- A. CGS
- B. MKS
- C. FPS
- D. SI
(c) FPS
(c) FPS
- A. Base
- B. Supplementary
- C. Derived
- D. professional
(a) Base
(a) Base
- A. Celsius
- B. Fahrenheit
- C. kelvin
- D. Ampere
(c) kelvin
(c) kelvin
- A. Directly proportional to the number of atoms
- B. Inversely proportional to the number of atoms
- C. Directly proportional to the square of number of atoms
- D. Inversely proportional to the square of number of atoms
(a) directly proportional to the number of atoms
(a) directly proportional to the number of atoms
- A. Laser light
- B. UV light
- C. Visible light
- D. IR light
(c) visible light
(c) visible light
- A. International system of units
- B. Integrated System of units
- C. International symbol of units
- D. Integrated symbol of units
(a) International system of units
(a) International system of units
- A. Accuracy
- B. Precision
- C. Error
- D. Approximation
(b) Precision
(b) Precision
- A. Supplementary quantities
- B. Derived quantities
- C. Professional quantities
- D. Energy quantities
(b) Derived quantities
(b) Derived quantities
- A. Approximation gives accurate value.
- B. Approximation simplifies the calculation.
- C. Approximation is very useful when little information is available.
- D. Approximation gives the nearest value only.
(a) Approximation gives accurate value.
(a) Approximation gives accurate value.
Steradian
Scientists
Temperature
Ammeter
One mole
Solid angle
Electronic
Error
Accuracy
plane angle
Steradian
Scientists
Temperature
Ammeter
One mole
Solid angle
Electronic
Error
Accuracy
plane angle
False
Correct statement:
Temperature is a measure of average kinetic energy of the particles in a system.
False
Correct statement:
Temperature is a measure of average kinetic energy of the particles in a system.
False
Correct statement:
One coulomb of charge flowing per second is called ‘ampere’.
False
Correct statement:
One coulomb of charge flowing per second is called ‘ampere’.
True
True
True
True
True
True
False
Correct statement:
Atomic clocks are used in GPS Devices.
False
Correct statement:
Atomic clocks are used in GPS Devices.
True
True
(b) Both assertion and reason are true but reason is not the correct explanation of the assertion
Correct explanation :
In SI system the units are precisely defined and have the same value everywhere.
(b) Both assertion and reason are true but reason is not the correct explanation of the assertion
Correct explanation :
In SI system the units are precisely defined and have the same value everywhere.
(a) Both assertion and reason are true and reason is the correct explanation of the assertion
(a) Both assertion and reason are true and reason is the correct explanation of the assertion
(d) Assertion is false, but reason is true]
Correct explanation :
Radian is the unit of plane angle.
(d) Assertion is false, but reason is true]
Correct explanation :
Radian is the unit of plane angle.
Seven.
Seven.
Thermometer.
Thermometer.
32°F.
32°F.
Candela (cd).
Candela (cd).
Periodic vibrations.
Periodic vibrations.
Analog clock and digital clock.
Analog clock and digital clock.
One time.
One time.
60 minutes = 1 hr
1 minute = \(\frac { 1 }{ 60 }\) = 0.0167 hours.
60 minutes = 1 hr
1 minute = \(\frac { 1 }{ 60 }\) = 0.0167 hours.
Some common systems of units are:
FPS – System (Foot for length, Pound for mass and Second for time)
CGS – System (Centimetre for length, Gram for mass and Second for time)
MKS – System (Metre for length, Kilogram for mass and Second for time)
Some common systems of units are:
FPS – System (Foot for length, Pound for mass and Second for time)
CGS – System (Centimetre for length, Gram for mass and Second for time)
MKS – System (Metre for length, Kilogram for mass and Second for time)
One ampere is defined as one ‘coulomb’ of charge moving in a conductor in one second.
One ampere is defined as one ‘coulomb’ of charge moving in a conductor in one second.
The magnitude of an electric current is the amount of electric charges flowing through a conductor in one second.
The magnitude of an electric current is the amount of electric charges flowing through a conductor in one second.
The measure of the power of the emitted light, by a light source in a particular direction, per unit solid angle is called as luminous intensity.
The measure of the power of the emitted light, by a light source in a particular direction, per unit solid angle is called as luminous intensity.
Mole is defined as the amount of substance, which contains 6.023 x 10 23 entities.
Mole is defined as the amount of substance, which contains 6.023 x 10 23 entities.
Difference between Plane Angle and Solid Angle:
Plane Angle:
Angle between the intersection of two lines or planes.
It is two dimensional
Unit is radian.
Solid Angle:
Angle between the intersection of three or more planes at a common point.
It is three dimensional.
Unit is steradian.
Difference between Plane Angle and Solid Angle:
Plane Angle:
Angle between the intersection of two lines or planes.
It is two dimensional
Unit is radian.
Solid Angle:
Angle between the intersection of three or more planes at a common point.
It is three dimensional.
Unit is steradian.
Base Quantities and Units:
Base Quantities and Units:
Types of clocks based on display:
Analog clocks
Digital clocks
1. Analog clocks:
It looks like a classic clock. It has three hands to show the time.
Hours Hand : It is short and thick. It shows ‘hour’.
Minutes Hand : It is long and thin. It shows ‘minute’.
Seconds Hand : It is long and very thin. It shows ‘second’. It makes one rotation in one minute and 60 rotations in one hour.
Analog clocks can be driven either mechanically or electronically.
2. Digital clocks:
A digital clock displays the time directly. It shows the time in numerals or other
symbols. It may have a 12 hours or 24 hours display.
Recent clocks are showing Date, Day, Month, Year, Temperature etc.
Digital clocks are often called as Electronic Clocks.
Différent types of clocks based on working mechanism:
1. Quartz Clock:
These clocks are activated by ‘electronic oscillations’, which are controlled by a ‘quartz crystal’.
The frequency of a vibrating crystal is very precise. So, the quartz clock is more accurate than the mechanical clock.
These clocks have an accuracy of one second in every 10 9 seconds.
2. Atomic Clock:
These clocks are making use of periodic vibrations occurring within the atom.
These clocks have an accuracy of one second in every 10b seconds.
Atomic clocks are used in Global Positioning System (GPS), Global Navigation Satellite System (GLONASS) and International time distribution services.
Types of clocks based on display:
Analog clocks
Digital clocks
1. Analog clocks:
It looks like a classic clock. It has three hands to show the time.
Hours Hand : It is short and thick. It shows ‘hour’.
Minutes Hand : It is long and thin. It shows ‘minute’.
Seconds Hand : It is long and very thin. It shows ‘second’. It makes one rotation in one minute and 60 rotations in one hour.
Analog clocks can be driven either mechanically or electronically.
2. Digital clocks:
A digital clock displays the time directly. It shows the time in numerals or other
symbols. It may have a 12 hours or 24 hours display.
Recent clocks are showing Date, Day, Month, Year, Temperature etc.
Digital clocks are often called as Electronic Clocks.
Différent types of clocks based on working mechanism:
1. Quartz Clock:
These clocks are activated by ‘electronic oscillations’, which are controlled by a ‘quartz crystal’.
The frequency of a vibrating crystal is very precise. So, the quartz clock is more accurate than the mechanical clock.
These clocks have an accuracy of one second in every 10 9 seconds.
2. Atomic Clock:
These clocks are making use of periodic vibrations occurring within the atom.
These clocks have an accuracy of one second in every 10b seconds.
Atomic clocks are used in Global Positioning System (GPS), Global Navigation Satellite System (GLONASS) and International time distribution services.
No. It is not possible of 100°C fever. The normal temperature of human body is between 98.4°F and 98.6°F.
So, he should say that, he was affected by a fever of 100°F and it is not 100°C.
No. It is not possible of 100°C fever. The normal temperature of human body is between 98.4°F and 98.6°F.
So, he should say that, he was affected by a fever of 100°F and it is not 100°C.