state joules law and mathematical form of this law
Answers
"Joule's first law" (Joule heating), a physical law expressing the relationship between the heat generated and current flowing through a conductor. Joule's second law states that the internal energy of an ideal gas is independent of its volume and pressure, depending only on its temperature
The joule’s first law shows the relationship between heat produced by a flowing electric current through a conductor.
Q = I2 R T
Where,
Q indicates amount of heat,
I shows electric current
R is the amount of electric resistance in conductor
T denotes time
Answer:
Joule's law is given by: Q = I2Rt Corresponding units: joules(J) = ampere2(A2) · ohm(Ω) · second(s) Where: Q is the heat generated I is the current(constant) R is the resistance of the conductor t is the time The unit of the heat generated is joule, which can be rewritten as: joule = kg · m2 / s2
Explanation:
State Joule’s law of heating and give its mathematical form. An electric iron tak es a current of 5A and develops 1.5 ×104 J of heat energy in 30s. Calculate the resistance of the electric iron
According to the Joule’s law of heating, heat produced in a resistor is directly proportional to the: (i) square of current for a given resistance (ii) resistance for a given current and (iii) the time for which the current flows through the resistor. Mathematical form : H = I2R
Joule's first law" (Joule heating), a physical law expressing the relationship between the heat generated and current flowing through a conductor. Joule's second law states that the internal energy of an ideal gas is independent of its volume and pressure, depending only on its temperature.
A quantitative form of Joule's law is that the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I2R. The power P has units of watts, or joules per second, when the current is expressed in amperes and the resistance in ohms.