distant object. The student uses a distant tree as the object and obtains its sharp image, one by one, on a screen. The distance d1 and d2 between the lens/mirror and the screen in the two cases and the nature of their respective sharp images are likely to be:(1) (20 cm, 40 cm) and (erect, erect)(2) (20 cm, 40 cm) and (inverted, erect)(3) (20 cm, 20 cm) and (inverted, inverted)(4) (20 cm, 20 cm) and (erect, inverted) |
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Answer» A teacher gives a convex lens and a concave mirror of focal length of about 20 cm each to his student and ask him to find their focal lengths by obtaining the image of a distant object. The student uses a distant tree as the object and obtains its sharp image, one by one, on a screen. The distance d1 and d2 between the lens/mirror and the screen in the two cases and the nature of their respective sharp images are likely to be: (1) (20 cm, 40 cm) and (erect, erect) (2) (20 cm, 40 cm) and (inverted, erect) (3) (20 cm, 20 cm) and (inverted, inverted) (4) (20 cm, 20 cm) and (erect, inverted) |
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| 43. |
What is the formula for linear magnification for lens? v = Image distance u = Object distance |
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Answer» What is the formula for linear magnification for lens? v = Image distance u = Object distance |
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| 44. |
An object is thrown vertically upward with a velocity of 10 ms−1 from the ground. It strikes the ground after____ seconds. (Take g=10 ms−2) |
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Answer» An object is thrown vertically upward with a velocity of 10 ms−1 from the ground. It strikes the ground after____ seconds. (Take g=10 ms−2) |
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| 45. |
In which direction should force be applied, in order to stop a trolley moving downward on the frictionless staircase? |
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Answer» In which direction should force be applied, in order to stop a trolley moving downward on the frictionless staircase?
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| 46. |
What is the molecular mass of the element which is the greenhouse gas produced by coal and petroleum and also exhaled by animals? |
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Answer» What is the molecular mass of the element which is the greenhouse gas produced by coal and petroleum and also exhaled by animals? |
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| 47. |
59. A ray of light passes from air into a liquid and the angle of incidence is 60.if the deviation produce is 7 then refractive index of the liquid is |
| Answer» 59. A ray of light passes from air into a liquid and the angle of incidence is 60.if the deviation produce is 7 then refractive index of the liquid is | |
| 48. |
10. Calculate wavelength associated with cricket ball of mass=150g, travelling with velocity of 25m/s. |
| Answer» 10. Calculate wavelength associated with cricket ball of mass=150g, travelling with velocity of 25m/s. | |
| 49. |
12.Dimensions of a block are 1 cm 1 cm 100 cm. If specific resistance of its material is 3 10–7 ohm-m, then the resistance between it’s opposite rectangular faces is [MP PET 1993] (a) 3 10–9 ohm (b) 3 10–7 ohm (c) 3 10–5 ohm (d) 3 10–3 ohm |
| Answer» 12.Dimensions of a block are 1 cm 1 cm 100 cm. If specific resistance of its material is 3 10–7 ohm-m, then the resistance between it’s opposite rectangular faces is [MP PET 1993] (a) 3 10–9 ohm (b) 3 10–7 ohm (c) 3 10–5 ohm (d) 3 10–3 ohm | |
| 50. |
Two resistors of resistances 4 Ω each are connected in series. Find the equivalent resistance of the circuit. |
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Answer» Two resistors of resistances 4 Ω each are connected in series. Find the equivalent resistance of the circuit. |
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