## 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

### PHYSICS QUIZ : PHYSICAL WORLD AND MEASUREMENTS PART -1

Q1 Which of the following is a fundamental force of nature

• Tension in the spring
• friction
• restoring force in a stretched spring
• gravitation

gravitation

Q2 Force of friction and tension in a string are

• Weak force
• Electromagnetic force
• Nuclear force
• gravitation

Electromagnetic force

Q3 The process of measurement is basically

• a process of estimation
• a process of comparison
• a process of ease
• none of these

a process of comparison

Q4 The quantity whose unit is treated as derived unit is

• Length
• time
• mass
• speed

Speed

Q5 Which is the unit of a fundamental physical quantity?

• Kg
• m/s
• Kgs
• None of these

Kg

Q6 Characteristic of a standard unit is

• It should not change with time
• It should be well defined
• It should be of suitable size
• all of these

all of these

Q7 Light year is a unit of .

• Time
• Mass
• distance
• all of these

Distance

Q8 Which of the following quantity is measured in kelvin?

• Time
• Mass
• distance
• temperature

temperature

Q9 Which of the following is not a fundamental quantity?

• Time
• Mass
• velocity
• temperature

Velocity

Q10 The SI unit of luminous intensity is

• Second
• Candela
• mole
• m/s

Candela

### PHYSICS QUIZ: PHYSICAL WORLS AND MEASUREMENTS PART-2 TRUE/FALSE

Q1 In SI system there are seven fundamental and two supplementary units.

• True
• False

True

Q2 In MKS system the units of length, mass and time are metre, kilogram and second.

• True
• False

True

Q3 The SI unit of electric current is mole.

• True
• False

False

Q4 Light year is a unit of time.

• True
• False

False

Q5 Momentum is a fundamental physical quantity.

• True
• False

False

Q6 The two masses repel each other due to gravitational force

• True
• False

False

Q7 The electrostatic force between two charges follow inverse square law.

• True
• False

True

Q8 Rocket works on the principle of conservation of momentum

• True
• False

True

Q9 S.I. is not an absolute system of units.

• True
• False

False

Q10 S.I. is accepted by India only.

• True
• False

&nbsFalse;

Q11 Planet is not a astronomical objects

• True
• False

False

Q12 In SI system there are seven fundamental and two supplementary units.

• True
• False

True

### ELECTRIC DIPOLE NOTES: ELECTRIC DIPOLE , DIPOLE LENGTH, ELECTRIC FIELD DUE TO ELECTRIC DIPOLE

Electric Dipole: It is a  system of equal and opposite charges separated by some  fixed distance. DIPOLE LENGTH : the distance AB = 2a is ...