Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s) . The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s).
What is current formula?
The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R . The SI unit of current is Ampere (Amp).
What is the formula for calculating the power?
Power equals work (J) divided by time (s) . The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in a unit called the horsepower. One horsepower is the amount of work a horse can do in 1 minute, which equals 745 watts of power.
What is the formula of work done?
To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ .
How do you find power?
Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s) . The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s).
What is Ohm’s law state?
Ohm’s law, description of the relationship between current, voltage, and resistance. The amount of steady current through a large number of materials is directly proportional to the potential difference, or voltage, across the materials. ... Ohm’s law may be expressed mathematically as V/I = R .
What is SI unit current?
ampere . The ampere , symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 x 10 – 19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of Δν Cs .
What is Ampere formula?
Since power is defined as the product of current and voltage, the ampere can alternatively be expressed in terms of the other units using the relationship I = P/V, and thus 1 A = 1 W/V . Current can be measured by a multimeter, a device that can measure electrical voltage, current, and resistance.
What is work done SI unit?
The SI unit of work is the joule (J) , which is defined as the work done by a force of one newton moving an object through a distance of one meter.
What is formula for mass?
Mass is always constant for a body. One way to calculate mass: Mass = volume × density . Weight is the measure of the gravitational force acting on a mass.
What is work and its types?
Work is a scalar quantity and is the product of two vector quantities. Depending on the value of q, there are three types of work: When q = 0°, work is said to be positive . Stretching of the spring is an example of positive work as the force is acting in the direction of displacement of the spring.
What is Ohm’s law answer?
: a law in electricity: the strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit .
What is Watt’s law?
Watt’s Law states that: Power (in Watts) = Voltage (in Volts) x Current (in Amps) P = V I Combining with Ohm’s law we get two other useful forms: P = V*V / R and P = I*I*R Power is a measurement of the amount of work that can be done with the circuit, such as turning a motor or lighiting a light bulb.
What is Ohm’s law diagram?
Ohm’s law states that under constant temperature, the current passing through conductor is directly proportional to potential difference applied across it .
Is SI an unit?
The International System of Units (SI, abbreviated from the French Système international (d’unités)) is the modern form of the metric system . It is the only system of measurement with an official status in nearly every country in the world. ... Twenty-two derived units have been provided with special names and symbols.
How SI units are defined?
It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299792458 when expressed in the unit m s − 1 , where the second is defined in terms of ∆ν Cs .” ... “The kilogram, symbol kg, is the SI unit of mass.
