Electricity Flashcards
If the insulation material gains electrons it becomes…
Negatively charged e.g.polythene rod
If the insulating material loses electrons it becomes…
Positively charged e.g. Perspex rod
Why do certain insulating materials become charged when rubbed together?
Because electrons are transferred from one material to the other
A battery consists of…
Two or more cells connected together
What does Ohms Law state?
That the current through a resistor is directly proportional to the potential difference across the resistor
What happens to the resistance of a LDR as the light intensity increases?
It decreases
What are direct and alternating current?
Direct current is one direction only. Alternating current repeatedly reverses its direction
An appliance with a plastic case is what?
Double insulated
