Which two fundamental electrical quantities are related by the Ohm's Law?

The Correct answer is Voltage and Current.

Key Points

• Ohm's Law is one of the fundamental principles in electricity and electronics.
• It establishes a direct relationship between voltage (V), current (I), and resistance (R) in an electrical circuit.
• The law is mathematically expressed as: V = I × R, where:
  • V is the voltage in volts.
  • I is the current in amperes.
  • R is the resistance in ohms.
• Ohm's Law implies that if the resistance in a circuit is constant, the voltage and current are directly proportional to each other.
• This relationship helps in determining unknown quantities when any two parameters (voltage, current, or resistance) are known.
• It is widely used in the design and analysis of electrical circuits and is a fundamental concept in physics and engineering.
• Ohm's Law is applicable to linear circuits, where the resistance remains constant regardless of the voltage or current.

 Additional Information

• Current and Power
  • Power (P) in an electrical circuit is related to both current (I) and voltage (V) through the formula P = V × I.
  • While power is an important concept, it is not directly related to Ohm's Law, which focuses on the relationship between voltage, current, and resistance.
• Power and Resistance
  • Power can also be expressed in terms of resistance using the formula: P = I² × R.
  • Although resistance is a factor in power calculations, this is not the primary relationship outlined by Ohm's Law.
• Voltage and Power
  • Voltage and power are related by the formula P = V² / R when resistance is known.
  • However, this relationship involves power and does not directly represent the fundamental principle of Ohm's Law.