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In the context of resistors and Ohm's law, what is the SI unit of electrical resistance?
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27. Resistors & DC Circuits
Resistors and Ohm's Law
Scelta multipla
In the context of resistors and Ohm’s law, what quantity describes the opposition to electric current flow in a circuit?
A
Electrical power, measured in watts ()
B
Electrical resistance, measured in ohms ()
C
Electric current, measured in amperes ()
D
Electric potential difference (voltage), measured in volts ()
Guida verificata passo dopo passo1
Understand that the problem is asking for the quantity that represents the opposition to electric current flow in a circuit.
Recall Ohm's law, which relates voltage (V), current (I), and resistance (R) in a circuit: \(V = I \times R\).
Recognize that resistance (\(R\)) is the property that opposes the flow of electric current, causing the current to be reduced for a given voltage.
Note that resistance is measured in ohms, symbolized by the Greek letter omega (\(\Omega\)).
Differentiate resistance from other quantities: electrical power (watts, \(W\)) is the rate of energy transfer, current (amperes, \(A\)) is the flow of charge, and voltage (volts, \(V\)) is the electric potential difference driving the current.
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