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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.
| 3301. |
If coefficient of performance of A refrigerator is beta and heat given to surrounding is Q2 then what is heat absorbed. |
| Answer» If coefficient of performance of A refrigerator is beta and heat given to surrounding is Q2 then what is heat absorbed. | |
| 3302. |
While constructing a house, where do we construct ventilators; why? |
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Answer» While constructing a house, where do we construct ventilators; why? |
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| 3303. |
A batsman hits two balls of different masses 0.5 kg and 1 kg out of the stadium, with the same velocity. What would be the ratio of their kinetic energies? |
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Answer» A batsman hits two balls of different masses 0.5 kg and 1 kg out of the stadium, with the same velocity. What would be the ratio of their kinetic energies? |
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| 3304. |
Nichrome is not used to make the filament of an electric bulb. Why? |
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Answer» Nichrome is not used to make the filament of an electric bulb. Why? |
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| 3305. |
A simple pendulum consists of a light string from which a spherical Bob of mass M is suspended. The distance between the point of suspension and centre of the bob is l. The bob is given a tangential velocity v at a equilibrium position (i.e.at the lowest point). What can be the maximum value of velocity v, so that the pendulum oscillates without the string becoming slack ? |
| Answer» A simple pendulum consists of a light string from which a spherical Bob of mass M is suspended. The distance between the point of suspension and centre of the bob is l. The bob is given a tangential velocity v at a equilibrium position (i.e.at the lowest point). What can be the maximum value of velocity v, so that the pendulum oscillates without the string becoming slack ? | |
| 3306. |
Heat is a form of energy. What kind of energy is it? |
| Answer» Heat is a form of energy. What kind of energy is it? | |
| 3307. |
Two plane mirrors are inclined at an angle theta . A ray of light is incident on one mirror at an angle of incidence i . The ray is reflected from this mirror , falls on the second mirror from where it is reflected parallel to the first mirror. What is the value of i , the angle of incidence in terms of theta ? (a) 2theta-90° (b) 4theta-90° (c) theta-90° (d) 3theta-90° |
| Answer» Two plane mirrors are inclined at an angle theta . A ray of light is incident on one mirror at an angle of incidence i . The ray is reflected from this mirror , falls on the second mirror from where it is reflected parallel to the first mirror. What is the value of i , the angle of incidence in terms of theta ? (a) 2theta-90° (b) 4theta-90° (c) theta-90° (d) 3theta-90° | |
| 3308. |
How does the use of ball bearings reduce friction? |
| Answer» How does the use of ball bearings reduce friction? | |
| 3309. |
The purity of a substance can be tested by checking its _________ or __________. |
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Answer» The purity of a substance can be tested by checking its _________ or __________. |
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| 3310. |
Fill in the blanks. (a) As sunlight passes through a prism it gets divided into ………… colours of which the ………… colour is at the top. (b) ………… is necessary for the growth of plants. (c) The path of light is ………… . (d) A rainbow appears on the opposite side of the ………… . |
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Answer» Fill in the blanks. (a) As sunlight passes through a prism it gets divided into ………… colours of which the ………… colour is at the top. (b) ………… is necessary for the growth of plants. (c) The path of light is ………… . (d) A rainbow appears on the opposite side of the ………… . |
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| 3311. |
25.AN AMMETER OF RESISTANCE 0.8 OHMS CAN MEASURE CURRENT UPTO 2A. WHAT MUST BE THE SHUNT RESISTANCE TO ENABLE THE AMMETER TO MEASURE CURRENT UPTO 10A? |
| Answer» 25.AN AMMETER OF RESISTANCE 0.8 OHMS CAN MEASURE CURRENT UPTO 2A. WHAT MUST BE THE SHUNT RESISTANCE TO ENABLE THE AMMETER TO MEASURE CURRENT UPTO 10A? | |
| 3312. |
Area of the roti for your cousin is one-fourth the roti for you. What can you say about the ratio of radius of your cousin's rotiradius of your roti? [3 MARKS] |
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Answer» Area of the roti for your cousin is one-fourth the roti for you. What can you say about the ratio of radius of your cousin's rotiradius of your roti? [3 MARKS] |
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| 3313. |
___ quantities have both magnitude and direction. |
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Answer» ___ quantities have both magnitude and direction. |
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| 3314. |
How many faradays/coulombs are required to produce (i)20 g of calcium from molten CaCl2?(ii)40 g of aluminium from molten Al2O3? |
| Answer» How many faradays/coulombs are required to produce (i)20 g of calcium from molten CaCl2?(ii)40 g of aluminium from molten Al2O3? | |
| 3315. |
Gravitational force between two long parallel wires of uniform mass density x1 and x2 present at a distance r from each other. |
| Answer» Gravitational force between two long parallel wires of uniform mass density x1 and x2 present at a distance r from each other. | |
| 3316. |
Prove that for a pulley T1/T2=e^(û*Å) where û is coefficient of friction and Å is angle of wrap. |
| Answer» Prove that for a pulley T1/T2=e^(û*Å) where û is coefficient of friction and Å is angle of wrap. | |
| 3317. |
In a simple electric circuit consisting of a cell, conducting wires, a bulb, and a switch, the switch must be connected very close to the cell; otherwise, it will not work properly. Do you agree? Give reasons. |
| Answer» In a simple electric circuit consisting of a cell, conducting wires, a bulb, and a switch, the switch must be connected very close to the cell; otherwise, it will not work properly. Do you agree? Give reasons. | |
| 3318. |
A car travels first 10 km in 20 minutes and another 10 km in 30 minutes. What is the average speed of the car in m/s? |
| Answer» A car travels first 10 km in 20 minutes and another 10 km in 30 minutes. What is the average speed of the car in m/s? | |
| 3319. |
Question 1 (ii) Classify the following as motion along a straight line, circular or oscillatory motion: (ii) Motion of a horse pulling a cart on a straight road. |
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Answer» Question 1 (ii) |
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| 3320. |
Find the speed.The distance travelled is 200m in 20seconds. |
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Answer» Find the speed. The distance travelled is 200m in 20seconds. |
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| 3321. |
Fill colours in the blank circular shapes to make the whole shape symmetric about the dashed line. a)b) |
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Answer» Fill colours in the blank circular shapes to make the whole shape symmetric about the dashed line. a)  b)  |
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| 3322. |
Stainlesssteel pans are usually provided with copper bottoms. The reason forthis could be that(a) copper bottom makes the pan more durable.(b) such pans appear colourful.(c) copper is a better conductor of heat than the stainless steel.(d) copper is easier to clean than the stainless steel. |
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Answer» Stainless
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| 3323. |
100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be? |
| Answer» 100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be? | |
| 3324. |
two thin aluminium sheets are suspended vertically, a jet of air is blown into the space between them, what will happen?-1) they will come closer to each other, 2) they will move apart, 3) there will be no effect, 4) sheets will be raised up. |
| Answer» two thin aluminium sheets are suspended vertically, a jet of air is blown into the space between them, what will happen?-1) they will come closer to each other, 2) they will move apart, 3) there will be no effect, 4) sheets will be raised up. | |
| 3325. |
What will be the mirror image for the given? |
Answer» What will be the mirror image for the given? |
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| 3326. |
52. A spring block system in horizontal oscillation has a time-period T. Now the spring is cut into four equal parts and the block is re-connected with one of the parts. The new time period of vertical oscillation will b |
| Answer» 52. A spring block system in horizontal oscillation has a time-period T. Now the spring is cut into four equal parts and the block is re-connected with one of the parts. The new time period of vertical oscillation will b | |
| 3327. |
The area of a square is 16 cm2. The area of the rectangle with length equal to double the side of the square and breadth equal to half of the side of the square is ___cm2 |
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Answer» The area of a square is 16 cm2. The area of the rectangle with length equal to double the side of the square and breadth equal to half of the side of the square is |
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| 3328. |
A train travels 40 km at a uniform speed of 30kmh−1. Its average speed for the whole journey after travelling another 40 km is 45kmh−1. Its speed in the second half of the journey is ____. |
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Answer» A train travels 40 km at a uniform speed of 30kmh−1. Its average speed for the whole journey after travelling another 40 km is 45kmh−1. Its speed in the second half of the journey is ____. |
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| 3329. |
Potential difference is applied across the ends of a conductor. Choose the correct statement. |
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Answer» Potential difference is applied across the ends of a conductor. Choose the correct statement. |
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| 3330. |
Which of the following statement(s) is/are true?1. Forces in the same direction add up.2. Two forces in opposite directions result in a net force which is equal to their difference and acts in the direction of the larger force.3. Change in the direction of a force does not change its effect.4. When more than one force is acting on an object, the net effect is due to resultant of all forces. |
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Answer» Which of the following statement(s) is/are true? |
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| 3331. |
Metric system was first introduced in: |
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Answer» Metric system was first introduced in: |
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| 3332. |
Heat is a form of energy. Explain this statement with the help of an example. |
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Answer» Heat is a form of energy. Explain this statement with the help of an example. |
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| 3333. |
a black body at 327 degree centigrade suspended in a black enclosure at 27 degree centigrade cools at certain rate . if temperature of black body is lowered to t degree centigrade so that rate of cooling becoms half of initial value then find approximate value of t in degree centigrade ? |
| Answer» a black body at 327 degree centigrade suspended in a black enclosure at 27 degree centigrade cools at certain rate . if temperature of black body is lowered to t degree centigrade so that rate of cooling becoms half of initial value then find approximate value of t in degree centigrade ? | |
| 3334. |
State three ways of demagnetising a magnet. |
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Answer» State three ways of demagnetising a magnet. |
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| 3335. |
What is the equilibrium constant for the reaction2HBr(g) >H2Br2(g)if 15 ml of H2 th 20 ml of Br2 in one litrereacts WIvessel and at equilibrium 20 ml of HBr is formed?(1) 40(3) 0.125(2) 20 |
| Answer» What is the equilibrium constant for the reaction2HBr(g) >H2Br2(g)if 15 ml of H2 th 20 ml of Br2 in one litrereacts WIvessel and at equilibrium 20 ml of HBr is formed?(1) 40(3) 0.125(2) 20 | |
| 3336. |
Electric current is said to be the flow of _____. |
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Answer» Electric current is said to be the flow of _____. |
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| 3337. |
If a car covers 2/5th of total distance with v1 speed and 3/5th of total distance with v2 speed find the average speed of car |
| Answer» If a car covers 2/5th of total distance with v1 speed and 3/5th of total distance with v2 speed find the average speed of car | |
| 3338. |
How can solar energy be harnessed? Mention any two limitations in using solar energy. How can we overcome these limitations? |
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Answer» How can solar energy be harnessed? Mention any two limitations in using solar energy. How can we overcome these limitations? |
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| 3339. |
Why are the vessels of a solar cooker painted black on the outside? |
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Answer» Why are the vessels of a solar cooker painted black on the outside? |
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| 3340. |
A spring with spring constant k when compressed by 1 cm the potential energy stored is U. If it is further compressed by 3 cm then the change in the potential energy is? |
| Answer» A spring with spring constant k when compressed by 1 cm the potential energy stored is U. If it is further compressed by 3 cm then the change in the potential energy is? | |
| 3341. |
Transverse wave of amplitude 10 cm is generated at one end (x=0) of a long string by a tuning fork of frequency 500 Hz. At a certain instant of time, the displacement of a particle A at x=100 cm is −5 cm and of particle B at x=200 cm is +5 cm. What is the wavelength of the wave ? |
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Answer» Transverse wave of amplitude 10 cm is generated at one end (x=0) of a long string by a tuning fork of frequency 500 Hz. At a certain instant of time, the displacement of a particle A at x=100 cm is −5 cm and of particle B at x=200 cm is +5 cm. What is the wavelength of the wave ? |
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| 3342. |
How many units of heat are there? |
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Answer» How many units of heat are there? |
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| 3343. |
67.The density of water at the surface of ocean is row .If the bulk modulus of water is B,what is the density of ocean water at a depth where the pressure is nP0,where P0 is the atmospheric pressure? (a) rowB/B-(n-1)P0 (b) rowB/B+(n-1)P0 (c) rowB/B-nP0 (d)rowB/B+nP0 |
| Answer» 67.The density of water at the surface of ocean is row .If the bulk modulus of water is B,what is the density of ocean water at a depth where the pressure is nP0,where P0 is the atmospheric pressure? (a) rowB/B-(n-1)P0 (b) rowB/B+(n-1)P0 (c) rowB/B-nP0 (d)rowB/B+nP0 | |
| 3344. |
ntA wire loop os rotated in a magnetic field.The frequency of change in the direction of induced emf is?n |
| Answer» ntA wire loop os rotated in a magnetic field.The frequency of change in the direction of induced emf is?n | |
| 3345. |
From the molar conductivities at infinite dilution |
| Answer» From the molar conductivities at infinite dilution | |
| 3346. |
an object is approaching to a concave mirror with a cons†an t velocity. now comment on the velocity of the image formed. also draw the graph v vs u |
| Answer» an object is approaching to a concave mirror with a cons†an t velocity. now comment on the velocity of the image formed. also draw the graph v vs u | |
| 3347. |
The train covers 20 km in 15 minutes. How much distance will the car cover in 15 minutes if the speed of car is 60% of the speed of the train? |
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Answer» The train covers 20 km in 15 minutes. How much distance will the car cover in 15 minutes if the speed of car is 60% of the speed of the train? |
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| 3348. |
What will happen if the limiting friction is more than the applied force? |
| Answer» What will happen if the limiting friction is more than the applied force? | |
| 3349. |
In which of the following kind of electric circuit the sum total of resistances decreases? |
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Answer» In which of the following kind of electric circuit the sum total of resistances decreases? |
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| 3350. |
24. What is difference between domain and range |
| Answer» 24. What is difference between domain and range | |