## Labels

### QUIZ: UNITS AND MEASUREMENTS

Q1 Of the following which is the unit of distance

• parsec
• light year
• astronomical Unit
• All the three

All the three

Q2 One light year is equal to

• 3\times10^{6}
• 4\times10^{8}
• 9.46\times10^{15}m
• 3\times10^{9}

3\times10^{8}

Q3 Who discovered the law of gravitation?

• Newton
• Henry Becquerel
• Pierre Curie
• none of these

Newton

Q4 Which of the following is not a unit of distance?

• Angstrom
• Fermi
• barn
• parsec

barn

Q5 Which one of the following is not a unit of time?

• Lunar month
• solar day
• leap year
• parallactic second

parallactic second

Q6 A dimensionless quantity

• never has a unit
• always has a unit
• may have a unit
• does not exist

may have a unit

Q7 The physical quantity strain has .

• fundamental unit
• Basic unit
• No unit
• No unit

No unit

Q8 Optical fibres are based on

• Total internal reflection
• Refraction
• Dispersion
• polarization

Total internal reflection

Q9 Which of the following is wrongly matched?

• Calorimeter – Humidity
• Coulomb’s law – Charges
• Barometer- Pressure
• Lactometer - Milk

Calorimeter – Humidity

Q10 Strong nuclear force is how many times stronger than Gravitational force

• 10^{28}
• 10^{8}
• 10^{18}
• 10^{38}

10^{38}

Q10 Strongest force in nature is

• Gravitational force
• Electromagnetic force
• Nuclear force
• Weak force

Nuclear force

Q10 Electromagnetic force is

• attractive in nature
• repulsive in nature
• attractive as well as repulsive in nature
• none of these

attractive as well as repulsive in nature