Electric Power Formula V = IR Where, R is the resistance in the circuit. V is the potential difference in the circuit. I is the electric current.
What are the 3 forms of Ohm’s law?
3-4: A circle diagram to help in memorizing the Ohm’s Law formulas V = IR, I = V/R, and R= V/I.
What are the 3 formulas for power?
- P = E t.
- P = W t.
- P = V 2 R.
What is emf unit?
What is the unit of EMF? The unit for electromotive force is Volt. EMF is numerically expressed as the number of Joules of energy given by the source divided by each Coulomb to enable a unit electric charge to move across the circuit.
What is electric force?
How would you define an electrical force? The repulsive or attractive interaction between any two charged bodies is called as electric force. Similar to any force, its impact and effects on the given body are described by Newton’s laws of motion. The electric force is one of the various forces that act on objects.
What does v IR mean?
Ohm’s Law is V = IR, where V = voltage, I = current, and R = resistance. Ohm’s Law allows you to determine characteristics of a circuit, such as how much current is flowing through it, if you know the voltage of the battery in the circuit and how much resistance is in the circuit. Created by Sal Khan.
What are the 4 formulas of motion?
The equations are as follows: v=u+at,s=(u+v2)t,v2=u2+2as,s=ut+12at2,s=vt−12at2.
What is the most famous physics formula?
The equation E = Mc2 is perhaps the most famous equation of twentieth- century physics. It is a statement that mass and energy are two forms of the same thing, and that one can be converted into the other (ibid., p.
What is E Mc2 used for?
E = mc2, equation in German-born physicist Albert Einstein’s theory of special relativity that expresses the fact that mass and energy are the same physical entity and can be changed into each other.
What is flux density formula?
Electric flux density is equal to the electric field strength times the absolute permittivity of the region where the field exists. Electric flux density formula, D = ε E where, D is the electric flux density, ε is the electric permittivity, E is the electric field strength.
What is the formula of flux intensity?
Flux Density (B) is related to Magnetic Field (H) by B=μH. It is measured in Webers per square meter equivalent to Teslas [T]. The total number of magnetic field lines passing through a given area normally is called magnetic flux.
What is Q in magnetic field?
The equation is given by F = q v × B or F = qvB sin θ, where q is the charge, B is the magnetic field, v is the velocity, and θ is the angle between the directions of the magnetic field and the velocity; thus, using the definition of the cross product, the definition for the magnetic field is.
What is Watt’s law?
Watt’s law defines the relationship between power, amperage, and voltage drop in an electrical circuit. Watts Law also states that the power of an electrical circuit is the product of its voltage and current.
Which is the unit for current?
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 ΔνCs.
What is the units of voltage?
Volt. The volt is the unit of electric potential difference—electric potential difference is also known as voltage. The size of 1 volt is officially defined as the potential difference between two points of a wire carrying a current of 1 ampere when the power dissipated in the wire is 1 watt.
How do I calculate voltage?
- To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
- To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
- To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
- To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)
How is DC current calculated?
P = V X I . Here P is power in watts. V is voltage in volts. I is current in amps.
What is the formula of current?
Ohm’s law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR. An alternative statement of Ohm’s law is I = V/R.
Is ohm’s law is universal law?
No. Ohm’s law is not a universal law. This is because Ohm’s law is only applicable to ohmic conductors such as iron and copper but is not applicable to non-ohmic conductors such as semiconductors.
Why emf is called force?
Electromotive force (EMF) is a voltage developed by any source of electrical energy such as a battery or photovoltaic cell. The word “force” is somewhat misleading, because EMF is not a force, but rather a “potential” to provide energy.
What is resistance unit?
The unit of the electrical resistance, measured with direct current, is the ohm (abbreviated Ω), named after the German physicist and mathematician Georg Simon Ohm (1789-1854). According to ohm’s law, the resistance R is the ratio of the voltage U across a conductor and the current I flowing through it: R = U / I.
What is r in coulomb’s law?
r is the shortest distance between the charges (in m), ke is the Coulomb’s constant. It is equal to 8.98755 × 10⁹ N·m²/C² .
Which force is the strongest?
The strong nuclear force, also called the strong nuclear interaction, is the strongest of the four fundamental forces of nature. It’s 6 thousand trillion trillion trillion (that’s 39 zeroes after 6!)
What is Column law?
: a statement in physics: the force of attraction or repulsion acting along a straight line between two electric charges is directly proportional to the product of the charges and inversely to the square of the distance between them.
What is K in Ohm’s law?
For most electronic circuits the amp is too large and the ohm is too small, so we often measure current in milliamps (mA) and resistance in kilohms (k ).