Which form of Ohm's Law expresses current as the voltage divided by resistance?

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Multiple Choice

Which form of Ohm's Law expresses current as the voltage divided by resistance?

Explanation:
Ohm's Law in this form relates current directly to voltage and inversely to resistance: I = V / R. This means current increases when voltage rises and decreases when resistance goes up, assuming the other quantity stays the same. For example, with 9 volts across a 3-ohm resistor, the current is 9 divided by 3, which equals 3 amperes. The other expressions don’t fit: V = I × R is the form used to calculate voltage, not V = I / R; I = R / V would give the wrong units (it would be 1/amps), and V = I / watts isn’t dimensionally correct since watts already represent power.

Ohm's Law in this form relates current directly to voltage and inversely to resistance: I = V / R. This means current increases when voltage rises and decreases when resistance goes up, assuming the other quantity stays the same. For example, with 9 volts across a 3-ohm resistor, the current is 9 divided by 3, which equals 3 amperes. The other expressions don’t fit: V = I × R is the form used to calculate voltage, not V = I / R; I = R / V would give the wrong units (it would be 1/amps), and V = I / watts isn’t dimensionally correct since watts already represent power.

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