What is an electric current GCSE?
Electric current is the rate of flow of electric charge . No current can flow if the circuit is broken – for example, when a switch is open. An electric current flows when electrons move through a conductor, such as a metal wire.
What is a circuit GCSE?
Electrical circuits are connected in series or in parallel. Circuit components are shown as symbols. There are two types of current, alternating current (AC) and direct current (DC). Physics (Single Science) Electricity.
What is I in q it?
Q = It. Where: Q = quantity of charge in coulombs, C. I = current in amperes, A. t = time in seconds, s.
What does I Q t mean?
Q = I × t. This is when: charge (Q) is measured in coulombs (C) current (I) is measured in amps (A) time (t) is measured in seconds (s)
What law does v IR represent?
Ohm’s Law is V = IR, where V = voltage, I = current, and R = resistance. Ohm’s Law allows you to determine characteristics of a circuit, such as how much current is flowing through it, if you know the voltage of the battery in the circuit and how much resistance is in the circuit.
What makes a circuit parallel?
A Parallel circuit has certain characteristics and basic rules: A parallel circuit has two or more paths for current to flow through. Voltage is the same across each component of the parallel circuit. The sum of the currents through each path is equal to the total current that flows from the source.
What happens if there is no resistance in a circuit?
If there really were no resistance in the circuit, the electrons would go around the circuit, and arrive back at the beginning of the circuit with as much energy as the potential difference (the voltage). That final energy is usually what is dissipated as heat or other types of energy by the circuit.
What does F mean in physics?
F = force m = mass a = acceleration Newton’s Second Law.
What is i in q it?
What is r in electricity?
R is the resistance of the resistor in ohms (Ω). V is the voltage drop on the resistor in volts (V). I is the current of the resistor in amperes (A).