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Questions and Answers
What type of quantity is electric current?
What type of quantity is electric current?
- Scalar (correct)
- Directional
- Vector
- Magnitude
What is the SI unit of resistance?
What is the SI unit of resistance?
- Ohm (correct)
- Ampere
- Watt
- Volt
What is the rate of flow of charge denoted by?
What is the rate of flow of charge denoted by?
- R
- i (correct)
- V
- Q
What is the physical quantity that current is directly proportional to?
What is the physical quantity that current is directly proportional to?
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What type of substances do not obey Ohm's law?
What type of substances do not obey Ohm's law?
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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.
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