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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.
| 12551. |
A copper cube of mass 200g slides down on a rough inclined plane of inclination 37∘ at a constant speed. Assume that any loss in mechanical energy goes into the copper block as thermal energy. Find the increases in the temperature of the block as it slides down through 60 cm. Specific heat capacity of copper = 420 J kg−1K−1. |
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Answer» A copper cube of mass 200g slides down on a rough inclined plane of inclination 37∘ at a constant speed. Assume that any loss in mechanical energy goes into the copper block as thermal energy. Find the increases in the temperature of the block as it slides down through 60 cm. Specific heat capacity of copper = 420 J kg−1K−1. |
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| 12552. |
A ball is thrown vertically upward with a velocity of 60 m/s. The maximum height to which ball rises is |
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Answer» A ball is thrown vertically upward with a velocity of 60 m/s. The maximum height to which ball rises is |
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| 12553. |
If the time interval between lightning and thunder is 2 seconds, what is the distance of the point of the lightning ? ( Speed of sound in air is 346 ms-1 ) |
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Answer» If the time interval between lightning and thunder is 2 seconds, what is the distance of the point of the lightning ? ( Speed of sound in air is 346 ms-1 ) |
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| 12554. |
A girl is wearing a pair of flat shoes. She weighs 550 N. The area of contact of one shoe with the ground is 160cm2. What pressure will be exerted by the girl on the ground : (a) if she stands on two feet ? (b) if she stands on one foot ? |
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Answer» A girl is wearing a pair of flat shoes. She weighs 550 N. The area of contact of one shoe with the ground is 160cm2. What pressure will be exerted by the girl on the ground : |
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| 12555. |
How mass increases with speed ? |
| Answer» How mass increases with speed ? | |
| 12556. |
Given mass of earth is 6 × 1024 kg and mean radius of earth is 6.4 × 106 m. Calculate the value of acceleration due to gravity (g) on the surface of the earth. |
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Answer» Given mass of earth is 6 × 1024 kg and mean radius of earth is 6.4 × 106 m. Calculate the value of acceleration due to gravity (g) on the surface of the earth. |
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| 12557. |
When an arrow is shot from its bow, it has kinetic energy. Which energy transformed to give arrow kinetic energy? |
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Answer» When an arrow is shot from its bow, it has kinetic energy. Which energy transformed to give arrow kinetic energy? |
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| 12558. |
A ball thrown vertically upwards with a speed of 19.6ms from the top of a tower returns to the earth in 6s. Find the height of tower |
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Answer» A ball thrown vertically upwards with a speed of 19.6ms from the top of a tower returns to the earth in 6s. Find the height of tower |
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| 12559. |
Find the mass of water lifted off by pump of 0.5 horsepower to height of 10 m in 49 seconds |
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Answer» Find the mass of water lifted off by pump of 0.5 horsepower to height of 10 m in 49 seconds |
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| 12560. |
An observer A fires a gun and another observer B at a distance 1650 m away from A hears its sound. If the speed of sound is 330 m s−1, find the time when B will hear the sound after firing by A. |
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Answer» An observer A fires a gun and another observer B at a distance 1650 m away from A hears its sound. If the speed of sound is 330 m s−1, find the time when B will hear the sound after firing by A. |
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| 12561. |
A body of mass 2kg is moving with an acceleration of 50cm s^-1 calculate the force acting |
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Answer» A body of mass 2kg is moving with an acceleration of 50cm s^-1 calculate the force acting |
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| 12562. |
A bullet of mass 20g moving with a velocity of 100m/s strikes a wooden block of mass 80g and gets embedded into it . Calculate the velocity of the combined system . |
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Answer» A bullet of mass 20g moving with a velocity of 100m/s strikes a wooden block of mass 80g and gets embedded into it . Calculate the velocity of the combined system . |
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| 12563. |
Statement 1: Nuclear bombs can destroy big cities. Statement 2: Nuclear power plants can produce energy to power big cities. |
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Answer» Statement 1: Nuclear bombs can destroy big cities. |
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| 12564. |
Which of the following sound waves have the highest loudness? |
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Answer» Which of the following sound waves have the highest loudness? |
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| 12565. |
The force exerted by the floor of an elevator on the foot of a person is _______ the weight of the person if the elevator is going up and speeding up. |
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Answer» The force exerted by the floor of an elevator on the foot of a person is _______ the weight of the person if the elevator is going up and speeding up. |
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| 12566. |
Question 1 (b) Which of the following has more inertia: (b) a bicycle and a train? |
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Answer» Question 1 (b) Which of the following has more inertia: (b) a bicycle and a train? |
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| 12567. |
A pump lifts 200 kg of water through a height of 5m in 3minutes. Calculate the power of the pump in HP. |
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Answer» A pump lifts 200 kg of water through a height of 5m in 3minutes. Calculate the power of the pump in HP. |
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| 12568. |
Who described the law of gravitation during the Gupta period? |
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Answer» Who described the law of gravitation during the Gupta period? |
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| 12569. |
An object is placed on the principal axis of a concave lens at a distance of 40 cm from it. If the focal length of the lens is also 40 cm, find the location of the image and the magnification. [3 MARKS] |
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Answer» An object is placed on the principal axis of a concave lens at a distance of 40 cm from it. If the focal length of the lens is also 40 cm, find the location of the image and the magnification. [3 MARKS] |
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| 12570. |
What is the mass of an object whose weight is 49 N? Take g = 9.8 ms−2 |
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Answer» What is the mass of an object whose weight is 49 N? Take g = 9.8 ms−2 |
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| 12571. |
The magnetic field lines produced by a bar magnet originate from ___, in the region outside the magnet. |
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Answer» The magnetic field lines produced by a bar magnet originate from ___, in the region outside the magnet. |
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| 12572. |
A toy car is powered by water and compressed air. When the car is fully pumped up and released, it accelerates at 2 ms−2 for 3 seconds. As soon as this water runs out the car begins to slow down. The car travels 27 meters before coming to rest. What is its rate of acceleration when stopping and what is the total time of the motion? |
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Answer» A toy car is powered by water and compressed air. When the car is fully pumped up and released, it accelerates at 2 ms−2 for 3 seconds. As soon as this water runs out the car begins to slow down. The car travels 27 meters before coming to rest. What is its rate of acceleration when stopping and what is the total time of the motion? |
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| 12573. |
The time taken by a car to reach 90 km/h from rest is 5 minutes. Calculate: (i) The acceleration of the car (ii) The distance covered by the car [5 MARKS] |
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Answer» The time taken by a car to reach 90 km/h from rest is 5 minutes. Calculate: (i) The acceleration of the car (ii) The distance covered by the car [5 MARKS] |
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| 12574. |
A sound wave is passing through the air. 1000 compressions and rarefactions are passing through a point in one second. Which of the following is the frequency of the sound wave? |
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Answer» A sound wave is passing through the air. 1000 compressions and rarefactions are passing through a point in one second. Which of the following is the frequency of the sound wave? |
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| 12575. |
The factors that affect the strength of a magnetic field at a point due to a straight conductor carrying current are: |
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Answer» The factors that affect the strength of a magnetic field at a point due to a straight conductor carrying current are: |
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| 12576. |
The value of acceleration due to gravity of earth : (a) is the same on equator and poles (b) is the least on poles (c) is the least on equator (d) increases from pole to equator |
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Answer» The value of acceleration due to gravity of earth : |
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| 12577. |
50 g of copper is heated to increase its temperature by 10∘C. If the same quantity of heat is given to 10 g of water, the rise in its temperature is: Specific heat of copper is 420 J kg−1 ∘C. |
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Answer» 50 g of copper is heated to increase its temperature by 10∘C. If the same quantity of heat is given to 10 g of water, the rise in its temperature is: |
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| 12578. |
A car is being driven at a speed of 20m/sec when brakes are applied to bring it to rest in 5sec. The declaration produced in this case will be?? Answer is -4 m/sec square Teacher plz explain the evaluation |
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Answer» A car is being driven at a speed of 20m/sec when brakes are applied to bring it to rest in 5sec. The declaration produced in this case will be?? Answer is -4 m/sec square Teacher plz explain the evaluation |
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| 12579. |
A bottle is filled with water. A cap is put on the bottle and it is turned upside down. There is no air inside the bottle. The area of the cap in contact with the water is 4.0 × 10–4 m2. The density of water is 1000 kg m–3 and the gravitational field strength is 10 N kg–1. The water produces a force on the cap. What is the value of this force? |
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Answer» A bottle is filled with water. A cap is put on the bottle and it is turned upside down. There is no air inside the bottle. The area of the cap in contact with the water is 4.0 × 10–4 m2. The density of water is 1000 kg m–3 and the gravitational field strength is 10 N kg–1. The water produces a force on the cap. What is the value of this force? |
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| 12580. |
Two balls of mass 2 kg and 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet, the ratio of their kinetic energy will be___. Neglect air resistance in both the cases. |
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Answer» Two balls of mass 2 kg and 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet, the ratio of their kinetic energy will be___. Neglect air resistance in both the cases. |
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| 12581. |
Two materials P and Q are lowered into a trough of liquid as shown. Which of the following combinations is NOT possible when materials P and Q are mixed together and lowered into the trough again? |
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Answer» Two materials P and Q are lowered into a trough of liquid as shown.
Which of the following combinations is NOT possible when materials P and Q are mixed together and lowered into the trough again? |
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| 12582. |
The thimble of a screw gauge has 50 divisions. The spindle advances 1 mm when the screw is turned through two revolutions. What is the pitch of screw gauge? |
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Answer» The thimble of a screw gauge has 50 divisions. The spindle advances 1 mm when the screw is turned through two revolutions. What is the pitch of screw gauge? |
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| 12583. |
What is the shape when a non-wetting liquid is placed in a capillary tube |
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Answer» What is the shape when a non-wetting liquid is placed in a capillary tube
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| 12584. |
Question 3 From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 ms−1 . Calculate the initial recoil velocity of the rifle. |
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Answer» Question 3 From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 ms−1 . Calculate the initial recoil velocity of the rifle. |
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| 12585. |
A cricket ball weighing 100 g and moving with a speed of 20 m s−1 strikes a bat and remains is contact with it for 0.1 s. The average force exerted by the ball on the bat is: |
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Answer» A cricket ball weighing 100 g and moving with a speed of 20 m s−1 strikes a bat and remains is contact with it for 0.1 s. The average force exerted by the ball on the bat is: |
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| 12586. |
Assume the force of gravity to be constant for short heights above the surface of the Earth. A body is dropped from rest at a height h. If we ignore air resistance, what will its kinetic energy be just before it hits the ground? |
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Answer» Assume the force of gravity to be constant for short heights above the surface of the Earth. A body is dropped from rest at a height h. If we ignore air resistance, what will its kinetic energy be just before it hits the ground? |
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| 12587. |
There are so many stars in space but still why is it dark in there, evethough light can travel in vacuum? |
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Answer» There are so many stars in space but still why is it dark in there, evethough light can travel in vacuum? |
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| 12588. |
How do you know that some entity is a form of energy? |
| Answer» How do you know that some entity is a form of energy? | |
| 12589. |
When two bodies collide at the same time, which of the following is conserved? __ |
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Answer» When two bodies collide at the same time, which of the following is conserved? |
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| 12590. |
A 12 m long rope is tightly stretched between two points. A pulse generated in it travels forward and backward in 4 seconds. Calculate the speed of the pulse |
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Answer» A 12 m long rope is tightly stretched between two points. A pulse generated in it travels forward and backward in 4 seconds. Calculate the speed of the pulse |
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| 12591. |
What happens to the gravitational force between two objects when the distance between them is : (i) doubled ? (ii) halved ? |
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Answer» What happens to the gravitational force between two objects when the distance between them is : |
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| 12592. |
If the time taken to bring a ball to rest from a certain velocity v is reduced to half, what will be the change in values of: initial and final momentum? change in momentum? rate of change in momentum? |
Answer» If the time taken to bring a ball to rest from a certain velocity v is reduced to half, what will be the change in values of:
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| 12593. |
Two bodies at different temperatures are placed in contact. State the direction in which heat will flow. |
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Answer» Two bodies at different temperatures are placed in contact. State the direction in which heat will flow. |
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| 12594. |
A plane mirror of height 2.5 ft is used to see the entire image . |
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Answer» A plane mirror of height 2.5 ft is used to see the entire image . |
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| 12595. |
Which of the following options is not an advantage of a solar panel? |
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Answer» Which of the following options is not an advantage of a solar panel? |
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| 12596. |
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B of same mass does the same in 15 s.Compare the (i) work done, and (ii) power developed by the persons A and B. |
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Answer» It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B of same mass does the same in 15 s.Compare the (i) work done, and (ii) power developed by the persons A and B. |
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| 12597. |
Differentiate between distance and displacement. |
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Answer» Differentiate between distance and displacement. |
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| 12598. |
The velocity of a body at the end of 5 sec is 30m/s, at the end of 12sec is 58 m/s and at the end of 22 sec it is 98 m/s. The body is moving with Uniform velocity Uniform acceleration Uniform retardation Uniform displacement |
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Answer» The velocity of a body at the end of 5 sec is 30m/s, at the end of 12sec is 58 m/s and at the end of 22 sec it is 98 m/s. The body is moving with Uniform velocity Uniform acceleration Uniform retardation Uniform displacement |
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| 12599. |
A man running with a uniform speed u on a straight road observes a stationary bus at a distance d ahead of him. At that instant, the bus starts moving with an acceleration a. The condition that he would be able to catch the bus is |
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Answer» A man running with a uniform speed u on a straight road observes a stationary bus at a distance d ahead of him. At that instant, the bus starts moving with an acceleration a. The condition that he would be able to catch the bus is |
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| 12600. |
The repeated reflection that results in the persistence of sound is called ___ . |
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Answer» The repeated reflection that results in the persistence of sound is called |
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