#### Nature of Physical World and Measurement one mark important questions

11th Standard

Reg.No. :
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Physics

Time : 00:20:00 Hrs
Total Marks : 25
Multiple Choice Questions
25 x 1 = 25
1. The word scientia is meaning to ___________.

(a)

exact

(b)

to know

(c)

control

(d)

implement

2. Astromical Scale is dealt with the _________ Physics

(a)

Mesoscopic

(b)

Microscopic

(c)

Macrospic

(d)

None

3. Microscopic group of Physics dealt with the study of ____________.

(a)

classical physics

(b)

statistical mechanics

(c)

fluid mechanics

(d)

quantum physics

4. Which is deals with the study of materials of an intermediate length scale.

(a)

Macroscopic physics

(b)

Macroscopic physics

(c)

Microscopic physics

(d)

All the above

5. What is the range of astronomical time scales to microscopic scales

(a)

1015S to 10-15S

(b)

109S to 10-18S

(c)

1018S to 10-22S

(d)

1011S to 10-16S

6. The law of electricity and magnetism is used to

(a)

Wireless communication

(b)

Nuclear reactor

(c)

Steam engine

(d)

Aeroplane

7. Match the following:

 (1) Steam engine (a) Bernoulli's principle (2) Nuclear reactor (b) Laws of thermodynamics (3) Production of ultra high magnetic fields (c) Controlled nuclear fission (4) Aeroplane (d) Super Super
(a)
(1) (2) (3) (4)
b c a d
(b)
(1) (2) (3) (4)
d a b c
(c)
(1) (2) (3) (4)c
c d a b
(d)
(1) (2) (3) (4)
b c d a
8. Match the following fundamental forces with respect to relative strengths.

 (1) Gravitational force (a) 1 (2) Electromagnetic force (b) 10-39 (3) Weak nuclear force (c) 10-2 (4) Strong nuclear force (d) 10-13
(a)
(1) (2) (3) (4)
a d b c
(b)
(1) (2) (3) (4)
b c d a
(c)
(1) (2) (3) (4)
c d a b
(d)
(1) (2) (3) (4)
c a b d
9. one parallactic second is,

(a)

3.08 x 1016 m

(b)

1.49 x 1011 m

(c)

9.46 x 1015 m

(d)

1.66 x 10-27 m

10. How many light years make 1 parsec?

(a)

3.26

(b)

6.67

(c)

1.5

(d)

9.4

11. How many AU makes one metre?

(a)

3.26 x 1011AU

(b)

1.496 x 1011AU

(c)

3.08 x 1016 AU

(d)

6.684 x 10-12AU

12. What is the value of one light year in tera metre?

(a)

9.46 x 106Tm

(b)

9.46 x 109Tm

(c)

9.46 x 102Tm

(d)

9.46 x 103Tm

13. The accleration of 20 m/s2 in km/h2 is

(a)

2.59 x 105 km/h2

(b)

1.29 x 105 km/h2

(c)

2.0 x 103 km/h2

(d)

3.5 x 105 km/h2

14. Which device is used for measuring the mass of atoms?

(a)

Spectragraph

(b)

Fermi

(c)

Telescope

(d)

Microscope

15. Which of the following statement is wrong?

(a)

one fenni = 1015 m

(b)

All non-zero digits are significant.

(c)

1 AU = 1.496 x 1011 m

(d)

Speed is a derived unit

16. Which of the following Statement is true?

(a)

Velocity is a fundamental unit

(b)

Solar day = 24 hours.

(c)

1 Shake = 104s

(d)

mass is a derived unit

17. The number of significant figures in 0.0006012 m is

(a)

3

(b)

4

(c)

7

(d)

5

18. The number of significant figures in 2.64 x 104 kg is

(a)

2

(b)

4

(c)

5

(d)

3

19. If E & B respectively, represent electric field and magnetics induction field, then the ratio E & B has the dimensions of

(a)

angle

(b)

acceleration

(c)

velocity

(d)

displacement

20. If force |F|, velocity I'VI and time |T| are taken as to fundamental units then the dimensions of mass are

(a)

FV-1T

(b)

FV-1T

(c)

FVT-1

(d)

FVT-2

21. The dimensions of K.E. is

(a)

M2L2T-1

(b)

M1L1T1

(c)

M1L2T-2

(d)

M2L2T-2

22. The dimensions of universal gravitational constant is

(a)

M2L3T-2

(b)

M2L2T-1

(c)

M2L3T-1

(d)

ML2T-1

23. The density of a cube is measured by measuring its mass and length of its side. If the maximum error in the measurement of mass and length are 5% and 3%. respectively, the maximum error in the measurement of density is

(a)

9%

(b)

8%

(c)

14%

(d)

2%

24. The fractional error $\left( {{\triangle x}\over{x}} \right)$

(a)

$\pm\left( {{\triangle x}\over{x}} \right)$

(b)

$\pm n\left( {{\triangle a}\over{a}}\right)$

(c)

$\pm n \log_e \left( {{\triangle a}\over{a}}\right)$

(d)

$\pm n \log_{10}{{\triangle a}\over{a}}$

25. 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