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Understanding Electrical Resistance and Ohm's Law Quiz

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Understanding Electrical Resistance and Ohm's Law Quiz

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Questions and Answers

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?

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?

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?

Because there is no current flow in static electricity Signup and view all the answers

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 Signup and view all the answers

How does increasing the length of a wire affect the current flowing through it?

Decreases the current Signup and view all the answers

What did Georg Simon Ohm's experimental results regarding resistance focus on?

Observable effects Signup and view all the answers

How did Georg Simon Ohm define resistance?

Voltage divided by current flow Signup and view all the answers

Which symbol is used to designate a resistor?

Ω Signup and view all the answers

How is one ohm defined?

1 V/1 A Signup and view all the answers

What kind of materials do not obey Ohm's law?

Nonohmic materials Signup and view all the answers

Why is Ohm's law considered an empirical statement?

It is based on experimental observations Signup and view all the answers