What's inside a capacitor?
2 Answers
The formula for **current (I)** in **amperes (A)** is derived from **Ohm's Law** and is given by:
\[
I = \frac{V}{R}
\]
Where:
- **\( I \)** is the current in amperes (A),
- **\( V \)** is the voltage in volts (V),
- **\( R \)** is the resistance in ohms (Ω).
This means that current is the result of dividing the voltage applied to a circuit by the resistance of that circuit.
In terms of the definition of the ampere, it can also be related to the charge and time:
\[
I = \frac{Q}{t}
\]
Where:
- **\( I \)** is the current in amperes (A),
- **\( Q \)** is the charge in coulombs (C),
- **\( t \)** is the time in seconds (s).
This formula means that 1 ampere is equal to the flow of 1 coulomb of charge per second.
\[
I = \frac{V}{R}
\]
Where:
- **\( I \)** is the current in amperes (A),
- **\( V \)** is the voltage in volts (V),
- **\( R \)** is the resistance in ohms (Ω).
This means that current is the result of dividing the voltage applied to a circuit by the resistance of that circuit.
In terms of the definition of the ampere, it can also be related to the charge and time:
\[
I = \frac{Q}{t}
\]
Where:
- **\( I \)** is the current in amperes (A),
- **\( Q \)** is the charge in coulombs (C),
- **\( t \)** is the time in seconds (s).
This formula means that 1 ampere is equal to the flow of 1 coulomb of charge per second.