Podcast
Questions and Answers
What happens to the resistance of a wire if its length is doubled?
What happens to the resistance of a wire if its length is doubled?
- The resistance is halved
- The resistance is doubled (correct)
- The resistance remains the same
- The resistance quadruples
How does doubling the cross-sectional area of a wire affect its resistance?
How does doubling the cross-sectional area of a wire affect its resistance?
- The resistance is halved (correct)
- The resistance remains the same
- The resistance quadruples
- The resistance doubles
What is the temptation when Ohm's law is written as V = I × R?
What is the temptation when Ohm's law is written as V = I × R?
- To define voltage in terms of current and resistance (correct)
- To define current in terms of voltage and resistance
- To define resistance in terms of voltage and current
- To define current in terms of resistance and voltage
Why can't Ohm's law be applied to areas with no current flow, like static electricity?
Why can't Ohm's law be applied to areas with no current flow, like static electricity?
Why does a thinner wire experience more collisions for the same current compared to a thicker wire?
Why does a thinner wire experience more collisions for the same current compared to a thicker wire?
How does increasing the length of a wire affect the current flowing through it?
How does increasing the length of a wire affect the current flowing through it?
What did Georg Simon Ohm's experimental results regarding resistance focus on?
What did Georg Simon Ohm's experimental results regarding resistance focus on?
How did Georg Simon Ohm define resistance?
How did Georg Simon Ohm define resistance?
Which symbol is used to designate a resistor?
Which symbol is used to designate a resistor?
How is one ohm defined?
How is one ohm defined?
What kind of materials do not obey Ohm's law?
What kind of materials do not obey Ohm's law?
Why is Ohm's law considered an empirical statement?
Why is Ohm's law considered an empirical statement?
