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Question

How is voltage related to resistance?


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Solution

Voltage

  1. Voltage is also termed the potential difference.
  2. Potential difference is defined as the work done in bringing a unit positive charge from one point on a conductor to another point on the same conductor.
  3. The unit of potential difference is volt or V.

Resistance

  1. When current flows through a circuit it experiences a resistive force.
  2. The parameter that gives the magnitude of resistive force experienced by the current is called resistance.
  3. The unit of resistance is ohm or Ω.

Ohm's Law

According to ohms law, the current flowing through a circuit is directly proportional to the voltage across the circuit.

Let V be the voltage, I be current, and R be the constant of proportionality, then

VI

or V=IR

Hence, the relation between voltage and resistance is given above.


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