12 Questions
What happens to the resistance of a wire if its length is doubled?
The resistance is doubled
How does doubling the cross-sectional area of a wire affect its resistance?
The resistance is halved
What is the temptation when Ohm's law is written as V = I × R?
To define voltage in terms of current and resistance
Why can't Ohm's law be applied to areas with no current flow, like static electricity?
Because there is no current flow in static electricity
Why does a thinner wire experience more collisions for the same current compared to a thicker wire?
Due to a smaller volume that electrons pass through in a thinner wire
How does increasing the length of a wire affect the current flowing through it?
Decreases the current
What did Georg Simon Ohm's experimental results regarding resistance focus on?
Observable effects
How did Georg Simon Ohm define resistance?
Voltage divided by current flow
Which symbol is used to designate a resistor?
Ω
How is one ohm defined?
1 V/1 A
What kind of materials do not obey Ohm's law?
Nonohmic materials
Why is Ohm's law considered an empirical statement?
It is based on experimental observations
Test your knowledge on electrical resistance and Ohm's law with this quiz. Questions cover the concepts of electron collisions, lattice ions, impurities, and the relationship between resistance and different materials.
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