Part I : A student gives the expression of the time constant of a circuit (R, L): τ = L R (1) We want to check the homogeneity of the term. 1. It gives Ohm's law: U = R.i a) Give the equation to the dimensions of the electric power P, with P = W / t; b) Then give the dimension of R.
Part I : A student gives the expression of the time constant of a circuit (R, L): τ = L R (1) We want to check the homogeneity of the term. 1. It gives Ohm's law: U = R.i a) Give the equation to the dimensions of the electric power P, with P = W / t; b) Then give the dimension of R.
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Part I :
A student gives the expression of the time constant of a circuit (R, L): τ = L
R (1)
We want to check the homogeneity of the term.
1. It gives Ohm's law: U = R.i
a) Give the equation to the dimensions of the electric power P, with P = W / t;
b) Then give the dimension of R.
2. The voltage across an ideal inductor L, traversed by a current of intensity i, is given by:
U = L di
dt . Determine the dimensions of L.
3. Expression (1) is it homogen
Transcribed Image Text:Question IIl:
Part I :
A student gives the expression of the time constant of a circuit (R, L): T = (1)
We want to check the homogeneity of the term.
1. It gives Ohm's law: U = R.i
a) Give the equation to the dimensions of the electric power P, with P = W/ t;
b) Then give the dimension of R.
2. The voltage across an ideal inductor L, traversed by a current of intensity i, is given by:
L di
Determine the dimensions of L.
U
dt
3. Expression (1) is it homogeneous?
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