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11th standard physics Nature of Physical World and Measurement important one mark questions

Published on: 26/04/2019

Download Tamil Nadu 11th Standard Physics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Questions:

Multiple Choice Question

50 x 1 = 50

Fundamental quantities can also be known as________quantities.

(a)

original

(b)

physical

(c)

negative

(d)

base

The comparison of any physical quantity with its standard unit is known as__________

(a)

fundamental quantities

(b)

measurement

(c)

dualism

(d)

derived quantities

If 'a_m' and '\(\triangle a_m\)' are true value and mean absolute error respectively, then the magnitude of the quantity may lie between____________.

(a)

a_m + a_n to a_m - a_n

(b)

a_m-\(\Delta\)a_m to a_m + \(\Delta\)a_m

(c)

2a_m to \(\Delta\)a_m

(d)

0 to 2a_m

If a₁, a₂, a₃.... a_n are the measured value of a physical quantity "a" and a_m is the true value then absolute error___________.

(a)

\(a_m=\triangle a_n+a_n\)

(b)

\(\triangle a_n=a_m+a_n\)

(c)

\(\triangle a_n=a_m-a_m\)

(d)

\(\triangle a_n=a_m-a_n\)

The difference between the true value and the measured value of a quantity is known as________.

(a)

Absolute error

(b)

Relative error

(c)

Percentage error

(d)

Systemmatic error

The uncertainty in a measurement is called as____________.

(a)

error

(b)

systematic

(c)

random error

(d)

gross error

The error caused due to the shear carelessness of an observer is called as____________error.

(a)

Systematise

(b)

Gross

(c)

Random

(d)

Personal

To get the best possible true value of the quantity___________has to be taken.

(a)

rms value

(b)

net value

(c)

arithmetic mean

(d)

mode

Random error can also be called as__________.

(a)

personal error

(b)

chance error

(c)

gross error

(d)

system error

10.

Imperfections in experimental procedure gives______errors.

(a)

random

(b)

gross

(c)

systematic

(d)

personal

11.

Error in the measurement of radius of a sphere is 2%. Then error in the measurement of surface area is___________.

(a)

(b)

(c)

(d)

12.

Zero error of an instrument is a______________.

(a)

Systematic error

(b)

Random error

(c)

Gross error

(d)

Both (a) and (b)

13.

Equivalent of one joule is____________

(a)

Nm²

(b)

kgm²s^-2

(c)

kgms^-1

(d)

Nkgm²

14.

If speed of light (c), acceleration due to gravity (g) and pressure (P) are taken as fundamental units, the possible relation to gravitational constant (G) is ___________________

(a)

c^o g p^-3

(b)

c² g³ p^-2

(c)

c ^o g³ p^-1

(d)

c ² g² p^-2

15.

Dimensions of impulse are _______________

(a)

[ML²T^-1]

(b)

[MLT^-2]

(c)

[MLT^-1]

(d)

[ML²T⁰]

16.

The force F is given by F = at + bt² where t is time. The dimensions of 'a' and 'b' respectively are _____________.

(a)

[M LT^-3] and [MLT^-4]

(b)

[M LT^-4] and [MLT^-3]

(c)

[M LT^-1] and [MLT^-2]

(d)

[M LT^-2] and [MLT^-0]

17.

The product of Avogadro constant and elementary charge is known as __________constant.

(a)

Planck's

(b)

Avagadro

(c)

Boltzmann

(d)

Faraday

18.

The dimensional formula for heat capacity__________________

(a)

[ML²T²]

(b)

[M L² K^-1]

(c)

[M L² T² K^-1]

(d)

[M L² T² K^-1]

19.

In equation of motion S = ut+\(1\over 2\)kt² the dimensional formula for K is______________

(a)

[L T^-1]

(b)

[L T^-2]

(c)

[T]

(d)

[L^-1 T]

20.

Which of the following quantities is expressed as force per unit area?

(a)

Pressure

(b)

Stress

(c)

Both (a) and (b)

(d)

None

21.

Which of the following is having same dimensional formula?

(a)

Work and power

(b)

Radius of gyration and displacement

(c)

Impulse and force

(d)

Frequencies and wavelength

22.

The astronomers used to observe distant points of the universe by_____________.

(a)

Electron telescope

(b)

Astronomical telescope

(c)

Radio telescope

(d)

Radar

23.

The techniques used to study the crystal structure of various rocks are______________.

(a)

diffraction

(b)

interference

(c)

total internal reflection

(d)

refraction

24.

The study of the discrete nature of phenomena at the atomic and subatomic levels _______________.

(a)

Quantum mechanics

(b)

High energy physics

(c)

Acoustics

(d)

Classical mechanics

25.

The study of production and propagation of sound waves_____________.

(a)

Astrophysics

(b)

Acoustics

(c)

Relativity

(d)

Atomic physics

26.

Mass of an electron_______________

(a)

10^-34kg

(b)

9.11\(\times\)10^-34kg

(c)

1.6\(\times\)10^-31kg

(d)

1.6\(\times\)10^-27kg

27.

Mass of observable universe______________.

(a)

10³¹kg

(b)

10⁴¹kg

(c)

10⁵⁵kg

(d)

9.11\(\times\)10³¹kg

28.

The study of forces acting on bodies whether at rest or in motion is______________.

(a)

classical mechanics

(b)

quantum mechanics

(c)

thermodynamics

(d)

condensed matter physics

29.

The word physics is derived from the word____________.

(a)

scientist

(b)

fusis

(c)

fission

(d)

fusion

30.

\(\frac { 1 }{ 12 } \) of the mass of carbon 12 atom is_______________.

(a)

1 TMC

(b)

mass of neutron

(c)

1 amu

(d)

mass of hydrogen

31.

One solar mass is______________.

(a)

2\(\times\)10³⁰kg

(b)

2\(\times\)10³⁰g

(c)

2\(\times\)10³⁰mg

(d)

2\(\times\)10³⁰tonne

32.

One Angstrom is______________.

(a)

10^-9 m

(b)

10^-10 m

(c)

10^-12 m

(d)

10^-15 m

33.

One Fermi is______________.

(a)

10^-9 m

(b)

10^-10 m

(c)

10^-12 m

(d)

10^-15 m

34.

One parsec is_______________.

(a)

3.153\(\times\)10⁷ m

(b)

3.26\(\times\)10¹⁵ m

(c)

30.84\(\times\)10¹⁵ m

(d)

9.46\(\times\)10¹⁵ m

35.

One Astronomical unit is_____

(a)

3.153\(\times\)10⁷ m

(b)

1.496\(\times\)10⁷ m

(c)

9.46\(\times\)10¹² km

(d)

3.26\(\times\)10¹⁵ m

36.

One light year is________________.

(a)

3.153\(\times\)10⁷ m

(b)

1.496\(\times\)10⁷ m

(c)

9.46\(\times\)10¹² km

(d)

3.26\(\times\)10¹⁵ m

37.

One atomus equal to ____________.

(a)

100 ms

(b)

\(\frac { 1 }{ 6.25 } \) ms

(c)

160 ms

(d)

160 ms

38.

The unit of surface tension ______________.

(a)

MT^-2

(b)

Nm^-2

(c)

(d)

Nm^-1

39.

The uncertainty contained in any measurement is__________.

(a)

rounding off

(b)

error

(c)

parallax

(d)

gross

40.

Half life time of a free neutron is in the order of___________.

(a)

10°

(b)

10¹s

(c)

10²s

(d)

10³ s

41.

Time interval between two successive heart beat is in the order of_____________.

(a)

10° s

(b)

10 s

(c)

10² s

(d)

10^-3 s

42.

Size of atomic nucleus is___________.

(a)

10^-10m

(b)

10^-12m

(c)

10^-14m

(d)

10^-18m

43.

The smallest physical unit of time is__________.

(a)

second

(b)

minute

(c)

microsecond

(d)

shake

44.

Chandrasekar limit is___________times the mass of the sun.

(a)

1.2

(b)

1.4

(c)

1.6

(d)

1.8

45.

The shift in the position of an object when viewed with two eyes, keeping one eye closed at a time is known as___________.

(a)

basis

(b)

fundamental

(c)

parallax

(d)

pendulum

46.

Find odd one out_____________.

(a)

Newton

(b)

metre

(c)

candela

(d)

Kelvin

47.

A ratio signal sent towards the distant planet, returns after "t"s. If "c" is the speed of radio waves then the distance of the planet and from the earth is______________.

(a)

\(c\frac{t}{2}\)

(b)

ct²

(c)

2ct

(d)

\(c^2\frac{t^2}{2}\)

48.

The dimensional formula for moment of inertia_______________

(a)

ML⁰T^-2