SI Units — Set 5
Physics · SI इकाइयां · Questions 41–50 of 60
In the SI system, area is measured in _____.?
Correct Answer: D. Square meter
The square meter is the SI derived unit for area. It is defined as the area of a square with sides of one meter. It is used for all standard scientific measurements of surface space.
The SI unit for volume is the _____.?
Correct Answer: D. Cubic meter
The cubic meter is the SI derived unit for volume. While the liter is commonly used, it is not the primary SI unit. One cubic meter is equal to exactly 1,000 liters.
What is the SI unit of velocity?
Correct Answer: A. Meter per second
Meter per second is the SI derived unit for both speed and velocity. It represents the distance traveled in meters per unit of time in seconds. Velocity is a vector quantity that includes direction.
The SI unit of acceleration is _____.?
Correct Answer: A. Meter per second squared
Meter per second squared is the SI unit for acceleration. It measures the change in velocity per unit of time. The acceleration due to gravity on Earth is approximately 9.8 meters per second squared.
Which of the following is the SI unit of density?
Correct Answer: D. Kilogram per cubic meter
Kilogram per cubic meter is the standard SI unit for density. It represents the mass of a substance contained in a unit volume. Pure water has a density of approximately 1,000 kilograms per cubic meter.
The SI unit of momentum is _____.?
Correct Answer: C. Kilogram-meter per second
Kilogram-meter per second is the SI unit for linear momentum. Momentum is the product of an object's mass and its velocity. It is a conserved quantity in closed systems.
What is the SI unit of impulse?
Correct Answer: C. Newton-second
The newton-second is the SI unit for impulse. Impulse is the change in momentum resulting from a force applied over a time interval. It has the same dimensions as momentum.
The prefix 'mega' in SI units represents which factor?
Correct Answer: A. 10^6
The prefix 'mega' signifies a factor of one million or 10^6. It is commonly used in units like megawatt or megahertz. It is denoted by the capital letter M.
The prefix 'nano' in SI units represents which factor?
Correct Answer: B. 10^-9
The prefix 'nano' represents a factor of one-billionth or 10^-9. It is used to describe very small scales, such as nanotechnology. It is denoted by the lowercase letter n.
How many base units are there in the International System of Units (SI)?
Correct Answer: A. Seven
There are exactly seven base units in the SI system. These include the meter, kilogram, second, ampere, kelvin, mole, and candela. All other SI units are derived from these seven.