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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. |
Two long conductors, separated by a distance ‘d’ carry current I1 and I2 in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to 3d. The value of the force between them is |
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Answer» Two long conductors, separated by a distance ‘d’ carry current I1 and I2 in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to 3d. The value of the force between them is |
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| 2. |
Assertion- Magnitude of average velocity is equal to average speed, if velocity is constant. Reason- If velocity is constant, then there is no change in direction of motion. |
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Answer» Assertion- Magnitude of average velocity is equal to average speed, if velocity is constant. Reason- If velocity is constant, then there is no change in direction of motion. |
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| 3. |
A PARTICLE EXECUTING SHM WITH ENERGY OF VIBRATION 90J AND a=6cm.WHEN THE PARTICLE REACHES AT DISTANCE 4cmFROM MEAN POSITION,IT IS STOPPED FOR A MOMENT AND THEN RELEASED.THE NEW ENERGY I |
| Answer» A PARTICLE EXECUTING SHM WITH ENERGY OF VIBRATION 90J AND a=6cm.WHEN THE PARTICLE REACHES AT DISTANCE 4cmFROM MEAN POSITION,IT IS STOPPED FOR A MOMENT AND THEN RELEASED.THE NEW ENERGY I | |
| 4. |
Two bulbs are marked as ‘A’ having rating 60W, 220V & ‘B’ having rating 100W, 220V. They are connected in parallel to a 220 V source. Which of the two will glow brighter? |
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Answer» Two bulbs are marked as ‘A’ having rating 60W, 220V & ‘B’ having rating 100W, 220V. They are connected in parallel to a 220 V source. Which of the two will glow brighter? |
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| 5. |
Which of the following are the necessary and sufficient conditions for a body to have some angular acceleration about a fixed Axis? |
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Answer» Which of the following are the necessary and sufficient conditions for a body to have some angular acceleration about a fixed Axis? |
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| 6. |
A particle is moving in a straight line whose velocity varies with position as v=3x square - 10, then acceleration of the particle is |
| Answer» A particle is moving in a straight line whose velocity varies with position as v=3x square - 10, then acceleration of the particle is | |
| 7. |
131.A magnetized wire of momement 3.14 A-m is bent in the form of a semicircle;then the new magnetic moment will be( in A-m):- 1)3.14 2)2 3)6.28 4)None of these |
| Answer» 131.A magnetized wire of momement 3.14 A-m is bent in the form of a semicircle;then the new magnetic moment will be( in A-m):- 1)3.14 2)2 3)6.28 4)None of these | |
| 8. |
79.A metal rod of length l and mass m is pivoted at one of its ends. A thin disc of mass M and radius R( |
| Answer» 79.A metal rod of length l and mass m is pivoted at one of its ends. A thin disc of mass M and radius R( | |
| 9. |
A ball falls on the ground from a height H1 and rebound to a height H2. Then fractional loss in its kinetic energy during collision with the ground |
| Answer» A ball falls on the ground from a height H1 and rebound to a height H2. Then fractional loss in its kinetic energy during collision with the ground | |
| 10. |
A small electric dipole of dipole moment P is placed at a distance r from one infinitely long uniformly charged, straight conductor. If lambda is the linear charge density of straight conductor and axis of the dipole is perpendicular to the straight conductor then the force acting on the dipole is |
| Answer» A small electric dipole of dipole moment P is placed at a distance r from one infinitely long uniformly charged, straight conductor. If lambda is the linear charge density of straight conductor and axis of the dipole is perpendicular to the straight conductor then the force acting on the dipole is | |
| 11. |
A hemispherical bowl just floats without sinking in a liquid of density 1.2×103 kg/m3. If the outer diameter and the density of the bowl are 1 m and 2×104 kg/m3 respectively, then the inner diameter of the bowl will be (in m) [Answer upto two decimal places] |
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Answer» A hemispherical bowl just floats without sinking in a liquid of density 1.2×103 kg/m3. If the outer diameter and the density of the bowl are 1 m and 2×104 kg/m3 respectively, then the inner diameter of the bowl will be (in m) [Answer upto two decimal places] |
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| 12. |
Two masses 5 g and 10 g are placed along x− axis as shown in the figure. Then, the distance of the COM of the two particle system from the 5 g mass is |
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Answer» Two masses 5 g and 10 g are placed along x− axis as shown in the figure. Then, the distance of the COM of the two particle system from the 5 g mass is |
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| 13. |
Two charges each of 1 colulomb are at a distance 1 km apart, the force between them is |
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Answer» Two charges each of 1 colulomb are at a distance 1 km apart, the force between them is |
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| 14. |
A boat is moving with a velocity 3^i+4^j with respect to ground. The water in the river is moving with a velocity −3^i−4^j with respect to ground. The relative velocity of the boat with respect to water is |
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Answer» A boat is moving with a velocity 3^i+4^j with respect to ground. The water in the river is moving with a velocity −3^i−4^j with respect to ground. The relative velocity of the boat with respect to water is |
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| 15. |
Q: what is instantaneous velocity, instantaneous acceleration, instantaneous power ? |
| Answer» Q: what is instantaneous velocity, instantaneous acceleration, instantaneous power ? | |
| 16. |
There is a non conducting sphere of radius R which is uniformly charged if a smaller concentric sphere of radius R by 2 is removed then the electric field inside the cavity is |
| Answer» There is a non conducting sphere of radius R which is uniformly charged if a smaller concentric sphere of radius R by 2 is removed then the electric field inside the cavity is | |
| 17. |
The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 ˙A. The wavelength of the second spectral line in the Balmer series of single ionized helium atom is ____ ˙A. |
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Answer» The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 ˙A. The wavelength of the second spectral line in the Balmer series of single ionized helium atom is ____ ˙A. |
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| 18. |
An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The maximum and minimum diameters of the pipes are 6.4 cm and 4.8 cm, respectively. The ratio of the minimum and maximum velocities of fluid in this pipe is: |
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Answer» An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The maximum and minimum diameters of the pipes are 6.4 cm and 4.8 cm, respectively. The ratio of the minimum and maximum velocities of fluid in this pipe is: |
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| 19. |
A beam of light having wavelength distributed uniformly between 450 nm to 550 nm passes through a sample of hydrogen gas. Which wavelength will have the least intensity in the transmitted beam? |
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Answer» A beam of light having wavelength distributed uniformly between 450 nm to 550 nm passes through a sample of hydrogen gas. Which wavelength will have the least intensity in the transmitted beam? |
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| 20. |
Two objects that are moving along an xy-plane on a frictionless floor collide. Assume that they form a closed, isolated system. The following table gives some of the momentum components (in kilogram meters per second) before and after the collision. Find the missing values (A, B): Before collisionAfter collisionObjectPx∣PyPx∣PyA−4∣ 53 ∣ABB ∣−24∣2 |
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Answer» Two objects that are moving along an xy-plane on a frictionless floor collide. Assume that they form a closed, isolated system. The following table gives some of the momentum components (in kilogram meters per second) before and after the collision. Find the missing values (A, B): |
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| 21. |
If a→, b→, c→ are three vectors such that a→, b→, c→=10, then a→+b→ b→+c→ c→+a→ = _______________. |
| Answer» If are three vectors such that = _______________. | |
| 22. |
31.A simple pendulum of length l and bob ofmass m is hanging in front of a large nonconducting sheet having surface charge density p.if suddenly a charge +q is given to thebob and it is released from themeanposition.find the maximum angle thru which the string is deflected |
| Answer» 31.A simple pendulum of length l and bob ofmass m is hanging in front of a large nonconducting sheet having surface charge density p.if suddenly a charge +q is given to thebob and it is released from themeanposition.find the maximum angle thru which the string is deflected | |
| 23. |
The energy of a gas per litre is 300 joules, then its pressure will be |
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Answer» The energy of a gas per litre is 300 joules, then its pressure will be |
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| 24. |
Angular velocity of the particle becomes four times of its initial angular velocity in two seconds if initial angular velocity of a particle is 4RAD per second then average angular acceleration of particle is |
| Answer» Angular velocity of the particle becomes four times of its initial angular velocity in two seconds if initial angular velocity of a particle is 4RAD per second then average angular acceleration of particle is | |
| 25. |
How to find whether springs are connected in series or parallel? |
| Answer» How to find whether springs are connected in series or parallel? | |
| 26. |
An AC circuit consists of a 220 Ω resistance and a 0.7 H choke in series. Find the power absorbed from 220 V and 50 Hz source connected in series with the circuit elements |
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Answer» An AC circuit consists of a 220 Ω resistance and a 0.7 H choke in series. Find the power absorbed from 220 V and 50 Hz source connected in series with the circuit elements |
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| 27. |
Question 1In the figure, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?(a) Magnitude of force applied by A is greater than that of B.(b) Magnitude of force applied by A is smaller than that of B.(c) Net force on the block is towards A.(d) Magnitude of force applied by A is equal to that of B. |
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Answer» Question 1 In the figure, two boys A and B are shown applying force on a block. If the block moves towards the right, which one of the following statements is correct?  (a) Magnitude of force applied by A is greater than that of B. (b) Magnitude of force applied by A is smaller than that of B. (c) Net force on the block is towards A. (d) Magnitude of force applied by A is equal to that of B. |
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| 28. |
In a vernier calipers , one main scale division is x cm and n divisions of the vernier scale coincide with (n−1) divisions of main scale. The least count (in cm) of the caliper is: |
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Answer» In a vernier calipers , one main scale division is x cm and n divisions of the vernier scale coincide with (n−1) divisions of main scale. The least count (in cm) of the caliper is: |
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| 29. |
A grasshopper can jump maximum distance 1.6 m. It spends negligible time on the ground. How far can it go in 10 seconds. |
Answer» A grasshopper can jump maximum distance 1.6 m. It spends negligible time on the ground. How far can it go in 10 seconds. |
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| 30. |
What is mechanical energy for a body having escape velocity. Explain |
| Answer» What is mechanical energy for a body having escape velocity. Explain | |
| 31. |
Select the incorrect statement about liquid junction potential. |
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Answer» Select the incorrect statement about liquid junction potential. |
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| 32. |
The electric potential existing in spac is V(x,y,z,) = A (xy + yz +zx). (a) write the dimensional formula of A. (b) Find hte expression fr the electric field . (c) if A is 10 SI units, find the magnitude of the field at (1m, 1m, 1m) |
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Answer» The electric potential existing in spac is V(x,y,z,) = A (xy + yz +zx). (a) write the dimensional formula of A. (b) Find hte expression fr the electric field . (c) if A is 10 SI units, find the magnitude of the field at (1m, 1m, 1m) |
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| 33. |
Two projectiles are fired from the two imaginary planets A and B. The projectile is fired from the planet A with a velocity of 10 m/s and at angle θ with horizontal. Another projectile is fired from the surface of planet B with a velocity of 6 m/s at the same angle follows trajectory which is identical with the trajectory of projectile from planet A. What is the ratio of the acceleration due to gravity of planet A to planet B? |
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Answer» Two projectiles are fired from the two imaginary planets A and B. The projectile is fired from the planet A with a velocity of 10 m/s and at angle θ with horizontal. Another projectile is fired from the surface of planet B with a velocity of 6 m/s at the same angle follows trajectory which is identical with the trajectory of projectile from planet A. What is the ratio of the acceleration due to gravity of planet A to planet B? |
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| 34. |
A particle of mass 2 kg is moving with a uniform speed of 10 m/s in x−y plane along the line x=6 m. Find the magnitude of the angular momentum of the particle about the origin. |
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Answer» A particle of mass 2 kg is moving with a uniform speed of 10 m/s in x−y plane along the line x=6 m. Find the magnitude of the angular momentum of the particle about the origin. |
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| 35. |
A vector which bisects the angle between →a=3^i−4^k and →b=5^j+12^k is: |
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Answer» A vector which bisects the angle between |
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| 36. |
A car with an initial velocity of 30km/h begins to accelerate constantly and attains a speed of 60km/h in 5seconds. What is the acceleration of the car? |
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Answer» A car with an initial velocity of 30km/h begins to accelerate constantly and attains a speed of 60km/h in 5seconds. What is the acceleration of the car? |
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| 37. |
A particle is moving along a circular path with uniform speed. Through what angle does its angular velocity change when it completes half of the circular path? |
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Answer» A particle is moving along a circular path with uniform speed. Through what angle does its angular velocity change when it completes half of the circular path? |
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| 38. |
22. A ring of radius R is charged uniformly with a charge+Q. The electric field at a point on its axis at adistance r from any point on the ring will beKQ(r2-R2)KQ(2 2KQrKo-e) NO |
| Answer» 22. A ring of radius R is charged uniformly with a charge+Q. The electric field at a point on its axis at adistance r from any point on the ring will beKQ(r2-R2)KQ(2 2KQrKo-e) NO | |
| 39. |
a battery supplies a current of 0.9A through a 2.0 ohm resister and a current of 0.3A through a 7.0 ohm resister .calculate the emf and the internal resistance of the battery . |
| Answer» a battery supplies a current of 0.9A through a 2.0 ohm resister and a current of 0.3A through a 7.0 ohm resister .calculate the emf and the internal resistance of the battery . | |
| 40. |
A metal ball weighs 0.096 N in air. If suspended in water, it has an apparent weight of 0.071 N. The density of the metal ball is |
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Answer» A metal ball weighs 0.096 N in air. If suspended in water, it has an apparent weight of 0.071 N. The density of the metal ball is |
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| 41. |
A ball of mass m is thrown vertically upwards another ball of mass 2m is thrown at an angle theta with the vertical both of them stay in air for same period of time the heights attained by the two balls are in the ratio of |
| Answer» A ball of mass m is thrown vertically upwards another ball of mass 2m is thrown at an angle theta with the vertical both of them stay in air for same period of time the heights attained by the two balls are in the ratio of | |
| 42. |
Q. A Body of mass 1 kg is attached to one end of a wire and rotated in a horizontal circle of diameter 40cm with a cons†an t speed of 2m/s. what is the area of cross section of wire. if the stress developed in the wire is 5\ast10^6 N/m^2. |
| Answer» Q. A Body of mass 1 kg is attached to one end of a wire and rotated in a horizontal circle of diameter 40cm with a cons†an t speed of 2m/s. what is the area of cross section of wire. if the stress developed in the wire is 5\ast10^6 N/m^2. | |
| 43. |
If in a pn junction diode, a square input signal of 10 V is applied as shown,then the output signal across R1 will be |
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Answer» If in a pn junction diode, a square input signal of 10 V is applied as shown, |
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| 44. |
Pick out the statement which is incorrect. |
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Answer» Pick out the statement which is incorrect. |
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| 45. |
A 10kg block is kept on a horizontal surface and Ram is trying to pull it with a force of 5N, Given coefficient of static friction is 0.2 and coefficient of Kinetic friction n(μK) = 0.1 Which of these statements is/are correct. |
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Answer» A 10kg block is kept on a horizontal surface and Ram is trying to pull it with a force of 5N, Given coefficient of static friction is 0.2 and coefficient of Kinetic friction n(μK) = 0.1 Which of these statements is/are correct. |
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| 46. |
What is the average speed and average velocity till t = 20s? |
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Answer»
What is the average speed and average velocity till t = 20s? |
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| 47. |
what is the law of mass action |
| Answer» what is the law of mass action | |
| 48. |
If the force on a rocket, moving with a velocity 500 m/s is 400 N, the rate of combustion of the fuel will be: |
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Answer» If the force on a rocket, moving with a velocity 500 m/s is 400 N, the rate of combustion of the fuel will be: |
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| 49. |
ntThe amount of heat energy required to raise the temperature of 1 g of helium at NTP, from T1 K to T2 K?n |
| Answer» ntThe amount of heat energy required to raise the temperature of 1 g of helium at NTP, from T1 K to T2 K?n | |
| 50. |
an electric dipole is placed at an angle 60^{0 }with an electric field of strength 4×10^{5 }N/C. it experiences a torque equal to 8\sqrt3 Nm. calculate the charge on the dipole, if dipoleis of length 4cm (1) 10^{-1 }C (2)10^{-2} C (3)10^{-3 }C (4) 10^{-4} |
| Answer» an electric dipole is placed at an angle 60^{0 }with an electric field of strength 4×10^{5 }N/C. it experiences a torque equal to 8\sqrt3 Nm. calculate the charge on the dipole, if dipoleis of length 4cm (1) 10^{-1 }C (2)10^{-2} C (3)10^{-3 }C (4) 10^{-4} | |
