Physics
Physics
Problem
Identify the circuit element represented by a resistor symbol with a diagonal arrow drawn through it.Intuitive explanation
This symbol represents a variable resistor or rheostat—a resistor whose resistance can be adjusted. The diagonal arrow is the key: it shows that the resistance value isn't fixed, but can be changed by moving a sliding contact along the resistive material. Think of it as a resistor with a built-in control that lets you tune how much it opposes current flow, which is essential in circuits where you need to adjust voltage, current, or brightness (like a dimmer switch).
Intuitive explanation
This symbol represents a variable resistor or rheostat—a resistor whose resistance can be adjusted. The diagonal arrow is the key: it shows that the resistance value isn't fixed, but can be changed by moving a sliding contact along the resistive material. Think of it as a resistor with a built-in control that lets you tune how much it opposes current flow, which is essential in circuits where you need to adjust voltage, current, or brightness (like a dimmer switch).