State and explain Joule's Law of Heating?

Joule’s law is an expression of the rate at which the resistance of a circuit changes electric energy into heat energy. The heat produced due to the flow of this current in an electric wire is represented in Joules.

Joule’s law of heating denotes the connection between heat generated via a conductor by flowing electric current.

Q = I² x R x T

Where Q is the amount of heat
I is the electric current
R is the amount of electric resistance in the conductor
T denotes time

As we know that

V = W/Q ----- (1)

Where

V = Volt
W = Work done
Q = Total charge

From equation 1, we get

W = VQ ----- (2)

Current (I) = Q/T ----- (3)

And

Q = IT ----- (4)

Substituting equation (4) in equation (3) we get

W = VIT ----- (5)

Considering Ohm’s law

V = IR ----- (6)

Now, substituting equation (6) in equation (5) we get

W = IRIT

W = I²RT

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State and explain Joule's Law of Heating?

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CBSE CLASS XII Related Questions

2.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

3.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

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Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

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State and explain Joule's Law of Heating?

Related Questions

CBSE CLASS XII Related Questions

2.Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

3.A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

5.Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
Derive an expression for the capacitance of a parallel plate capacitor of plate area A and plate separation d with air present between the plates.

3.
A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

4.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

5.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?