電気と磁気(電磁気学) ~ 静電気と電流
電流 (electric current)
$$
I = \frac{q}{t}
$$
I = \frac{q}{t}
$$
I = \frac{q}{t}
$$
I = enSv
$$
I = enSv
$$
I = enSv
オームの法則 (Ohm’s law)
$$
V = RI
$$
V = RI
$$
V = RI
抵抗率 (resistivity)
$$
R = \rho \frac{L}{S}
$$
R = \rho \frac{L}{S}
$$
R = \rho \frac{L}{S}
抵抗の接続
\begin{eqnarray*}
R &=& R_1 + R_2 \ \text{(直列)} \\
\\
\frac{1}{R} &=& \frac{1}{R_1} + \frac{1}{R_2} \ \text{(並列)}
\end{eqnarray*}
R &=& R_1 + R_2 \ \text{(直列)} \\
\\
\frac{1}{R} &=& \frac{1}{R_1} + \frac{1}{R_2} \ \text{(並列)}
\end{eqnarray*}
R &=& R_1 + R_2 \ \text{(直列)}
\frac{1}{R} &=& \frac{1}{R_1} + \frac{1}{R_2} \ \text{(並列)}
電力 (electric power)
$$
P = VI = RI^2 = \frac{V^2}{R}
$$
P = VI = RI^2 = \frac{V^2}{R}
$$
P = VI = RI^2 = \frac{V^2}{R}
ジュール熱 (Joule heat)
$$
Q = Pt = VIt = RI^2 t = \frac{V^2}{R}t
$$
Q = Pt = VIt = RI^2 t = \frac{V^2}{R}t
$$
Q = Pt = VIt = RI^2 t = \frac{V^2}{R}t
電気量 (electric energy)
$$
Q = Pt
$$
Q = Pt
$$
Q = Pt