Resistance

Descripción

unknown JTL Unit 63 Resources Test sobre Resistance, creado por giannini.chambers el 22/02/2015.
giannini.chambers
Test por giannini.chambers, actualizado hace más de 1 año
giannini.chambers
Creado por giannini.chambers hace alrededor de 9 años
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2

Resumen del Recurso

Pregunta 1

Pregunta
Temperature doesn't affect resistance
Respuesta
  • True
  • False

Pregunta 2

Pregunta
(Resistance x Length)/Area= Resistivity
Respuesta
  • True
  • False

Pregunta 3

Pregunta
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
Respuesta
  • R=Ro(1+α(T-To))
  • R=Ro(1xα(T-To))
  • Ro=R(1xα2))
  • R=Ro(αT)

Pregunta 9

Pregunta
Resistance=(Resistivity X Length)/Area
Respuesta
  • True
  • False
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