2099301
Descrição
Quiz por giannini.chambers, atualizado more than 1 year ago
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Criado por giannini.chambers
quase 10 anos atrás
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Questão 1
Questão
Temperature doesn't affect resistance
Responda
- True
- False
Questão 2
Questão
(Resistance x Length)/Area= Resistivity
Responda
- True
- False
Questão 3
Questão
Resistivity is the resistance between opposite faces on a 1m cube of a material
Responda
- True
- False
Questão 4
Questão
A copper wire is heated up then connected to a supply. Describe what happens to the voltage drop across the wire.
Responda
-
It increases
-
It decreases
-
It stays the same
Questão 5
Questão
What factors affect resistance
Responda
-
Length
-
Temperature
-
Frequency
-
Area
-
Time
Questão 6
Questão
Two resistors are in parallel. The resistance will go:
Responda
-
Up
-
Down
Questão 7
Questão
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.
Responda
-
The temperature increased
-
The temperature decreased
Questão 8
Questão
What is the formula for the temperature coefficient of resistance
Responda
-
R=Ro(1+α(T-To))
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R=Ro(1xα(T-To))
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Ro=R(1xα2))
-
R=Ro(αT)
Questão 9
Questão
Resistance=(Resistivity X Length)/Area
Responda
- True
- False
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