Forces and there effects Flashcards
(15 cards)
Describe the differences between a series and parallel circuit
In series circuits, components are connected in a single loop, creating only one path for current flow. In parallel circuits, components are connected in separate branches, providing multiple paths for current to flow
What is the electric current
It is the flow of charge
What is the equation for energy transferred
E=QV
Q=charge(coulombs)
What is the current in a metal
The flow of electrons
What is the Equation for charge
Q=It
What is the equation for potential difference
V=IR
Pd is measured in ohms
What is resistance
How much material opposes the flow of charge
how the resistance of a light-dependent resistor (LDR) varies with light intensity
As light intensity increases the resistance decreases
Describe how the resistance of a thermistor varies with change of temperature
it decreases as temperature increases
What is the equation for energy transferred
E=Ivt
What is the equations for power
P=E/t
P=I²R
What is the definition of alternate current
A current that can change it direction
What is the definition of direct current
Current that can only move in one direction
Explain why switches and fuses should be connected in the live wire of a domestic circuit
it ensures that when the switch is off or the fuse blows, the appliance is disconnected from the high-voltage source, making it safer to handle
Recall the potential differences between the live, neutral and earth mains wires
Recall the potential differences between the live, neutral and earth mains wires
