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#### Chapter-1 most important one mark questions

11th Standard

Reg.No. :
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Physics

Answer each of the following questions
Time : 00:30:00 Hrs
Total Marks : 30

Part A

30 x 1 = 30
1. Find the value of one Au in 1000km

(a)

1.5 x 105m

(b)

2.5 x 106m

(c)

1.5 x 1011m

(d)

2.5 x 1010m

2. How many AU present in one light year?

(a)

6.30 x 104m

(b)

9.46 x 1015m

(c)

6.2 x 102m

(d)

9.4 x 1016m

3. How many um present in one metre?

(a)

10-6 $\mu$ m

(b)

106 $\mu$ m

(c)

10-3 $\mu$ m

(d)

10-2 $\mu$ m

4. The speed of an object v = 40 ms-1. The same quantity of speed in kmh-1 is,

(a)

60

(b)

160

(c)

40

(d)

144

5. The speed of an object v = 90km/h. The same quantity of speed in m/s is

(a)

90

(b)

25

(c)

45

(d)

180

6. 3.5 kg mass of a metal plate has the volume of 1.5 m3. Find the density of metal plate.

(a)

1.5 kg/m3

(b)

2.3 kg/m3

(c)

3.4 kg/m3

(d)

4.8 kg/m3

7. The value of 1° is,

(a)

(b)

(c)

(d)

8. How many parsec are there in one kilometer?

(a)

3.084 x 10-16

(b)

3.084 x 108

(c)

3.24 x 10-14

(d)

None

9. The angle of an object is 18.2°. What is the angular diameter of the object in radians?

(a)

(b)

(c)

(d)

10. If a circle with 10 m radius and angle 60° at centre, then what will be the length of arc?

(a)

5.24m

(b)

6.21m

(c)

7.1 mm

(d)

10m

11. The mass of an iron sheet is 0.250 kg and volume of the sheet is 1.5m3 Then what is the density of the iron sheet? Express the result in SI unit system.

(a)

0.267kg m-3

(b)

0.167 kg m-3

(c)

0.255 kg m-3

(d)

0.285 kg m-3

12. What is the SI unit of linear momentum?

(a)

ms-1

(b)

ms-2

(c)

kg ms-1

(d)

kg m2 ms-1

13. What is the SI unit of Area?

(a)

m

(b)

m2

(c)

Nm-1

(d)

cm-1

14. SI unit of the universal constant of gravitation (G) is,

(a)

kg-2 m-2

(b)

kg ms-1

(c)

Nm2 kg-2

(d)

Nm-1

15. A scientific way of doing things involve:

(a)

identifying the problem

(b)

collecting data

(c)

controlled experimentation

(d)

all the above

16. The word physics is derived from:

(a)

to know

(b)

fusis

(c)

knowing the truth

(d)

prediction

17. Which of the following is true regarding the physical science?

(a)

dealing with non-living things

(b)

dealing with living things

(c)

study with atomic level

(d)

both (a) and (b)

18. The term used to mention study of macroscopic system to microscopic constituents is

(a)

unification

(b)

macrocosm

(c)

reductionism

(d)

microcosm

19. The branch of physics deals with the relation between space, time and energy are:

(a)

astrophysics

(b)

relativity

(c)

acoustics

(d)

atomic physics

20. The fraction of$1\over 273.16$ temperature of the triple point of water represents:

(a)

celsius

(b)

fahrenheit

(c)

(d)

kelvin

21. Which of the following is the fundamental quantity?

(a)

Area

(b)

Density

(c)

Volume

(d)

Mass

22. Which of the following is wrong matched?

(a)

Chemistry - arrange elements in periodic table

(b)

Geology - crystal structure of various rocks

(c)

Oceanography - movements of neurotransmitters

(d)

Biology - electron microscope

23. ___________ system of units was accepted by the scientists of the general conference on weights and measures.

(a)

FPS

(b)

CGS

(c)

MKS

(d)

SI

24. A source having luminous intensity of one candela emits monochromatic radiation of frequency:

(a)

5.4X1014Hz

(b)

54x1014 Hz

(c)

4.5x1014 Hz

(d)

${1\over683}Hz$

25. When a current of 1 ampere flowing through two parallel straight conductors. What amount of force per unit length acts between the conductors?

(a)

1 x 1O-7N

(b)

2 x 1O-7N

(c)

3 x 107N

(d)

4 x 1O-7N

(a)

10-18

(b)

10-12

(c)

10-6

(d)

10-24

27. The value of one Angstrom is

(a)

1010m

(b)

10-10m

(c)

10-8m

(d)

10-15m

28. The prefix of 10-18 is

(a)

femto

(b)

nano

(c)

giga

(d)

atto

29. Femto is equal to:

(a)

10-6m

(b)

10-13m

(c)

10-15m

(d)

10-12m

30. Universal time is based on:

(a)

rotation of the earth on its own axis

(b)

earth's orbital motion around the sun

(c)

vibration of cesium atom

(d)

oscillation of quartz clock