(2) Electrical resistance Flashcards
1
Q
What is the unit of resistance?
A
Ohms (Ω)
2
Q
What is the formula for resistance?
A
Resistance= Voltage/Current
3
Q
What are resistors?
A
They are components in a circuit used to control the sizes of currents and voltages.
4
Q
What are variable resistors?
A
They are resistors with the capability of altering their resistance.
5
Q
What is a thermistor?
A
A resistor whose resistance changes a lot with small changes in temperature.
6
Q
What is a LDR?
A
A resistor that changes resistance when light is shone on it.
7
Q
What is a diode?
A
A special type of resistor that only allows charges to flow in one direction. If the charges were to flow in the other direction there would be very high resistance in the ciruit.
