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InterviewSolution
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.
| 6651. |
Light Reflection and Refraction5339. An object of height 6 cm is placed on the principalaxis of a concave mirror of focal length f at adistance of 4f. The length of the image will be(1) 2 cm(2) 12 cm |
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Answer» Light Reflection and Refraction53 39. An object of height 6 cm is placed on the principal axis of a concave mirror of focal length f at a distance of 4f. The length of the image will be (1) 2 cm (2) 12 cm |
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| 6652. |
When the sky is covered with dark clouds and it starts raining, have you ever listened to the patter of soft rain on the roof? What thoughts flashed through your mind as you heard this melody of nature? Read the poem to find out what the poet dreamed of while listening to the rain. |
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Answer» When the sky is covered with dark clouds and it starts raining, have you ever listened to the patter of soft rain on the roof? What thoughts flashed through your mind as you heard this melody of nature? Read the poem to find out what the poet dreamed of while listening to the rain. |
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| 6653. |
31.A point charge a is kept at the centre of a fixed semicircular thread having a uniform charge per unit length 'A' the radius of semicircular thread being R. The force required to keep the charge stationary is |
| Answer» 31.A point charge a is kept at the centre of a fixed semicircular thread having a uniform charge per unit length 'A' the radius of semicircular thread being R. The force required to keep the charge stationary is | |
| 6654. |
A car leaves the barrel of gun At a speed of 500 m/ s . The barrel is 2.0m long .the average acceleration of the shell is |
| Answer» A car leaves the barrel of gun At a speed of 500 m/ s . The barrel is 2.0m long .the average acceleration of the shell is | |
| 6655. |
Which of these is considered "work"? |
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Answer» Which of these is considered "work"? |
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| 6656. |
Q.20> Calculate electric and magnetic fields produced by the radiation coming from a 60 W bulb at a distance of 1m . Assume that the efficiency of the bulb is 50% and it radiates as a point source. |
| Answer» Q.20> Calculate electric and magnetic fields produced by the radiation coming from a 60 W bulb at a distance of 1m . Assume that the efficiency of the bulb is 50% and it radiates as a point source. | |
| 6657. |
if the constant of gravity g planck constant at and velocity of library see which is the fundamental unit what is the dimension of the radius of gyration? |
| Answer» if the constant of gravity g planck constant at and velocity of library see which is the fundamental unit what is the dimension of the radius of gyration? | |
| 6658. |
A particle is projected vertically upwards. The time corresponding to a location at height h while ascending and while descending are 3s and 5s respectively, then velocity of projection is g=10m/s^2 |
| Answer» A particle is projected vertically upwards. The time corresponding to a location at height h while ascending and while descending are 3s and 5s respectively, then velocity of projection is g=10m/s^2 | |
| 6659. |
24. A stone is dropped from top of a tower of height 45m. 1sec later another stone is thrown down from the top of the same tower. Both stones reach the ground at the same time. If g=10m/s2 , magnitude of the initial vel of the second stone is |
| Answer» 24. A stone is dropped from top of a tower of height 45m. 1sec later another stone is thrown down from the top of the same tower. Both stones reach the ground at the same time. If g=10m/s2 , magnitude of the initial vel of the second stone is | |
| 6660. |
Name the technique by which doctors can produce pictures showing insides of the human body. |
| Answer» Name the technique by which doctors can produce pictures showing insides of the human body. | |
| 6661. |
Uniform metre scale is balance that 40 cm mark when weight of 20 gf and 5 gf are suspended at 5 cm and 75 cm respectively. calculate the weight of metre scale |
| Answer» Uniform metre scale is balance that 40 cm mark when weight of 20 gf and 5 gf are suspended at 5 cm and 75 cm respectively. calculate the weight of metre scale | |
| 6662. |
The maximum vertical distance through which a full dressed astronaut can jump on the Earth is 0.5 m. Estimate the maximum vertical distance through which astronaut can jump on the Moon, which has a mean density (23)rd that of the earth and radius one quarter that of the earth. |
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Answer» The maximum vertical distance through which a full dressed astronaut can jump on the Earth is 0.5 m. Estimate the maximum vertical distance through which astronaut can jump on the Moon, which has a mean density (23)rd that of the earth and radius one quarter that of the earth. |
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| 6663. |
The moment of inertia of a thin uniform circular disc about one of its diameter is l. Its moment of inertia about an axis tangent to it and perpendicular to its plane is |
| Answer» The moment of inertia of a thin uniform circular disc about one of its diameter is l. Its moment of inertia about an axis tangent to it and perpendicular to its plane is | |
| 6664. |
The value of the universal gravitational constant is . |
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Answer» The value of the universal gravitational constant is |
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| 6665. |
a) A train 40m long passes over a bridge 200m long at a speed of 36km/hr. How long will it take to pass completely over the bridge b). A boy start running from his house with a uniform speed and takes 1hour to reach the playground is 3.6km. calculate the speed in km/hr,m/s,and cm/s C) which of the following is moving faster justify the answer 1)a scooter moving with a speed 300m/min 2) a car moving with a speed of 36km/he. |
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Answer» a) A train 40m long passes over a bridge 200m long at a speed of 36km/hr. How long will it take to pass completely over the bridge b). A boy start running from his house with a uniform speed and takes 1hour to reach the playground is 3.6km. calculate the speed in km/hr,m/s,and cm/s C) which of the following is moving faster justify the answer 1)a scooter moving with a speed 300m/min 2) a car moving with a speed of 36km/he. |
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| 6666. |
40.Why acceleration due to gravity is maximum at earth surface |
| Answer» 40.Why acceleration due to gravity is maximum at earth surface | |
| 6667. |
if time t energyE momentumM are as base quatites then dimension of mass |
| Answer» if time t energyE momentumM are as base quatites then dimension of mass | |
| 6668. |
Earth is considered to have its mass concentrated at its point centre then why does accn due to gravity decrease while we go deeper inside the earth? |
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Answer» Earth is considered to have its mass concentrated at its point centre then why does accn due to gravity decrease while we go deeper inside the earth? |
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| 6669. |
A speed of 100 km/h, expressed in cm s-1 |
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Answer» A speed of 100 km/h, expressed in cm s-1 |
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| 6670. |
What is the formula for instantaneous acceleration? |
| Answer» What is the formula for instantaneous acceleration? | |
| 6671. |
Which of the following velocity-mass graph is correct when linear momentum is constant?जब रेखीय संवेग नियत है, तब निम्नलिखित में से कौनसा वेग-द्रव्यमान आरेख सही है? |
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Answer» Which of the following velocity-mass graph is correct when linear momentum is constant? |
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| 6672. |
a girl stand at a distance of 170m in front of a high wall and claps. what will be the time interval when she hears its echo? [speed of sound = 540 m/s |
| Answer» a girl stand at a distance of 170m in front of a high wall and claps. what will be the time interval when she hears its echo? [speed of sound = 540 m/s | |
| 6673. |
A boy is sitting on a merry-go-round which is moving with a constant speed of 10 mS−1. This means that the boy is : (a) at rest (c) in accelerated motion (b) moving with no acceleration (d) moving with uniform velocity |
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Answer» A boy is sitting on a merry-go-round which is moving with a constant speed of 10 mS−1. This means that the boy is : (a) at rest (c) in accelerated motion (b) moving with no acceleration (d) moving with uniform velocity |
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| 6674. |
State the usefulness of Newton's third law of motion. |
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Answer» State the usefulness of Newton's third law of motion. |
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| 6675. |
The force of attraction between cation and anion is called _______ . |
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Answer» The force of attraction between cation and anion is called _______ . |
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| 6676. |
Question 22The volume of a 500 g sealed packet is 350 cm3. Will the packet float or sink in water if the density of water is 1 g cm−3? What will be the mass of the water displaced by this packet? |
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Answer» Question 22 |
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| 6677. |
18. A body dropped from the top of a tower clears 9/25th of the total height of the tower in its last second of flight. What is the height of the tower? |
| Answer» 18. A body dropped from the top of a tower clears 9/25th of the total height of the tower in its last second of flight. What is the height of the tower? | |
| 6678. |
Calculate the quantity of electricity that would be required to reduce 12.3 g nitrobenzene to aniline if current efficiency for the process is 50 percent.If the potential drop across the cell is 3V, how much energy will be consumed |
| Answer» Calculate the quantity of electricity that would be required to reduce 12.3 g nitrobenzene to aniline if current efficiency for the process is 50 percent.If the potential drop across the cell is 3V, how much energy will be consumed | |
| 6679. |
134.The deceleration experienced by a block of mass m with force is given by a= -bv where a= acceleration b= constant v0 = velocity at t=0 . now find velocity at time t |
| Answer» 134.The deceleration experienced by a block of mass m with force is given by a= -bv where a= acceleration b= constant v0 = velocity at t=0 . now find velocity at time t | |
| 6680. |
two bodies of masses m1 and m2 have same kinetic energy. the ratio of their momentum is |
| Answer» two bodies of masses m1 and m2 have same kinetic energy. the ratio of their momentum is | |
| 6681. |
Fill in the blanks(1) The energy stored in the dry cell is in the form of …………. .(2) The work done is zero if there is no ……………… .(3) Flowing water has ……………. energy.(4) By stretching the rubber strings of a catapult we store …………….. energy in it. |
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Answer» Fill in the blanks (1) The energy stored in the dry cell is in the form of …………. . (2) The work done is zero if there is no ……………… . (3) Flowing water has ……………. energy. (4) By stretching the rubber strings of a catapult we store …………….. energy in it. |
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| 6682. |
Centripetal force |
| Answer» Centripetal force | |
| 6683. |
Identify the device which is shown below. |
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Answer» Identify the device which is shown below.
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| 6684. |
Since two stones lying on the surface of the earth have mass, a gravitational force will always exist between them. And it will try to pull the stones towards each other. But actually, we don't see the stones moving towards each other, why?Statement 1: The acceleration because of gravitational force is in the range of 10-12m/s2Statement 2: Stones are lying in a flat surface, so they cannot moveStatement 3: The force of friction is much higher than gravitational force. Statement 4: The stones are irregular in shape, so they cannot move |
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Answer» Since two stones lying on the surface of the earth have mass, a gravitational force will always exist between them. And it will try to pull the stones towards each other. But actually, we don't see the stones moving towards each other, why? Statement 1: The acceleration because of gravitational force is in the range of 10-12m/s2 Statement 2: Stones are lying in a flat surface, so they cannot move Statement 3: The force of friction is much higher than gravitational force. Statement 4: The stones are irregular in shape, so they cannot move |
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| 6685. |
When we cut a log of wood with a saw it becomes warm, why? |
| Answer» When we cut a log of wood with a saw it becomes warm, why? | |
| 6686. |
While constructing a house in a coastal area, in which direction should the windows preferably face and why? |
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Answer» While constructing a house in a coastal area, in which direction should the windows preferably face and why? |
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| 6687. |
The numerical value of ratio of displacement to distance is equal to or less than one |
| Answer» The numerical value of ratio of displacement to distance is equal to or less than one | |
| 6688. |
One of the prongs of a tuning fork is struck against a rigid wall. A to and fro motion of the prongs is observed. Then, the vibrating fork is touched to a still water surface. Which of the following phenomena is observed in the water? |
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Answer» One of the prongs of a tuning fork is struck against a rigid wall. A to and fro motion of the prongs is observed. Then, the vibrating fork is touched to a still water surface. Which of the following phenomena is observed in the water? |
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| 6689. |
A particle of mass 2 kg moves with an initial velocity of →v=4^i+4^j ms−1. A constant force of →F=−20^j N is applies on the particle. Initially, the particle was at (0,0). The x-cordinate of the particle when its y-coordinate again becomes zero is given by |
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Answer» A particle of mass 2 kg moves with an initial velocity of →v=4^i+4^j ms−1. A constant force of →F=−20^j N is applies on the particle. Initially, the particle was at (0,0). The x-cordinate of the particle when its y-coordinate again becomes zero is given by |
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| 6690. |
Two bikes get closer by 10 m every second while travelling in the opposite directions. They get closer by 1 m in every second while travelling in the same directions. The speeds of the two bikes will be: |
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Answer» Two bikes get closer by 10 m every second while travelling in the opposite directions. They get closer by 1 m in every second while travelling in the same directions. The speeds of the two bikes will be: |
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| 6691. |
Fig. 10.13 shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south dirction. There are no other magnets or magnetic material nearby. (a) Insert two magnetic fiels lines on either side of the magnet using arrow head to show the direction of each field line. (b) Indicate by crosses, the likely positions of the neutral points. (c) What is the magnitude of the magnetic field at each neutral points ? Give a reason for your answer. |
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Answer» Fig. 10.13 shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south dirction. There are no other magnets or magnetic material nearby.
(a) Insert two magnetic fiels lines on either side of the magnet using arrow head to show the direction of each field line. (b) Indicate by crosses, the likely positions of the neutral points. (c) What is the magnitude of the magnetic field at each neutral points ? Give a reason for your answer. |
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| 6692. |
Which is having more effect on the kinetic energy. Either increase of velocity or increase of mass of the object? [2 MARKS] |
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Answer» Which is having more effect on the kinetic energy. Either increase of velocity or increase of mass of the object? [2 MARKS] |
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| 6693. |
A Convex lens of focal length 10 cm is placed at a diatance of 20 cm from a wall. How far from the lens should an object be placed so as to form its real image on the wall ? |
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Answer» A Convex lens of focal length 10 cm is placed at a diatance of 20 cm from a wall. How far from the lens should an object be placed so as to form its real image on the wall ? |
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| 6694. |
An object moves with an acceleration of 3 m s−2 when a force of 30 N is applied. The mass of the body is: |
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Answer» An object moves with an acceleration of 3 m s−2 when a force of 30 N is applied. The mass of the body is: |
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| 6695. |
A plano convex lens has a thickness of 4cm when placed on a horizontal table with the curved surface in contact with it the apparent depth of the bottom most point of lens is 3cm. If the lens is nverted plane face is in contact with table, apparent depth of the centre of the plane face is found to be 25/8 cm, focal length of lens is- |
| Answer» A plano convex lens has a thickness of 4cm when placed on a horizontal table with the curved surface in contact with it the apparent depth of the bottom most point of lens is 3cm. If the lens is nverted plane face is in contact with table, apparent depth of the centre of the plane face is found to be 25/8 cm, focal length of lens is- | |
| 6696. |
Choose the correct statement. |
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Answer» Choose the correct statement. |
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| 6697. |
What is delta? |
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Answer» What is delta? |
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| 6698. |
a particle moves in the X-Y plane wuth the constant acceleration of 1.5 m/s2 in the direction making the angle of 37 degree with the X-axis at time t=0 the particle is at origin and the velocity is 8.0 m/s along the X-axis find the velocity and the position of the particle at t=4.0 s |
| Answer» a particle moves in the X-Y plane wuth the constant acceleration of 1.5 m/s2 in the direction making the angle of 37 degree with the X-axis at time t=0 the particle is at origin and the velocity is 8.0 m/s along the X-axis find the velocity and the position of the particle at t=4.0 s | |
| 6699. |
Sound waves have different speeds in different media because: |
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Answer» Sound waves have different speeds in different media because: |
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| 6700. |
31.inside conductor when electricity pass the electric field inside zero? |
| Answer» 31.inside conductor when electricity pass the electric field inside zero? | |
