In International System of units (S.I) number of supplementary units is-
(a) 2
(b) 3
(c) 4
(d) 5
In International System of Units (SI) has two supplementary quantities (a) Plane angle:Measured in radians (rad) and (b) Solid angle: Measured in steradians (sr).
The only vector quantity among the following is-
(a) Electric charge
(b) Electric field intensity
(c) Electric potential
(d) Electric resistance
Vectors are quantities that are described by both a magnitude and a direction e.g- electric field intensity, gravitational force, velocity etc.
Mass of a body is defined by the following quantity-
(a) Velocity/acceleration
(b) Applied force/acceleration
(c) Applied force/velocity
(d) Applied force/increase in momentum
Mass of a body is a scalar quantity, whereas its weight is a vector quantity
Which one of these is not a measuring instrument?
(a) Picometer
(b) Barometer
(c) Thermometer
(d) Hygrometer
A picometer (pm) is a unit of length in the metric system that is equal to one trillionth of a meter.
An example of a scalar quantity is-
(a) Velocity
(b) Force
(c) Energy
(d) Momentum
Scalars are quantities that are fully described by a numerical value e.g-Energe, Mass, Charge, Volume, Speed, Electric charge, Electric resistance etc.
Which of the following not a unit of lenth?
(a) Lighth year
(b) Radian
(c) AU
(d) Micron
The radian is the unit of angular measure.
Dyne/sec. stands for the unit of-
(a) Force
(b) Energy
(c) Momentum
(d) Power
Dyne/sec is the unit of momentum.
Among the following select the odd one-
(a) Acre
(b) Meter
(c) Furlong
(d) Mile
The Acre is a unit of land area, Where Mile, Meter, Furlong are unit of lenght.
1 nm is equivalent to-
(a) 10mm
(b) 10 A
(c) 100 A
(d) 0.01mm
One nanometer (nm) is equivalent to Ten angstroms (Å).
Light year is unit of-
(a) Time
(b) Light
(c) Distance
(d) Intensity of light
The Light-year is a unit of length/distance used to express astronomical distances and is equivalent to about 9.46 trillion kilometres.
Nuclear sizes are expressed in a unit named-
(a) Angstrom
(b) Fermi
(c) Newton
(d) Tesla
Nuclear sizes are expressed in a unit called the Fermi, which is equal to one femtometer (1 fm) or 10−15 meters.
Identify the vector quantity from the following-
(a) Work
(b) Heat
(c) Time
(d) Angular momentum
Vectors are quantities that are described by both a magnitude and a direction e.g- Work, gravitational force, velocity etc.
Which of the following is a scalar quantity?
(a) Momentum
(b) Mass
(c) Force
(d) Velocity
Scalars are quantities that are fully described by a numerical value e.g-Energe, Mass, Charge, Volume, Speed, Electric charge, Electric resistance etc.
What is an example of a vector quantity?
(a) Mass
(b) Temperature
(c) Lenth
(d) Velocity
Vectors are quantities that are described by both a magnitude and a direction e.g- Velocity, electric field intensity, gravitational force, velocity.
Which of the following is not a fundamental quantity
(a) Speed
(b) Mass
(c) Temperature
(d) Length
(a) Speed
The physical quantities which do not depend upon other physical quantities are called fundamental or base physical quantities e.g-Mass,Lenght, Time, Temperature, Time, Luminous intensity, Amount of substance.
Which one of these is the system of unit-
(a) SMS System
(b) MKP System
(c) FPS System
(d) CJS System
The common system of units are MKS System, CGS System, FPS System, SI System etc.
In SI system the fundamental units are-
(a) meter, kilogram, second, coulomb, Kelvin, mole and candela.
(b) meter, kilogram, second, ampere, Kelvin, mole and candela.
(c) meter, Newton, second, ampere, Kelvin, mole and candela.
(d) meter, kilogram, second, ampere, Kelvin, mole and Ohm.
(b) meter, kilogram, second, ampere, Kelvin, mole and candela.
1 Nanometer = _________.
(a) 1/10⁻⁸m
(b) 1/10⁻⁹m
(c) 1/10⁹m
(d) 1/10⁸m
1 Nanometer is equivalent to 1/10⁹m or 10⁻⁹m.
One picometer is equal to-
(a) 10¹²m
(b) 10⁻¹¹m
(c) 10⁻¹²m
(d) 10¹¹m
A picometer (pm) is a unit of length in the metric system that is equal to one trillionth of a meter or 10¹²m.
One micron = ___________ cm.
(a) 0.001
(b) 0.0001
(c) 0.01
(d) 0.00001
1 Microne= 10⁻⁶m, or 1/10⁴= 0.0001 cm.
Which instrument is used to observe the Sun?
(a) Telescope
(b) Sun meter
(c) Helioscope
(d) stroboscope
A helioscope is an instrument used for observing the sun and sunspots. The helioscope was first used by Benedetto Castelli and refined by Galileo Galilei.
Odometer is a device used to measure ___________ in vehicles.
(a) Direction
(b) Smell
(c) Distance
(d) Speed
An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car.
Which of the following instruments is used to measure atmospheric pressure?
(a) Barometer
(b) Thermometer
(c) Odometer
(d) Tetrameter
A barometer is a scientific instrument used to measure atmospheric pressure. It is also called barometric pressure.
A parsec, a unit of distance used to measure the distance related to the stars in the sky, is equal to-
(a) 3.26 light years
(b) 4.50 light years
(c) 3.05 light years
(d) 4.25 light years
The parsec (pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (AU).
What is measured in Cusec?
(a) Purity of water
(b) Flow of water
(d) Quantity of water
(c) Depth of water
Cusec is a unit of measurement for the rate of flow of water.
Pyrometer is used to measure-
(a) Air pressure
(b) Humidity
(c) Density
(d) High temperature
Pyrometer, device for measuring relatively high temperatures.
The apparatus used to measure the intensity of light is known as-
(a) Luxmeter
(b) Anemometer
(c) Altimeter
(d) Lactometer
Lux meters also known as a photometer, is a device that used for measuring brightness in lux, fc or cd/m².
Fathometer is used to measure-
(a) Rain
(b) Sound intensity
(c) Depth of sea
(d) Earthquake
A fathometer is a device that uses echo sounding to measure the depth of the ocean or any other water bodies.
Phyrheliometer is used for measuring-
(a) Sun spots
(b) Solar radiations
(c) Air temperatures
(d) Temperature of planets
A pyrheliometer is a device that measures the amount of solar radiation that directly reaches the Earth's surface.
Ampere is the unit of-
(a) Voltage
(b) Power
(c) Electric current
(d) Resistance
The ampere, or amp, is the International System of Units (SI) unit for electric current. It measures the amount of electric charge that moves per unit of time.