All Flashcards
What is the circuit symbol for a battery?
A long line and a short line, parallel to each other. The long line represents the positive terminal.
What is the circuit symbol for a resistor?
A zig-zag line.
What is the circuit symbol for a capacitor?
Two equal length parallel lines.
What is the circuit symbol for a switch?
An open circuit with a hinged line that can close the circuit.
How do you calculate current (I) if you know the charge ((\Delta Q)) and time ((\Delta t))?
Use the formula:
How do you calculate current (I) using the microscopic current equation?
Use the formula: , where n is the number density of charge carriers, q is the charge of each carrier, A is the cross-sectional area, and (v_d) is the drift velocity.
What is the difference between how ammeters and voltmeters are connected in a circuit?
Ammeters are connected in series. Voltmeters are connected in parallel.
What is the difference in internal resistance between ideal ammeters and voltmeters?
Ideal ammeters have very low internal resistance. Ideal voltmeters have very high internal resistance.