Units and Measurement

The volt (V) is the SI unit of potential difference, defined as one joule per coulomb. Coulomb is the unit of electric charge. Ampere is the unit of electric current. Potential difference measures the work done per unit charge.

Poise is a unit of viscosity.

Centipoise is the standard unit for measuring viscosity, representing a fluid's resistance to flow. It equals 1/100 of a poise, which is the CGS unit for dynamic viscosity. Common liquids like water have low viscosity (around 1 centipoise), while honey has much higher viscosity.

Kilowatt (kW) is the standard unit for measuring power, equal to 1000 watts. Power is the rate at which work is done or energy is transferred. Option C is correct. Force is measured in newtons, work in joules, making options A and B incorrect.

This is the correct option. The SI unit of force is newton (N).

Impulse is defined as the product of force and time (J = F × Δt). Its SI unit is Newton-second (N·s), which is equivalent to kg·m/s. Steradian is a unit for solid angle, and Pascal-sec is not a standard unit for any physical quantity.

Ohm is the SI unit of electrical resistance. Ampere measures electric current, Newton measures force, and Watt measures power. The Ohm symbol is represented by the Greek letter omega.

Correct option is (4).

A fathom is a nautical unit of depth equal to 6 feet (about 1.83 meters). It has been used for centuries to measure water depth for navigation and anchoring. Light years and parsecs measure astronomical distances, while kilometers are metric units.

It is correct as momentum = mass *velocity therefore unit is kg*m/sec, impulse =force*time. Therefore unit = (kg*m/sec*sec)*sec=kg*m/sec.

Yes, all are correct as work done is a product of force exerted on the body and the distance moved by the body in the direction of the force. Its unit is kg*m*m/sec*sec. Kinetic energy is energy associated with motion of a body and is measured in kg*m*m/sec*sec. Potential energy is the energy stored in the body due to its position and is measured in kg*m*m/sec*sec.

The Newton (N) is the SI unit of force, named after Isaac Newton. Joule is the unit of energy/work, second is the unit of time. Force equals mass multiplied by acceleration (F=ma).

The watt (symbol: W) is the SI unit of power, named after James Watt. Power is the rate at which work is done or energy is transferred. Ohm measures electrical resistance, not power.

Bar is a unit of atmospheric pressure. Metric unit of atmospheric pressure equal to 14.50 pounds per square inch (lb/in2), 1.02 kilograms per square centimeter (kg/cm2), 29.53 inches of mercury (in Hg), or 0.9869 atmosphere. In engineering, the term 'bar gauge' (barG) is used to indicate that the pressure is read from a pressure gauge (which actually measures the difference between the fluid's pressure and the atmospheric pressure).

A therm is a unit of heat energy equal to 100,000 British Thermal Units (BTU). It's commonly used in the natural gas and heating industries to measure energy consumption. While watt measures power (rate of energy use), therm specifically measures heat energy.