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