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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.
| 151. |
A 40 g bullet was fired from a gun of mass 2 kg. If speed of the bullet is 500 m/s, find the recoil speed of the gun? |
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Answer» A 40 g bullet was fired from a gun of mass 2 kg. If speed of the bullet is 500 m/s, find the recoil speed of the gun? |
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| 152. |
State Pascal's law of transmission of pressure. |
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Answer» State Pascal's law of transmission of pressure. |
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| 153. |
What is pynometric density |
| Answer» What is pynometric density | |
| 154. |
Determine the field intensity at a point on perpendicular bisector of an electric dipole |
| Answer» Determine the field intensity at a point on perpendicular bisector of an electric dipole | |
| 155. |
An open pipe 40 cm long and a closed pipe 31 cm long, both having same diameter, are producing their first overtone, and these are in unison. Determine the end correction(in cm) of these pipes. |
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Answer» An open pipe 40 cm long and a closed pipe 31 cm long, both having same diameter, are producing their first overtone, and these are in unison. Determine the end correction(in cm) of these pipes. |
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| 156. |
Number of water molecules in 1 litre of water 1)18 . 2)181000 3)N⁴ . 4)55.55 NA |
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Answer» Number of water molecules in 1 litre of water 1)18 . 2)181000 3)N⁴ . 4)55.55 NA |
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| 157. |
Name the three fundamental quantities. |
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Answer» Name the three fundamental quantities. |
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| 158. |
A body floats in a liquid with a part of it submerged inside liquid. Is the weight of floating body greater than, equal to or less than upthrust ? |
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Answer» A body floats in a liquid with a part of it submerged inside liquid. Is the weight of floating body greater than, equal to or less than upthrust ? |
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| 159. |
The speed of sound in air is 330 m/s and the human brain can only distinguish sounds 0.1 s apart. A person is standing beside a source of the sound. What should be the minimum distance between the source and the reflecting surface for the echo to be heard by him? |
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Answer»
The speed of sound in air is 330 m/s and the human brain can only distinguish sounds 0.1 s apart. A person is standing beside a source of the sound. What should be the minimum distance between the source and the reflecting surface for the echo to be heard by him? |
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| 160. |
A 10 N metal block is suspended by a spring balance. A beaker containing some water is placed on a weighing machine which reads 20 N. The spring balance is now lowered so that the block gets immersed in water. The spring balance now reads 8 N. What is the reading of the weighing machine ? |
| Answer» A 10 N metal block is suspended by a spring balance. A beaker containing some water is placed on a weighing machine which reads 20 N. The spring balance is now lowered so that the block gets immersed in water. The spring balance now reads 8 N. What is the reading of the weighing machine ? | |
| 161. |
A planet has a twice the mass of earth and of identical size. What will be the height above the surgace of planet where its acceleration due to gravity reduces by36 percent of its value on its surfac |
| Answer» A planet has a twice the mass of earth and of identical size. What will be the height above the surgace of planet where its acceleration due to gravity reduces by36 percent of its value on its surfac | |
| 162. |
a ball when slid on a horizontal surface eventually come to a stop,even through seemingly no force is a acting on it does not this contradict galileo,s statement |
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Answer» a ball when slid on a horizontal surface eventually come to a stop,even through seemingly no force is a acting on it does not this contradict galileo,s statement |
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| 163. |
The velocity- time equation is represented by |
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Answer» The velocity- time equation is represented by |
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| 164. |
Average velocity is _____. |
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Answer» Average velocity is _____. |
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| 165. |
Answer the following:(1) Give any two examples of force in each case:-(a) Lifts (b) pushes (c) pulls(d) attracts (e) changes the shape of object.(2) Which of the following has more inertia?(a) A rubber ball and a stone of the same size.(b) A bicycle and a train(c) A Five-rupee coin and a one-rupee coin |
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Answer» Answer the following: (1) Give any two examples of force in each case:- (a) Lifts (b) pushes (c) pulls (d) attracts (e) changes the shape of object. (2) Which of the following has more inertia? (a) A rubber ball and a stone of the same size. (b) A bicycle and a train (c) A Five-rupee coin and a one-rupee coin |
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| 166. |
Which unit can be used to measure the frequency of a sound wave? |
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Answer» Which unit can be used to measure the frequency of a sound wave? |
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| 167. |
State the universal law of gravitation. [2 MARKS] |
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Answer» State the universal law of gravitation. |
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| 168. |
Why are pressure cookers recommended for cooking at high altitudes? |
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Answer» Why are pressure cookers recommended for cooking at high altitudes? |
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| 169. |
How do you define 1 astronomical unit? |
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Answer» How do you define 1 astronomical unit? |
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| 170. |
An ant takes 5 s to complete one round trip along a circular path. How much time will it take for the ant to travel along the diameter of the circle and come back? Assume that the speed of the ant is constant throughout the process. |
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Answer» An ant takes 5 s to complete one round trip along a circular path. How much time will it take for the ant to travel along the diameter of the circle and come back? Assume that the speed of the ant is constant throughout the process. |
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| 171. |
the focal lenghth of a concave mirroe is fand the dia†an ce from the object to pfincipal focus is x. then find the ratio of the size of the image to the size of the object. |
| Answer» the focal lenghth of a concave mirroe is fand the dia†an ce from the object to pfincipal focus is x. then find the ratio of the size of the image to the size of the object. | |
| 172. |
A block of mass m moving at a speed v compresses a spring through a distance x before it's speed is halved find the spring constant of the spring. |
| Answer» A block of mass m moving at a speed v compresses a spring through a distance x before it's speed is halved find the spring constant of the spring. | |
| 173. |
A particle of mass 0.5 kg is subjected to a forcewhich varies with distance as shown in graph(N)0112(u) XIf the speed of the particle at x 0 is 4 m/s, thenits speed at X = 8 m is(1) 8 m/s(2) 16 m/s(3) 32 m/s(4) 4 m/s |
| Answer» A particle of mass 0.5 kg is subjected to a forcewhich varies with distance as shown in graph(N)0112(u) XIf the speed of the particle at x 0 is 4 m/s, thenits speed at X = 8 m is(1) 8 m/s(2) 16 m/s(3) 32 m/s(4) 4 m/s | |
| 174. |
The distance between maximum and the adjacent minimum disturbance in a wave is 6 cm. The wavelength of the wave would be(2) 3 cm(4) 24 cm(1) 6 cm (312 cm |
| Answer» The distance between maximum and the adjacent minimum disturbance in a wave is 6 cm. The wavelength of the wave would be(2) 3 cm(4) 24 cm(1) 6 cm (312 cm | |
| 175. |
Does the speaker seem happy about his decision? |
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Answer» Does the speaker seem happy about his decision? |
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| 176. |
A student measures the distance traversed in free fall of a body, initially at rest in a given time. He uses this data to estimate g, the acceleration dueto gravity. If the maximum percentage errors in measurement of the distance and the time are e1 and e2 respectively, the percentage error in the estimation of g is |
| Answer» A student measures the distance traversed in free fall of a body, initially at rest in a given time. He uses this data to estimate g, the acceleration dueto gravity. If the maximum percentage errors in measurement of the distance and the time are e1 and e2 respectively, the percentage error in the estimation of g is | |
| 177. |
What is the basis of unification of forces. |
| Answer» What is the basis of unification of forces. | |
| 178. |
Saket bought a new racing car and started testing the acceleration claimed by the company with uniform acceleration from 18.5 m/s to 46.1 m/s in 2.47 seconds. The distance traveled by him in this time will be- |
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Answer» Saket bought a new racing car and started testing the acceleration claimed by the company with uniform acceleration from 18.5 m/s to 46.1 m/s in 2.47 seconds. The distance traveled by him in this time will be- |
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| 179. |
What is the current (I) in the circuit? |
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Answer» What is the current (I) in the circuit? |
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| 180. |
A train is moving with a speed of 40 m s−1. On applying the brakes, it comes to rest in 20 s. What is the magnitude of average acceleration of the train? |
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Answer» A train is moving with a speed of 40 m s−1. On applying the brakes, it comes to rest in 20 s. What is the magnitude of average acceleration of the train? |
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| 181. |
A body goes from A to with a velocity of 20m/s and comes back B to A with a velocity of 30 m/s.The average velocity of the body during the whole journey is? |
| Answer» A body goes from A to with a velocity of 20m/s and comes back B to A with a velocity of 30 m/s.The average velocity of the body during the whole journey is? | |
| 182. |
capacity of an isolated sphere is increased n times when it is enclosed by an earthed concentric shell,the ratio of radii of shell to the sphere is |
| Answer» capacity of an isolated sphere is increased n times when it is enclosed by an earthed concentric shell,the ratio of radii of shell to the sphere is | |
| 183. |
The value of gravitational constant, G is |
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Answer» The value of gravitational constant, G is |
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| 184. |
A block of mass 10 kg on a horizontal surface, pressure experienced by surface is 103Pa, then area of cross-section is? |
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Answer» A block of mass 10 kg on a horizontal surface, pressure experienced by surface is 103Pa, then area of cross-section is? |
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| 185. |
If the radius of the earth shrinks by 4% and there is no change in its mass then by how much does the value of g change?( Given for x<<1 , assume 1(1−x)2≈1+2x) |
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Answer» If the radius of the earth shrinks by 4% and there is no change in its mass then by how much does the value of g change? |
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| 186. |
The amount of matter in the unit volume of the substance is its _______. |
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Answer» The amount of matter in the unit volume of the substance is its _______. |
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| 187. |
A horse pulls a cart with a force of 1000 N. The force of friction between the cart and the ground is 1000 N. The cart do not move. Why? |
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Answer» A horse pulls a cart with a force of 1000 N. The force of friction between the cart and the ground is 1000 N. The cart do not move. Why? |
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| 188. |
What length of a copper wire of cross-sectional are 0.01 mm2, resistivity 1.7 × 10–8 Ohm m, will be needed to prepare a resistance of 1.7 kΩ? |
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Answer» What length of a copper wire of cross-sectional are 0.01 mm2, resistivity 1.7 × 10–8 Ohm m, will be needed to prepare a resistance of 1.7 kΩ? |
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| 189. |
Why is a convex mirror is said to have a virtual principal focus? |
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Answer» Why is a convex mirror is said to have a virtual principal focus? |
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| 190. |
The __(biotic/ abiotic) components of a forest constitute of sunlight, air and water. |
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Answer» The |
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| 191. |
Two balls are projected simultaneously with same speed from top of a tower, once vertically upward and other downward. They reach the ground in 9 s and 4 s respectively. Find the height of the tower. (g=10m/s^2) |
| Answer» Two balls are projected simultaneously with same speed from top of a tower, once vertically upward and other downward. They reach the ground in 9 s and 4 s respectively. Find the height of the tower. (g=10m/s^2) | |
| 192. |
The phasor diagram for a component (other than a resistor) connected to an AC source, at an instant, is shown below. The value of voltage across the component and current flowing through the circuit, at this instant, respectively is - |
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Answer» The phasor diagram for a component (other than a resistor) connected to an AC source, at an instant, is shown below. The value of voltage across the component and current flowing through the circuit, at this instant, respectively is - |
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| 193. |
An aeroplane accelerates from rest down a runaway at 3 ms−2 for 30 s until it finally lifts off the ground. Determine the distance travelled before take off. |
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Answer» An aeroplane accelerates from rest down a runaway at 3 ms−2 for 30 s until it finally lifts off the ground. Determine the distance travelled before take off. |
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| 194. |
Identify the earthing pin in the plug: |
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Answer» Identify the earthing pin in the plug: |
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| 195. |
A bullet of 10 g strikes sand-bag at a speed of 103 m/s and comes to stop after travelling 5 cm. Calculate:(i) The resistive force exerted by the sand on the bullet.(ii) Time of collision. |
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Answer» A bullet of 10 g strikes sand-bag at a speed of 103 m/s and comes to stop after travelling 5 cm. Calculate: (i) The resistive force exerted by the sand on the bullet. (ii) Time of collision. |
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| 196. |
Average Velocity and Average Speed is the same for which of the following situations: 1) A one-way trip on a straight road. 2) A car making a round trip on a circular track. 3) A bullet travelling in a straight line. |
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Answer» Average Velocity and Average Speed is the same for which of the following situations: 1) A one-way trip on a straight road. 2) A car making a round trip on a circular track. 3) A bullet travelling in a straight line. |
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| 197. |
A negligibly small current is passed through a wire of length 15 mand uniform cross-section 6.0 × 10–7 m2, and its resistance ismeasured to be 5.0 W. What is the resistivity of the material at thetemperature of the experiment? |
| Answer» A negligibly small current is passed through a wire of length 15 mand uniform cross-section 6.0 × 10–7 m2, and its resistance ismeasured to be 5.0 W. What is the resistivity of the material at thetemperature of the experiment? | |
| 198. |
Why does a bullet go past a glass screen making a small hole but a stone of the same velocity makes the whole glass surface crack? |
| Answer» Why does a bullet go past a glass screen making a small hole but a stone of the same velocity makes the whole glass surface crack? | |
| 199. |
In a new system of units, the unit of length is 5 cm and the uniut of mass is 29 g. Then what will be the unit of density in this new system ? |
| Answer» In a new system of units, the unit of length is 5 cm and the uniut of mass is 29 g. Then what will be the unit of density in this new system ? | |
| 200. |
Ram wants to observe the change in size of the pupil. He flashes light on Rajat's eye with a torch. What will he observe and why? Why should Ram not use laser light for this purpose? [3 MARKS] |
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Answer» Ram wants to observe the change in size of the pupil. He flashes light on Rajat's eye with a torch. What will he observe and why? Why should Ram not use laser light for this purpose? [3 MARKS] |
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