5 Questions
What type of quantity is electric current?
Scalar
What is the SI unit of resistance?
Ohm
What is the rate of flow of charge denoted by?
i
What is the physical quantity that current is directly proportional to?
Potential difference
What type of substances do not obey Ohm's law?
Gases, crystal rectifiers, thermionic valves, transistors
Study Notes
Electric Current and Resistance
- Electric current is a scalar quantity.
- The SI unit of resistance is the ohm (Ω).
Electric Current and Charge Flow
- The rate of flow of charge is denoted by electric current.
- Electric current is directly proportional to the drift velocity of charge carriers.
Non-Ohmic Materials
- Non-metallic conductors, electrolytes, and semiconductors are examples of substances that do not obey Ohm's law.
Test your understanding of electric current with this quiz. Explore concepts such as current denotation, flow of charge, conductors, and current carriers in liquids. See how much you know about this essential aspect of electrical circuits.
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