Tag: learning how to measure

Quizzes (4) Questions (71)

Questions Related to learning how to measure

Multiple choice physics learning how to measure measurement of area and volume measurement of volume measurement of area, volume and density

The length, breadth and height of a glass slab are respectively $50 cm$, $20 cm$ and $25 cm$. Find the volume of the slab.

  1. $25 \times 10^3 cm^3$
  2. $5.0 \times 10^3 cm^3$
  3. $2.5 \times 10^2 cm^3$
  4. $5.0 \times 10^2 cm^3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Volume$=$Length$\times$ breadth$\times$ depth

Volume$=50\times20\times25cm^{3}=25000cm^3=25\times10^3 cm^3$

Multiple choice physics learning how to measure measurement of small and large distances measurement of distance unit of fundamental quantities

Which of the following system of units is not based on unit of mass, length and time?

  1. CGS

  2. FPS

  3. MKS

  4. SI
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The SI unit system is not based on only mass, length and time alone. 
This unit system is consists of seven fundamental units which can be given as mass, length, time, temperature, luminous intensity, mole and current.
The correct answer is option $(D)$
Multiple choice physics learning how to measure measurement of small and large distances measurement of distance unit of fundamental quantities

Match the Column I with Column II.

Column I Column II
(A) Distance between earth and sun (p) Micron
(B) Interatomic distance in a solid (q) Fermi
(C) Size of a nucleus (r) Light year
(D) Wavelength of infrared laser (s) Angstrom

  1. A - p, B - q, C - r, D - s

  2. A - r, B - s, C - q, D - p

  3. A - q, B - p, C - s, D - r

  4. A - s. B - r, C - p, D - q
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Distance between earth and sun - Light year
Interatomic distance in a solid - Angstrom
Size of a nucleus - Fermi
Wavelength of infrared laser - Micron

Multiple choice physics learning how to measure measurement of small and large distances measurement of distance unit of fundamental quantities

Match the Column I with Column II

Column I(Physical quantity) Column II(Name of unit)
(A) Conductance (p) gray
(B) Magnetic induction (q) lumen
(C) Absorbed dose (r) tesla
(D) Luminous flux (s) siemens

  1. A - s, B - r, C - p, D - q.

  2. A - p, B - q, C - r, D - s.

  3. A - q, B - p, C - s, D - r.

  4. A - r, B - s, C - p, D - q.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

1) Conductance (G) is reciprocal of resistance (R).

$\therefore G=\dfrac{1}{R}$
$\therefore G=\dfrac{I}{V}$      $\left[\therefore \text{since}\,R=\dfrac{V}{I}\right]$
And its Unit is Siemens (S)
2) When an emf [electromotive force] is induced in a circuit due to change in the magnetic flux associated with the circuit is called Magnetic Induction.
$B=\dfrac{F}{q\,v\,\sin\theta}$
Unit is Tesla
3) Absorbed Dose (D) is the amount of energy abdorbed per unit mass of tissue.
Unit is GRAY (Gy)
4) Luminous flux is the measurement of brightness of a light source in terms of energy emitted.
SI unit is Lumen.

Multiple choice physics learning how to measure measurement of small and large distances measurement of distance unit of fundamental quantities

What is the value of $1 \ m $ in $\mu$ (micron)?

  1. $10^5$
  2. $10^6$
  3. $10^9$
  4. $10^{12}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Answer is B

$1\ m=10^{6}\mu $
The micrometer is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria and is also commonly used in plastics manufacturing.

Multiple choice physics learning how to measure measurement of small and large distances measurement of distance unit of fundamental quantities

$5800 \mathring A$ in nm will be?

  1. 58

  2. 5.8

  3. 580

  4. 0.58
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

We know that $1{\buildrel _{\circ}\over{\mathrm{A}}}=10^{-10} m$

$1$ nanometer or $1\ nm =$$10^{-9}m$
So, we get $1{\buildrel _{\circ}\over{\mathrm{A}}}=0.1 nm$
$5800{\buildrel _{\circ}\over{\mathrm{A}}}=0.1\times 5800\ nm= 580\ nm$

Multiple choice physics learning how to measure measurement of small and large distances measurement of distance unit of fundamental quantities

Convert $1$ $ \displaystyle g/cm^{3} $ to $\displaystyle kg/m^{3} $

  1. 1000

  2. 100

  3. 0.1

  4. 10
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

We know that  $1 \ g = \dfrac{1}{1000} \ kg$
Also,  $1\ cm = \dfrac{1}{100} \ m$
Thus   $1g/cm^3 = 1 \ g\times\dfrac{1  \ kg}{1000 \ g}\times \dfrac{1}{1 \ cm^3}\times \dfrac{(100)^3 \ cm^3}{1 \ m^3} = 1000 \ kg/m^3$