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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.
| 7351. |
Question 4A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 ms−2 for 8.0 s. How far does the boat travel during this time? |
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Answer» Question 4 A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 ms−2 for 8.0 s. How far does the boat travel during this time? |
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| 7352. |
Q. निम्नलिखित कथनों पर विचार कीजिए :1. प्रस्तावना में एकता के साथ अखंडता शब्द 44वें सविधान संशोधन द्वारा जोड़ा गया। 2. प्रस्तावना संविधान के प्रारंभ में दिया गया है परंतु यह सभा द्वारा सबसे अंत में पारित किया गया। नीचे दिए गए कूटों का प्रयोग कर सही उत्तर का चयन कीजिए: |
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Answer» Q. निम्नलिखित कथनों पर विचार कीजिए : 1. प्रस्तावना में एकता के साथ अखंडता शब्द 44वें सविधान संशोधन द्वारा जोड़ा गया। 2. प्रस्तावना संविधान के प्रारंभ में दिया गया है परंतु यह सभा द्वारा सबसे अंत में पारित किया गया। नीचे दिए गए कूटों का प्रयोग कर सही उत्तर का चयन कीजिए: |
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| 7353. |
Two-point charges Q1 and Q2 are 3 m apart and their combined charge is 20 μC. If one repels the other with force of 0.075 N. Calculate the two charges. (in μC) |
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Answer» Two-point charges Q1 and Q2 are 3 m apart and their combined charge is 20 μC. If one repels the other with force of 0.075 N. Calculate the two charges. (in μC) |
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| 7354. |
When brakes are applied to a bus, the retardation produced is 25 cm s−2 and the bus takes 20 s to stop.Calculate:(i) the initial velocity of bus,and (ii) the distance travelled by bus during this time. |
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Answer» When brakes are applied to a bus, the retardation produced is 25 cm s−2 and the bus takes 20 s to stop.Calculate:(i) the initial velocity of bus,and (ii) the distance travelled by bus during this time. |
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| 7355. |
The sound which is produced due to a mixture of several frequencies is called |
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Answer» The sound which is produced due to a mixture of several frequencies is called
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| 7356. |
Inside a fixed sphere of radius R and uniform density ρ, there is spherical cavity of radius R2 such that surface of the cavity passes through the centre of the sphere as shown in figure. A particle of mass m is released from rest at centre B of the cavity. Calculate velocity with which particle strikes the centre of the sphere. Neglect earth's gravity. Initially sphere and particle are at rest. |
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Answer» Inside a fixed sphere of radius R and uniform density ρ, there is spherical cavity of radius R2 such that surface of the cavity passes through the centre of the sphere as shown in figure. A particle of mass m is released from rest at centre B of the cavity. Calculate velocity with which particle strikes the centre of the sphere. Neglect earth's gravity. Initially sphere and particle are at rest. |
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| 7357. |
Explain susceptibility and retentivity.A student was given a random strip of a metal that is to be made into a magnet.Explain the properties of the metal strip in terms of magnetic susceptibility and retentivity, if it to be made into a: Temporary magnet Permanent magnet |
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Answer» Explain susceptibility and retentivity. A student was given a random strip of a metal that is to be made into a magnet. Explain the properties of the metal strip in terms of magnetic susceptibility and retentivity, if it to be made into a:
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| 7358. |
In an NPN transistor 1010 electrons enter the emitter in 10−6 s. If 2% of the electrons are lost in the base. The current transfer ratio of the transistor 98n. The value of n is .(integer only) |
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Answer» In an NPN transistor 1010 electrons enter the emitter in 10−6 s. If 2% of the electrons are lost in the base. The current transfer ratio of the transistor 98n. The value of n is |
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| 7359. |
Why the material medium must have inertia to hold some amount of energy?? 2 marks |
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Answer» Why the material medium must have inertia to hold some amount of energy?? 2 marks |
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| 7360. |
Mass remaining constant , the radius of earth shrinks by 1%. The acceleration due to gravity on the earth's surface would(a) increase by 2%(b) increase by 1%(c) decrease by 1%(d) decrease by 1/2% |
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Answer» Mass remaining constant , the radius of earth shrinks by 1%. The acceleration due to gravity on the earth's surface would (a) increase by 2% (b) increase by 1% (c) decrease by 1% (d) decrease by 1/2% |
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| 7361. |
How can you see the hair at the back of your head?Can the reflected rays be further reflected if incident on another mirror? |
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Answer» How can you see the hair at the back of your head?Can the reflected rays be further reflected if incident on another mirror? |
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| 7362. |
An object is placed at a distance of 30 cm from a convex mirror. The distance of the image formed is 10 cm from the mirror. Calculate the focal length of the mirror. |
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Answer» An object is placed at a distance of 30 cm from a convex mirror. The distance of the image formed is 10 cm from the mirror. Calculate the focal length of the mirror. |
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| 7363. |
What name is given to the speed in a specified direction? |
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Answer» What name is given to the speed in a specified direction? |
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| 7364. |
why focal lenght of concave mirror and concave lens is '-' (negative) |
| Answer» why focal lenght of concave mirror and concave lens is '-' (negative) | |
| 7365. |
Write true or false for each statement: (a) A coolie does not work against the force of gravity while carrying a luggage on a plane road. (b) The energy stored in water of a dam is kinetic energy. (c) The energy of a flying kite is kinetic energy. (d) Work done by a boy depends on the time in which he does work. (e) Power spent by a bosy depends on the time for which it does work. |
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Answer» Write true or false for each statement: (a) A coolie does not work against the force of gravity while carrying a luggage on a plane road. (b) The energy stored in water of a dam is kinetic energy. (c) The energy of a flying kite is kinetic energy. (d) Work done by a boy depends on the time in which he does work. (e) Power spent by a bosy depends on the time for which it does work. |
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| 7366. |
Question 5A driver of a car travelling at 52 kmph applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 seconds. Another driver going at 3 kmph in another car applies his brakes slowly and stops in 10 seconds. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied? |
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Answer» Question 5 A driver of a car travelling at 52 kmph applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 seconds. Another driver going at 3 kmph in another car applies his brakes slowly and stops in 10 seconds. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied? |
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| 7367. |
A satellite is orbiting earth at a distance of 42000 km in a circular orbit. It completes one revolution in 24 hours. Calculate its linear speed. |
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Answer» A satellite is orbiting earth at a distance of 42000 km in a circular orbit. It completes one revolution in 24 hours. Calculate its linear speed. |
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| 7368. |
In a car race? Car A takes 5sec less than carB and passes the end point of race with velocity v more than the velocity with which car B passes the point.if acceleration of car A and B are 9 and 4 then time in which car B complete the race |
| Answer» In a car race? Car A takes 5sec less than carB and passes the end point of race with velocity v more than the velocity with which car B passes the point.if acceleration of car A and B are 9 and 4 then time in which car B complete the race | |
| 7369. |
What is the equivalent resistance between A and B? |
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Answer» What is the equivalent resistance between A and B? |
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| 7370. |
A hydrogen atom and a Li++ ion are both in second excited state. If lH and lLi are their respective electronic angular momenta, and EH and ELi their respective energies, then (IIT-JEE-2002) |
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Answer» A hydrogen atom and a Li++ ion are both in second excited state. If lH and lLi are their respective electronic angular momenta, and EH and ELi their respective energies, then
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| 7371. |
Sir/ma'am A cork is heavier than needle but when a needle is placed in water it sinks but whereas a cork dosen't sink why? As the needle is lighter it should be also floating right. |
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Answer» Sir/ma'am A cork is heavier than needle but when a needle is placed in water it sinks but whereas a cork dosen't sink why? As the needle is lighter it should be also floating right. |
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| 7372. |
The following graph shows the change of a car's speed with time. How far did the car travel (in m) before it reached a constant speed?100 |
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Answer» The following graph shows the change of a car's speed with time. How far did the car travel (in m) before it reached a constant speed?
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| 7373. |
A car of mass m has an engine which can deliver power P.The minimum time in which car can be accelerated form rest is? |
| Answer» A car of mass m has an engine which can deliver power P.The minimum time in which car can be accelerated form rest is? | |
| 7374. |
80.A particle is moving in xy plane with constant speed v, such that its position r from origin varies as r=k(1+sinθ), where k is constant andθ is the angle made by position vector with positive x axis, then what is the angular speed and velocity of separation of particle from origin? |
| Answer» 80.A particle is moving in xy plane with constant speed v, such that its position r from origin varies as r=k(1+sinθ), where k is constant andθ is the angle made by position vector with positive x axis, then what is the angular speed and velocity of separation of particle from origin? | |
| 7375. |
nta car travels half of the distance with constant velocity 40km/hr and another half with a constant velocity of 60km/hr along a straight line. find the average velocity of the carn |
| Answer» nta car travels half of the distance with constant velocity 40km/hr and another half with a constant velocity of 60km/hr along a straight line. find the average velocity of the carn | |
| 7376. |
Calculate work done on a body whirling on a circular path of radius 5 m |
| Answer» Calculate work done on a body whirling on a circular path of radius 5 m | |
| 7377. |
A sphere of radius 5 cm is immersed in water filled in a cylinder, the level of water rises 53 cm. Find the radius of the cylinder. |
| Answer» A sphere of radius 5 cm is immersed in water filled in a cylinder, the level of water rises cm. Find the radius of the cylinder. | |
| 7378. |
A nichrome wire has a resistance of 10 Ω. Find the resistance of another nichrome wire, whose length is three times and area of cross-section is four times the first wire. |
| Answer» A nichrome wire has a resistance of 10 Ω. Find the resistance of another nichrome wire, whose length is three times and area of cross-section is four times the first wire. | |
| 7379. |
A planet has twice the mass of Earth and of identical size .what will be the height above the surface of the planet where it's acceleration due to gravity reduces by 36percent of it's value on it's surface |
| Answer» A planet has twice the mass of Earth and of identical size .what will be the height above the surface of the planet where it's acceleration due to gravity reduces by 36percent of it's value on it's surface | |
| 7380. |
Identify the graph type and calculate speed from the graph. |
Answer» Identify the graph type and calculate speed from the graph. |
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| 7381. |
Body A is half immersed in the water. If another body with same dimentions is placed on body A, then what will be the density of body B (ρB) when the system is fully immersed in the water. The density of water is ρw. |
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Answer» Body A is half immersed in the water. If another body with same dimentions is placed on body A, then what will be the density of body B (ρB) when the system is fully immersed in the water. |
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| 7382. |
Find mutual inductance if we have a square loop of side r instead of a small circular loop of side r at the centre of bigger circular loop. |
| Answer» Find mutual inductance if we have a square loop of side r instead of a small circular loop of side r at the centre of bigger circular loop. | |
| 7383. |
The length of two open organ pipes are l and (l+Δl) respectively . Neglecting end correction, the frequency of beats between them will be approximately(Here v is the speed of sound) |
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Answer» The length of two open organ pipes are l and (l+Δl) respectively . Neglecting end correction, the frequency of beats between them will be approximately |
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| 7384. |
Is rolling possible for an object on a friction less surface when external force is applied on it. |
| Answer» Is rolling possible for an object on a friction less surface when external force is applied on it. | |
| 7385. |
Is energy related to power or heat diaaipated |
| Answer» Is energy related to power or heat diaaipated | |
| 7386. |
Imagine you are walking towards a concave mirror from far away, explain the variations you observe in your image as you reach the pole. |
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Answer» Imagine you are walking towards a concave mirror from far away, explain the variations you observe in your image as you reach the pole. |
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| 7387. |
109.A train moving at a speed of 220 ms1 towards a stationary object, emits a sound of frequency 1000Hz. Some of the sound reaching the object gets reflected back to the train as echo. The frequency of the echo as detected by the driver of the train is :(speed of sound in air is 330 ms1) (1) 5000 Hz (2) 3000 Hz (3) 3500 Hz (4) 4000 Hz |
| Answer» 109.A train moving at a speed of 220 ms1 towards a stationary object, emits a sound of frequency 1000Hz. Some of the sound reaching the object gets reflected back to the train as echo. The frequency of the echo as detected by the driver of the train is :(speed of sound in air is 330 ms1) (1) 5000 Hz (2) 3000 Hz (3) 3500 Hz (4) 4000 Hz | |
| 7388. |
A nucleus of mass M and releases photons of frequency f . find the recoil energy of the nucleus ? |
| Answer» A nucleus of mass M and releases photons of frequency f . find the recoil energy of the nucleus ? | |
| 7389. |
Select the correct image of the given object when placed as shown. |
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Answer» Select the correct image of the given object when placed as shown. |
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| 7390. |
स्पीति के लोगों और मैदानी भागों में रहने वाले लोगों के जीवन की तुलना कीजिए। किन का जीवन आपको सबसे ज्यादा अच्छा लगता है और क्यों? |
| Answer» स्पीति के लोगों और मैदानी भागों में रहने वाले लोगों के जीवन की तुलना कीजिए। किन का जीवन आपको सबसे ज्यादा अच्छा लगता है और क्यों? | |
| 7391. |
A train is travelling at a speed of 90 km per hour. Brakes are applied so as to produce a uniform acceleration - 0.5 metres per second square. Find how far the train will go before it is brought to rest. |
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Answer» A train is travelling at a speed of 90 km per hour. Brakes are applied so as to produce a uniform acceleration - 0.5 metres per second square. Find how far the train will go before it is brought to rest. |
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| 7392. |
An alpha particle gets accelaterated by 10 to the power 4 volt in a uniform magnetic field 10 to the power 5 gauss. Find out the radius , time period and magnetic force. |
| Answer» An alpha particle gets accelaterated by 10 to the power 4 volt in a uniform magnetic field 10 to the power 5 gauss. Find out the radius , time period and magnetic force. | |
| 7393. |
In the above 3 figures, the arrows indicate the direction of force and magnitude of force is written above/below the arrows. Which box is experiencing balanced force? |
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Answer»
In the above 3 figures, the arrows indicate the direction of force and magnitude of force is written above/below the arrows. Which box is experiencing balanced force? |
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| 7394. |
44. A flat plate is moving normal to its plane through a gas under the action of a constant force F . The gas is kept at a very low pressure . The speed of plate v is much less than the average speed u of the gas molecules . Which of the following options is/are true? 1) at a later time the external force F balances the resistive force 2) the resistive force v experienced by the plate is proportional to v 3) the plate will continue to move with constant non-zero acceleration at all times 4) the pressure difference b/w the leading and trailing faces of the plate is proportional to uv |
| Answer» 44. A flat plate is moving normal to its plane through a gas under the action of a constant force F . The gas is kept at a very low pressure . The speed of plate v is much less than the average speed u of the gas molecules . Which of the following options is/are true? 1) at a later time the external force F balances the resistive force 2) the resistive force v experienced by the plate is proportional to v 3) the plate will continue to move with constant non-zero acceleration at all times 4) the pressure difference b/w the leading and trailing faces of the plate is proportional to uv | |
| 7395. |
In the figure Area 1 is equal to Area 2 . Time taken by the planet in moving from P1 to P2 is t1 and from P3 to P4 is t2. Relation between t1 and t2 is |
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Answer» In the figure Area 1 is equal to Area 2 . Time taken by the planet in moving from P1 to P2 is t1 and from P3 to P4 is t2. Relation between t1 and t2 is |
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| 7396. |
how does tension force exactly work? |
| Answer» how does tension force exactly work? | |
| 7397. |
The K.E. of a satellite in an orbit close to the surface of the earth is E. Its maximum K.E. to not escape from the gravitational field of the earth is |
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Answer» The K.E. of a satellite in an orbit close to the surface of the earth is E. Its maximum K.E. to not escape from the gravitational field of the earth is |
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| 7398. |
Name the two physical quantities which can be ibtaobta from velocity-time graph |
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Answer» Name the two physical quantities which can be ibtaobta from velocity-time graph |
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| 7399. |
84.Intensities of a sound as observed at a distance 5m and 10m from its source are in the ratio? |
| Answer» 84.Intensities of a sound as observed at a distance 5m and 10m from its source are in the ratio? | |
| 7400. |
147.A body of mass m is moving in a circular orbit of radius R about a planet of mass M. At some instant, it splits into two equal masses. The first mass moves in a circular orbit of radius R/2 , and the other mass, in a circular orbit of radius 3R/2. The difference between the final and initial total energiesis |
| Answer» 147.A body of mass m is moving in a circular orbit of radius R about a planet of mass M. At some instant, it splits into two equal masses. The first mass moves in a circular orbit of radius R/2 , and the other mass, in a circular orbit of radius 3R/2. The difference between the final and initial total energiesis | |
