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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.
| 401. |
116. A half HP motor runs at 1800rpm. If the efficiency of motor is 60%, then the work done by motor in one rotation will be? |
| Answer» 116. A half HP motor runs at 1800rpm. If the efficiency of motor is 60%, then the work done by motor in one rotation will be? | |
| 402. |
Why does sound require a medium to propagate why can't it propagate in vacuum? |
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Answer» Why does sound require a medium to propagate why can't it propagate in vacuum? |
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| 403. |
Where does an image form in our eye? |
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Answer» Where does an image form in our eye? |
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| 404. |
28 If a, b ,c are positive integers such that abc= 2018 then the largest possible value of the sum of a, b , c |
| Answer» 28 If a, b ,c are positive integers such that abc= 2018 then the largest possible value of the sum of a, b , c | |
| 405. |
72.why negative number multiplied by a negative number yields positive number? |
| Answer» 72.why negative number multiplied by a negative number yields positive number? | |
| 406. |
A student takes some water in a beaker and heats it over a flame for determining its boiling point. He keeps on taking its temperature readings. He would observe that the temperature of water :(1) keeps on increasing regularly(2) keeps on increasing irregularly(3) first increases slowly, then decreases rapidly and eventually becomes constant(4) first increases gradually and then becomes constant. |
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Answer» A student takes some water in a beaker and heats it over a flame for determining its boiling point. He keeps on taking its temperature readings. He would observe that the temperature of water : (1) keeps on increasing regularly (2) keeps on increasing irregularly (3) first increases slowly, then decreases rapidly and eventually becomes constant (4) first increases gradually and then becomes constant. |
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| 407. |
Question 10 (iv)State whether the following statement is ‘True’ or ‘False’The planets keep changing their position with respect to stars. |
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Answer» Question 10 (iv) |
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| 408. |
Why iran ship floats on water when density of iron is more than liquid |
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Answer» Why iran ship floats on water when density of iron is more than liquid |
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| 409. |
27.If 2214 is written as a product of two positive integers whose difference is as small as possible, then find the difference. |
| Answer» 27.If 2214 is written as a product of two positive integers whose difference is as small as possible, then find the difference. | |
| 410. |
DESIGN AN ACTIVITY TO PROVE TTHAT LOUDDNESS DEPENDS UPON TYPE OF MEDIUM. |
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Answer» DESIGN AN ACTIVITY TO PROVE TTHAT LOUDDNESS DEPENDS UPON TYPE OF MEDIUM. |
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| 411. |
State the factors controlling the rate of evaporation. How do they control the process? |
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Answer» State the factors controlling the rate of evaporation. How do they control the process? |
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| 412. |
A block of mass m is kept on a plank. Thecoefficient of friction between the plank and theblock is 1. The plank is slowly raised from one endso that it makes angle 0 with horizontal. The forceof friction acting on the plank when 0 30^° isFrAmy77777ban 30%Mg(1) J2Mg(2)23Mg(3)E2(4) Ma |
| Answer» A block of mass m is kept on a plank. Thecoefficient of friction between the plank and theblock is 1. The plank is slowly raised from one endso that it makes angle 0 with horizontal. The forceof friction acting on the plank when 0 30^° isFrAmy77777ban 30%Mg(1) J2Mg(2)23Mg(3)E2(4) Ma | |
| 413. |
If in cons†an t speed the external force acting on a moving body is cancelled due to frictional force of same magnitude then what will hapen if there is no cons†an t speed ? |
| Answer» If in cons†an t speed the external force acting on a moving body is cancelled due to frictional force of same magnitude then what will hapen if there is no cons†an t speed ? | |
| 414. |
How is a force caused give reasons |
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Answer» How is a force caused give reasons |
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| 415. |
The Earth is 8.3 light minutes from the Sun. What does this statement mean? |
| Answer» The Earth is 8.3 light minutes from the Sun. What does this statement mean? | |
| 416. |
A small coin is placed on a flat horizontal turn table. The turn table is observed to make three revolutions in 3.14 sec. What is the coefficient of static friction between the coin and turn table if the coin is observed to slide off the turn table when it is greater than 10 cm from the centre of turn tab |
| Answer» A small coin is placed on a flat horizontal turn table. The turn table is observed to make three revolutions in 3.14 sec. What is the coefficient of static friction between the coin and turn table if the coin is observed to slide off the turn table when it is greater than 10 cm from the centre of turn tab | |
| 417. |
Proof for electrostatic force is conservative force(using line integral) |
| Answer» Proof for electrostatic force is conservative force(using line integral) | |
| 418. |
A: For rolling, friction is necessary R: Rolling motion is not possible on smooth surface. How both assertion and reason are false |
| Answer» A: For rolling, friction is necessary R: Rolling motion is not possible on smooth surface. How both assertion and reason are false | |
| 419. |
a) State the characteristics of the image formed in a plane mirror.b) What is a virtual image? How is it diffrent from a real image? |
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Answer» a) State the characteristics of the image formed in a plane mirror. b) What is a virtual image? How is it diffrent from a real image? |
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| 420. |
Should we include the conical nodal surfaces of dz2 orbitals in total no of nodes |
| Answer» Should we include the conical nodal surfaces of dz2 orbitals in total no of nodes | |
| 421. |
Power factor |
| Answer» Power factor | |
| 422. |
At 15∘C the height of Eifel tower is 324m. If it is made of iron, what will be the increase in length in cm, at 30∘C? ( Take coefficient of linear expansion of Iron as 11.5×10−6∘C−1) |
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Answer» At 15∘C the height of Eifel tower is 324m. If it is made of iron, what will be the increase in length in cm, at 30∘C? ( Take coefficient of linear expansion of Iron as 11.5×10−6∘C−1) |
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| 423. |
Question 14 Paheli wants to deposit silver on an iron spoon. She took silver nitrate (AgNO3) solution in a beaker and set up a simple circuit for electroplating. Which terminal of the battery should the spoon be connected to? What material should the other electrode be made of? |
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Answer» Question 14 Paheli wants to deposit silver on an iron spoon. She took silver nitrate (AgNO3) solution in a beaker and set up a simple circuit for electroplating. Which terminal of the battery should the spoon be connected to? What material should the other electrode be made of? |
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| 424. |
A sonometer wire is stretched by a hanging metal bob. Its fundamental frequency is f1. When the bob is completely immersed in water, the frequency becomes f2. The relative density of the metal is |
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Answer» A sonometer wire is stretched by a hanging metal bob. Its fundamental frequency is f1. When the bob is completely immersed in water, the frequency becomes f2. The relative density of the metal is |
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| 425. |
When an object gets negatively charged by the process of friction, then: (a) the object loses some electrons (b) the object loses some protons (c) the object gains some electrons (d) the object gains some protons |
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Answer» When an object gets negatively charged by the process of friction, then: (a) the object loses some electrons (b) the object loses some protons (c) the object gains some electrons (d) the object gains some protons |
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| 426. |
The current in a wire varies with timeaccording to the relation i (3.0 A) + (2.0A/s) t. How many coulombs of charge passa cross section of the wire in the time intervalbetween t = 0 and t = 4.0 s : |
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Answer» The current in a wire varies with time according to the relation i (3.0 A) + (2.0 A/s) t. How many coulombs of charge pass a cross section of the wire in the time interval between t = 0 and t = 4.0 s : |
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| 427. |
A tester is made with the two terminals of a battery connected to separate wires, each with one end free. A light bulb is also connected as a part of the circuit. Now an object is used to connect the free ends, and it is observed that the light bulb does not glow, in other words, there is no electricity flowing. Which of the following could be that object? |
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Answer» A tester is made with the two terminals of a battery connected to separate wires, each with one end free. A light bulb is also connected as a part of the circuit. Now an object is used to connect the free ends, and it is observed that the light bulb does not glow, in other words, there is no electricity flowing. Which of the following could be that object? |
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| 428. |
I use electricity at my house and I am charged some price for it. What are the dependent and independent variables respectively in this situation? [2 MARKS] |
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Answer» I use electricity at my house and I am charged some price for it. What are the dependent and independent variables respectively in this situation? [2 MARKS] |
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| 429. |
Which part of the following musical instruments vibrate to produce sound i.) Tabla ii.) Veena iii.) Flute [3 MARKS] |
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Answer» Which part of the following musical instruments vibrate to produce sound i.) Tabla ii.) Veena iii.) Flute |
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| 430. |
Why is center of gravity towards down the earth It could be on the left or right or against the 🌍? |
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Answer» Why is center of gravity towards down the earth It could be on the left or right or against the 🌍? |
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| 431. |
Current drawn by battery just after closing the switch is |
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Answer» Current drawn by battery just after closing the switch is |
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| 432. |
44. Why shadow is always black in colour? |
| Answer» 44. Why shadow is always black in colour? | |
| 433. |
(a) Name the three layers of earth. Draw a labelled diagram to show the structure of earth. (b) What is a seismograph? Draw a labelled diagram of a seismograph. |
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Answer» (a) Name the three layers of earth. Draw a labelled diagram to show the structure of earth. (b) What is a seismograph? Draw a labelled diagram of a seismograph. |
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| 434. |
block A of mass 4 kg is to be kept at rest against a smooth vertical wall by applying a force . the required force is |
| Answer» block A of mass 4 kg is to be kept at rest against a smooth vertical wall by applying a force . the required force is | |
| 435. |
36.The position time graph of an object in uniform motion is given below. Calculate the velocity with which object is moving |
| Answer» 36.The position time graph of an object in uniform motion is given below. Calculate the velocity with which object is moving | |
| 436. |
what is voltage drop? |
| Answer» what is voltage drop? | |
| 437. |
If the radius of earth shrinks to kR (k < 1), whereR is the radius of Earth, then the time period ofrotation of Earth, about its axis will become |
| Answer» If the radius of earth shrinks to kR (k < 1), whereR is the radius of Earth, then the time period ofrotation of Earth, about its axis will become | |
| 438. |
Across an opening 40 m wide, dam A holds back a body of water that is 80 m deep. Across an opening 80 m wide, dam B holds back a body of water that is 40 m deep. Which dam experiences a greater total force on its surface? |
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Answer» Across an opening 40 m wide, dam A holds back a body of water that is 80 m deep. Across an opening 80 m wide, dam B holds back a body of water that is 40 m deep. Which dam experiences a greater total force on its surface?
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| 439. |
Which of the following planets is the nearest to the Sun? Does it have any moon? |
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Answer» Which of the following planets is the nearest to the Sun? Does it have any moon? |
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| 440. |
If a=b, show that abc=bac |
| Answer» If a=b, show that abc=bac | |
| 441. |
The period of oscillation of a simple pendulum is given by the relation T = 2π. The measuredvaluesof length L and the period of oscilations for 50 oscillations are (20.0+ 0.1) cm and (45 1)s respectively. Find the absolute error in determination of g |
| Answer» The period of oscillation of a simple pendulum is given by the relation T = 2π. The measuredvaluesof length L and the period of oscilations for 50 oscillations are (20.0+ 0.1) cm and (45 1)s respectively. Find the absolute error in determination of g | |
| 442. |
An ideal gas of volume v and pressure P expense isothermally to volume 16 v and then compressed adiabatically to volume the final pressure of gas is |
| Answer» An ideal gas of volume v and pressure P expense isothermally to volume 16 v and then compressed adiabatically to volume the final pressure of gas is | |
| 443. |
An earth quake is said to be destructive if the reading on the _________ scale is ________ than 7. The information in which alternative completes the given statement? |
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Answer» An earth quake is said to be destructive if the reading on the _________ scale is ________ than 7. The information in which alternative completes the given statement? |
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| 444. |
Which is the ascending order of magnitude, for different kinds of friction? |
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Answer» Which is the ascending order of magnitude, for different kinds of friction? |
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| 445. |
Which of the following are sources of noise pollution? |
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Answer» Which of the following are sources of noise pollution? |
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| 446. |
Critical angle for a light ray travelling from denser to rarer medium is defined as the angle of incidence at which the angle of refraction is 90°. If a ray of light travels from water (μw) to air (μa). Find the critical angle? |
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Answer» Critical angle for a light ray travelling from denser to rarer medium is defined as the angle of incidence at which the angle of refraction is 90°. |
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| 447. |
45. Find the wavelength of an electron and a 10 gram object moving with a metre per second each |
| Answer» 45. Find the wavelength of an electron and a 10 gram object moving with a metre per second each | |
| 448. |
Question 4 (a)An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms:muscular, contact, non-contact, gravity, friction, shape, attraction(a) To stretch the bow, the archer applies a force that causes a change in its ___. |
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Answer» Question 4 (a) |
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| 449. |
Why does a balloon stick to a wall after being rubbed against your hair? |
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Answer» Why does a balloon stick to a wall after being rubbed against your hair? |
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| 450. |
Observation 1: Try to stop a ball coming towards you,so as to save a boundary, by applying a force of some magnitude in the opposite direction of the motion of the ball.Observation 2: In the same case, you apply the force of same magnitude but in same direction of the motion of the ball.Observation 3: In the same case, you apply the force in the opposite direction of the motion of the ball but its magnitude is less.In which case/cases will you be able to stop the boundary. Why is that? |
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Answer» Observation 1: Try to stop a ball coming towards you,so as to save a boundary, by applying a force of some magnitude in the opposite direction of the motion of the ball. Observation 2: In the same case, you apply the force of same magnitude but in same direction of the motion of the ball. Observation 3: In the same case, you apply the force in the opposite direction of the motion of the ball but its magnitude is less. In which case/cases will you be able to stop the boundary. Why is that? |
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