Resistivity is the resistance between opposite faces on a 1m cube of a material
Respuesta
True
False
Pregunta 4
Pregunta
A copper wire is heated up then connected to a supply. Describe what happens to the voltage drop across the wire.
Respuesta
It increases
It decreases
It stays the same
Pregunta 5
Pregunta
What factors affect resistance
Respuesta
Length
Temperature
Frequency
Area
Time
Pregunta 6
Pregunta
Two resistors are in parallel. The resistance will go:
Respuesta
Up
Down
Pregunta 7
Pregunta
A voltage source has been applied to a resistor and a reading of 2A was found. Later it was found that the current has increased to 2.7A despite the voltage not changing.
Respuesta
The temperature increased
The temperature decreased
Pregunta 8
Pregunta
What is the formula for the temperature coefficient of resistance