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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
1.A rod of length L is pivoted at one end and is rotated with a uniform angular velocity in a horizontal plane let T1 and T2 be the tensions at the points L/4 and 3L/ 4 from the pivoted ends |
| Answer» 1.A rod of length L is pivoted at one end and is rotated with a uniform angular velocity in a horizontal plane let T1 and T2 be the tensions at the points L/4 and 3L/ 4 from the pivoted ends | |
| 502. |
What is the function of the switches in our homes? |
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Answer» What is the function of the switches in our homes? |
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| 503. |
A car weighing 1000 kg collides with a stationary 50 kg trolley, and imparts a velocity of 75 ms−1 to it. Find the speed with which the car was moving (Assume that the car comes to a stop after the collision and neglect friction at the time of collision). |
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Answer» A car weighing 1000 kg collides with a stationary 50 kg trolley, and imparts a velocity of 75 ms−1 to it. Find the speed with which the car was moving (Assume that the car comes to a stop after the collision and neglect friction at the time of collision). |
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| 504. |
Thermocol melts at ___ degree Celcius. |
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Answer» Thermocol melts at |
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| 505. |
A negatively charged rod is brought near an uncharged, grounded electroscope. Which of the following statements is true? |
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Answer» A negatively charged rod is brought near an uncharged, grounded electroscope. Which of the following statements is true? |
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| 506. |
A rod of length 10cm carries a charge of 50 microC distributed uniformly along its length. Find the magnitude of its electric field at a point 10cm from both the ends of the |
| Answer» A rod of length 10cm carries a charge of 50 microC distributed uniformly along its length. Find the magnitude of its electric field at a point 10cm from both the ends of the | |
| 507. |
Explain why, a glass rod can be charged by rubbing when held by hand but an iron rod cannot be charged by rubbing, if held by hand. |
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Answer» Explain why, a glass rod can be charged by rubbing when held by hand but an iron rod cannot be charged by rubbing, if held by hand. |
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| 508. |
When a light ray travels from medium 1 to 2, in which of the following cases it bends towards the normal? |
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Answer» When a light ray travels from medium 1 to 2, in which of the following cases it bends towards the normal? |
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| 509. |
What is light year? |
| Answer» What is light year? | |
| 510. |
Does Pluto have any moons? How many moons? |
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Answer» Does Pluto have any moons? How many moons? |
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| 511. |
What is the principal of electric motor |
| Answer» What is the principal of electric motor | |
| 512. |
THE PRESSURE EXERTED ON A TABLE WHEN A CUBE OF SIDE 10 CM AND MASS 5 KG IS KEPT ON IT WILL BE |
| Answer» THE PRESSURE EXERTED ON A TABLE WHEN A CUBE OF SIDE 10 CM AND MASS 5 KG IS KEPT ON IT WILL BE | |
| 513. |
Question 1 (b) Fill in the blank:Friction depends on the _________ of surfaces. |
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Answer» Question 1 (b) Fill in the blank: Friction depends on the _________ of surfaces. |
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| 514. |
Is it necessary to switch off laptop or tablet (electroninc but wireless divices) during thunderstorm? Is yes/no why? |
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Answer» Is it necessary to switch off laptop or tablet (electroninc but wireless divices) during thunderstorm? Is yes/no why? |
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| 515. |
A particle moving with speed v collides with another particle elastically with another particle at rest. when the first particle moves at an angle 30 degrees with the initial direction of motion, 2nd particle will move at angle (theta) with initial direction of motion of the 1st particle. Find the value of theta. |
| Answer» A particle moving with speed v collides with another particle elastically with another particle at rest. when the first particle moves at an angle 30 degrees with the initial direction of motion, 2nd particle will move at angle (theta) with initial direction of motion of the 1st particle. Find the value of theta. | |
| 516. |
A car start from rest ,move with an acceleration a and then decelerate at a constant rate b for sometime to come to rest . if the total time taken is t the max velocity of car is given by 1. abt/(a+b) 2. a square t / (a+b) 3. at /(a+b) 4. b square t /(a+b) |
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Answer» A car start from rest ,move with an acceleration a and then decelerate at a constant rate b for sometime to come to rest . if the total time taken is t the max velocity of car is given by 1. abt/(a+b) 2. a square t / (a+b) 3. at /(a+b) 4. b square t /(a+b) |
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| 517. |
How does air cushions reduce friction? |
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Answer» How does air cushions reduce friction? |
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| 518. |
Does the smoothness of the sliding surface affect friction? |
| Answer» Does the smoothness of the sliding surface affect friction? | |
| 519. |
√12+√12-√12+√12-√12 •••••••••••••• infinite |
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Answer» √12+√12-√12+√12-√12 •••••••••••••• infinite |
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| 520. |
Answer the following questions. (a) How many times is an image in a plane mirror bigger or smaller than the object? (b) Where is the image formed in a plane mirror located? (c) Explain the difference between regular and irregular reflection. (d) How many images are obtained in two parallel mirrors? (e) Why are the two mirrors in a periscope placed parallel to each other? |
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Answer» Answer the following questions. (a) How many times is an image in a plane mirror bigger or smaller than the object? (b) Where is the image formed in a plane mirror located? (c) Explain the difference between regular and irregular reflection. (d) How many images are obtained in two parallel mirrors? (e) Why are the two mirrors in a periscope placed parallel to each other? |
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| 521. |
In a house, 3 bulbs of 25 W each are used for five hours a day. Calculate the units of electricity consumed in 31 days. Also, find total expenditure if one unit costs rupees 2.50. |
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Answer» In a house, 3 bulbs of 25 W each are used for five hours a day. Calculate the units of electricity consumed in 31 days. Also, find total expenditure if one unit costs rupees 2.50. |
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| 522. |
Electric bell is an example of a/an _____________ |
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Answer» Electric bell is an example of a/an _____________ |
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| 523. |
Calculate the distance and displacement of a car when it completes three rounds of a circular track of Diamete 7m. |
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Answer» Calculate the distance and displacement of a car when it completes three rounds of a circular track of Diamete 7m. |
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| 524. |
If a book placed on a horizontal desk is pushed towards right, what will be the direction of frictional force acting on it? |
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Answer» If a book placed on a horizontal desk is pushed towards right, what will be the direction of frictional force acting on it? |
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| 525. |
What is the maximum displacement of an oscillating object is called?State its SI unit. |
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Answer» What is the maximum displacement of an oscillating object is called?State its SI unit. |
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| 526. |
Slope of graph of compressibility factor(Z) with pressure(P) for hydrogen gas at any pressure i |
| Answer» Slope of graph of compressibility factor(Z) with pressure(P) for hydrogen gas at any pressure i | |
| 527. |
Explain repulsion is the sure test of electrification? |
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Answer» Explain repulsion is the sure test of electrification? |
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| 528. |
Give one example where force changes the shape of an object. |
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Answer» Give one example where force changes the shape of an object. |
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| 529. |
An electric bulb is rated 220V and 100 W. When it is operated on 110V, the power consumed will be what? |
| Answer» An electric bulb is rated 220V and 100 W. When it is operated on 110V, the power consumed will be what? | |
| 530. |
Which circuit represents a series combination of resistors? i) ii) |
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Answer» Which circuit represents a series combination of resistors? |
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| 531. |
Choose the correct statements: |
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Answer» Choose the correct statements: |
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| 532. |
Which force do the animals apply while moving, chewing and doing other activities? |
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Answer» Which force do the animals apply while moving, chewing and doing other activities? |
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| 533. |
Question 13A magnetic compass needle is placed in the plane of paper near point A as shown in Figure. In which plane should a straight current carrying conductor be placed so that it passes through A and there is no change in the deflection of the compass? Under what condition is the deflection maximum and why? |
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Answer» Question 13 |
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| 534. |
A body of density p is dropped from rest fro a height h into a lake of density d ,where d>p.neglecting all dissipative forces ,the max. depth to which the body sinks before returning to float on surface h/d-p hp/d hp/d-p hd/d-p |
| Answer» A body of density p is dropped from rest fro a height h into a lake of density d ,where d>p.neglecting all dissipative forces ,the max. depth to which the body sinks before returning to float on surface h/d-p hp/d hp/d-p hd/d-p | |
| 535. |
The power of a concave lens is -0.6D. Find the far point of the eye. |
| Answer» The power of a concave lens is -0.6D. Find the far point of the eye. | |
| 536. |
why shouldn't we touch a charged object with our hand ? |
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Answer» why shouldn't we touch a charged object with our hand ? |
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| 537. |
What happens when a huge current flows through any object? Which type of material must be used for the lightning rod? [3 MARKS] |
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Answer» What happens when a huge current flows through any object? Which type of material must be used for the lightning rod? [3 MARKS] |
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| 538. |
In a lateral inversion : |
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Answer» In a lateral inversion : |
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| 539. |
If the speed of an object becomes comparable to that of light, then there would be a change of mass which must be occurring by gain/loss in electrons (since nucleons can't be lost) so won't there be a change in charge?? |
| Answer» If the speed of an object becomes comparable to that of light, then there would be a change of mass which must be occurring by gain/loss in electrons (since nucleons can't be lost) so won't there be a change in charge?? | |
| 540. |
Atmospheric pressure at a place is measured by a |
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Answer» Atmospheric pressure at a place is measured by a |
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| 541. |
Why we do not use capacitor made up of metal and capacitance of spherical shell is direct proportion to dielectric constant |
| Answer» Why we do not use capacitor made up of metal and capacitance of spherical shell is direct proportion to dielectric constant | |
| 542. |
The ratio of kinetic energy require to be given to escape from Earth surface to kinetic energy require to be given to the same satellite to revolve round the earth in an orbit just above earth surface is |
| Answer» The ratio of kinetic energy require to be given to escape from Earth surface to kinetic energy require to be given to the same satellite to revolve round the earth in an orbit just above earth surface is | |
| 543. |
5. Name three liquids, which when tested in the manner shown in Fig.14.9, may cause the magnetic needle to deflect. |
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Answer» 5. |
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| 544. |
A-If a metal sheet is introduced between two pointcharges, then force on each increases.AR On insertion of the metal between the chargesthe interaction force between the chargesdisappears |
| Answer» A-If a metal sheet is introduced between two pointcharges, then force on each increases.AR On insertion of the metal between the chargesthe interaction force between the chargesdisappears | |
| 545. |
How does waves transfer while speaking through microphone? |
| Answer» How does waves transfer while speaking through microphone? | |
| 546. |
8.The displacement of a particle at an instant is given to be y = rsin[ωt –θ ] Where r = amplitude, ω is angular velocity and θ is angle, the velocity and acceleration of particle is |
| Answer» 8.The displacement of a particle at an instant is given to be y = rsin[ωt –θ ] Where r = amplitude, ω is angular velocity and θ is angle, the velocity and acceleration of particle is | |
| 547. |
Why is the distance between stars and planets expressed in light years? |
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Answer» Why is the distance between stars and planets expressed in light years? |
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| 548. |
Raj was able to charge a plastic comb by rubbing his dry hair but not a metal. Why? |
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Answer» Raj was able to charge a plastic comb by rubbing his dry hair but not a metal. Why? |
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| 549. |
Suspend two plastic balls as shown in the figure. A glass rod is rubbed with silk to make it charged. One of the balls is touched with the glass rod and the other is touched with the silk.What can we observe? Give reason for the observation. [3 MARKS] |
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Answer» Suspend two plastic balls as shown in the figure. A glass rod is rubbed with silk to make it charged. One of the balls is touched with the glass rod and the other is touched with the silk.What can we observe? Give reason for the observation. [3 MARKS] |
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| 550. |
53. Four identical cells each having emf E and internal resistance r are connected in series to� form a loop ABCD as shown in the figure.Find potential difference across AB and AC |
| Answer» 53. Four identical cells each having emf E and internal resistance r are connected in series to� form a loop ABCD as shown in the figure.Find potential difference across AB and AC | |
Name three liquids, which when tested in the manner shown in Fig.14.9, may cause the magnetic needle to deflect.