InterviewSolution
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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.
| 1. |
Express the following quantities in terms of multiples and submultiples. Length = 0.000000002 m (b) Mass = 2000000 g |
| Answer» (a) Length = `2xx10^(-9)m=2m` (b) Mass = `2xx10^(-6)kg = 2 mug` | |
| 2. |
Convert the unit of ratio `("mass "xx" area")/("volume")` from SI system to CGS system. |
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Answer» Correct Answer - `10 g cm^(-1)` `("Mass"xx"Area")/("Volume")` `=("kg m"^(2))/(m^(3)) = "kg m"^(-1)` Convertion into CGS unit `kg m^(-1)` `=10^(3) g xx (10^(2)cm)^(-1) = 10^(+1) "g cm"^(-1)` |
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| 3. |
The unit of force in SI system is newton (N) and in CGS system is dyne. One newton is equal to 1 kg m `s^(-2)` and 1 dyne is equal to 1 g cm `s^(-2)`. How many dynes make one newton? |
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Answer» Given that: 1 N = 1 kg m `s^(-2)` 1 dyne = 1 g cm `s^(-2)` But 1 kg = 1000 g and 1 m = 100 cm `therefore` 1 N = 1 kg m `s^(-2)` = (1 kg) (1 m `s^(-2)`) `((1 kg)(1 m))/((1 s^(2))) = ((1000 g)(100 cm))/((1 s^(2))) = 10^(5) g cm s^(-2) = 10^(5)` dyne. |
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| 4. |
Area is measured inA. `m^(2)`B. `cm^(2)`C. `mm^(2)`D. All of these |
| Answer» Correct Answer - D | |
| 5. |
Ratio of the SI unit of volume to the SI unit of area is _____. |
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Answer» Correct Answer - Metre `(m^(3))/(m^(2))` = metre |
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| 6. |
When one of the passengers was traveling on a city bus, his mobile phone slipped from his hands and that fell out of the bus through the window. This was observed by a school boy standing on the road. The path of the mobile phone observed by the school boy is____.A. circularB. parabolicC. linearD. elliptical |
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Answer» Correct Answer - B Parabolic Hence, the correct option is (b). |
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| 7. |
What is the SI unit of mass ?A. kgB. gramC. secondD. g `cm^(-3)` |
| Answer» Correct Answer - A | |
| 8. |
Write the correct notation for the following. (a) 2 Kg (b) 4 Newtons (c ) 6 metres (d) 35 Gram (e) 7 S |
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Answer» (a) 2 kg (b) 4 newtons (c ) 6 metres (d) 35 grams (e) 7 s |
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| 9. |
In SI System mass is measured in _____. |
| Answer» Correct Answer - kilogram | |
| 10. |
If the velocity of a body decreases gradually with time, then it is said to be inA. AccelerationB. DecelerationC. RetardationD. Both (b) and (c ) |
| Answer» Correct Answer - D | |
| 11. |
Find the acceleration of the car, if it changes its velocity from `20 m s^(-1)` to `30 ms^(-1)` in 5 seconds. |
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Answer» Correct Answer - `2 m s^(-2)` `a=(v-u)/(t)` `a=(30-20)/(5)=2` `a=2 m s^(-2)` |
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| 12. |
Define motion. |
| Answer» If a body changes its position with reference to its surroundings with time, then the body is said to be in a state of motion. | |
| 13. |
Time is a fundamental quantityA. Since it is independent of other quantities.B. Since it is measured in secondary scale.C. Since it is dependent on other quantities.D. Since it depends on the mass of the clock. |
| Answer» Correct Answer - A | |
| 14. |
Define fundamental unit and write any two examples. |
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Answer» Units of fundamental quantities are called fundamental units. Example: gram, metre |
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| 15. |
Define distance, displacement and speed. |
| Answer» Distance is defined as the length of the actual path travelled by a particle in motion. Displacement is defined as the shortest distance between the initial and final position of a body. Distance travelled by a particle in a unit time is known as speed. | |
| 16. |
When can we say that a particle in motion is moving with uniform speed? |
| Answer» A body or particle is said to be moving with uniform speed, if it travels equal distances in equal intervals of time. | |
| 17. |
Give some examples for fundamental quantities and derived quantities related to motion. |
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Answer» The example for fundamental quantities are distance and time. The example for derived quantities are velocity, acceleration, etc. |
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| 18. |
What are the physical quantities that can be measured in m `s^(-1)`, km and km `h^(-2)`? |
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Answer» Correct Answer - speed and velocity, `ms^(-1)`; Displacement - km; Acceleration - `kmh^(-2)` Speed and velocity can be measured in m `s^(-1)` Displacement and distance can be measured in km. Acceleration is measured in km `h^(-2)` |
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| 19. |
Which of the following unit is a derived unit?A. Cubic metreB. NewtonC. `"Metre"^(2)`D. All of these |
| Answer» Correct Answer - D | |
| 20. |
Categorize the following into fundamental and derived physical quantities. (a) Weight (b) Mass (c ) Density (d) Volume (e) Speed |
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Answer» Fundamental physical quantities: Mass Derived physical quantities: Weight, density, volume, speed. |
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| 21. |
Given the volume of air is `1.29 m^(+3)`. Then express it in c.c. |
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Answer» Correct Answer - `129 xx 10^(4)` C.C. Given the volume of air is 1.29 `m^(+3)` `1.29 m^(3) = 1.29 xx 10^(6) cm^(3) (because 1m = 10^(2) cm)` `=129 xx 10^(4)` C.C. |
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| 22. |
Differentiate between speed and velocity. |
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Answer» (i) Distance covered by the body in unit time is called speed, but displacement of the body in unit time is called velocity. (ii) Speed has no direction but velocity has direction. |
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| 23. |
Express `50^(@)C` in kelvin and Fahrenheit scale temperature. |
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Answer» Correct Answer - 323 K; `122^(@)F` `C = 50^(@)C` K = C + 273 = 50 + 273 = 323 K `F = (9C)/(5) + 32 = (9xx50)/(5) + 32` =`90 + 32` `=122^(@)F` |
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| 24. |
The cotton yielded from the crop of a farmer is given below. Find the average mass of cotton yielded per week. Week 1 - 20 quintals Week 2 - 15 quintals Week 3 - 12 quintals |
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Answer» Aim: To measure the diagonal length of your TV screen in inches. Apparatus: Scale Procedure: Take a metre scale. Measure the length of the diagonal of screen in centimeters. Convert the reading in terms of inches. If 1 inch = _____ centimeters. The diagonal of the screen = _____ cm = _____ inches. |
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| 25. |
Relation between length (l), area (A), volume (V) isA. V = AlB. `V = (A)/(l)`C. l = VAD. `V = Al^(2)` |
| Answer» Correct Answer - A | |
| 26. |
Prefix used for `10^(-3)` isA. MilliB. MicroC. MegaD. Kilo |
| Answer» Correct Answer - A | |
| 27. |
If the length of a square is 2 cm, then its area in SI system isA. 4 `cm^(2)`B. `4 xx 10^(4) m^(2)`C. `4 xx 10^(-4) m^(2)`D. `40 cm^(2)` |
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Answer» Correct Answer - C Area = Length `xx` Length `=2xx10^(-2)xx2xx10^(-2)` `=4xx10^(-4)m^(2)` Hence, the correct option is (c ). |
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| 28. |
Find the time taken by the minutes hand to make a `45^(@)` angle at the centre of the clock. |
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Answer» For `360^(@) rarr` 1 hour For `45^(@) rarr (45)/(360)` hours = `(1)/(8)` hours = `("60 minutes")/(8)` = 7.5 minutes |
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| 29. |
If the angle between the hours hand and minutes hand is around `180^(@)` and the hours hand is midway between 12 and 1, then what is the time shown by the clock? |
| Answer» This is possible only when the hours hand is between 12 and 1, and minutes hand is at 6. So, the time is 12 hours 30 minutes. | |
| 30. |
Prefixes used for negative powers of 10 are calledA. UnitsB. MultiplesC. SubmultiplesD. Standards. |
| Answer» Correct Answer - C | |
| 31. |
Match the following. `{:(,"Column A",,,"Column B"),((A),"Kelvin","( )",(a),"Hotness"),((B),"Time","( )",(b),"Temperature"),((C),"Temperature","( )",(c),"Second"):}` |
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Answer» Correct Answer - A `rarr` b, B `rarr` c, C `rarr` a A `rarr` b, B `rarr` c, C `rarr` a |
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| 32. |
Write the following steps in a sequential order to find the time at a given instant by using a clock. (a) Observe the position of the hour hand. (b) Observe the position of the minute hand. (c ) Multiply 1 hour with the number at which the hour hand is located. (d) Note the number of minutes, considering the gap between two numbers of clocks as 5 minutes. (e) Find the time. |
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Answer» Correct Answer - a, c, b, d, e a, c, b, d, e |
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| 33. |
The angle between the minutes hand and hours hand in a clock, at 12:30 p.m. isA. `gt0^(@)`B. `gt30^(@)`C. `gt60^(@)`D. `gt90^(@)` |
| Answer» Correct Answer - D | |
| 34. |
The short hand of a clock is at 12 and the minutes hand is 3, then the time at that instant is _____. |
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Answer» Correct Answer - 12 : 15 a.m. (or) 12 : 15 p.m. `12:15` am or `12:15` pm or quarter past 12. |
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| 35. |
The least measurement of time in a wall clock is _____. |
| Answer» Correct Answer - 1 second | |
| 36. |
Aishwarya is suffering from fever and her temperature is found to be `39^(@)C`. What is her temperature in Fahrenheit and kelvin scale of temperature? |
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Answer» (i) K = C + 273 = 39 + 273 = 312 K (ii) `(C )/(5) = (F-32)/(9) implies F = ((C xx 9)/(5))+ 32 = ((39xx9)/(5))+ 32 = 102.2^(@)F` |
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| 37. |
Pavan is measuring the area of a leaf by using a graph paper and he measured the sum of the areas of full boxes and more than half boxes inside the outline of the leaf which is 25 `cm^(2)`. Find the length of the square whose area is equal to the area of the leaf. |
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Answer» Area of square = `"Side"^(2)` `25 = "Side"^(2)` `therefore` side = 5 cm |
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| 38. |
On dropping 3 identical bullets into a measuring jar containing a liquid, the level of the liquid increased from `280 cm^(3)` to `316 cm^(3)`. Then the volume of each bullet is _____ `m^(3)`. |
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Answer» Correct Answer - `12 xx 10^(-6) m^(3)` The volume of the 3 bullets = Rise in the water level `= 316 cm^(3) - 280 cm^(3) = 36 cm^(3)` `therefore` The volume of each bullet = `(36)/(3)cm^(3)` `=12 cm^(3) = 12 xx 10^(-6) m^(3)` |
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| 39. |
Compete the following table. `{:(,,"Arrival Time","Time"),("Train","Place","(24-hour clock)","(12-hour clock)"),("Charminar","Secunderabad",18:50,),("Express",,,),("Krishna","Tirupathi",6:30,),("Express",,,):}` |
| Answer» The time 18:50 is expressed as 18:50 in 24-hour clock system and it is expressed as 6:50 p.m. in 12-hour clock system. Time 6:30 is expressed as 6:30 in 24-hour clock system and it is expressed as 6:30 a.m. in 12-hour clock system. | |
| 40. |
The volume of a single liquid drop can be measured using a_____. (a) Measuring jar (b) Measuring flask (c ) Pipette (d) Burette |
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Answer» The volume of a single liquid drop can be measured using a burette. Hence, the correction option is (d). |
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