If the current in a circuit is doubled while the resistance remains constant, wh

Practice Questions

Q1
If the current in a circuit is doubled while the resistance remains constant, what happens to the voltage?
  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Questions & Step-by-Step Solutions

If the current in a circuit is doubled while the resistance remains constant, what happens to the voltage?
  • Step 1: Understand Ohm's Law, which states that Voltage (V) = Current (I) x Resistance (R).
  • Step 2: Identify that in this scenario, the resistance (R) is constant.
  • Step 3: Note that if the current (I) is doubled, we can represent this as I' = 2I, where I' is the new current.
  • Step 4: Substitute the new current into Ohm's Law: V' = I' x R.
  • Step 5: Replace I' with 2I in the equation: V' = (2I) x R.
  • Step 6: Simplify the equation: V' = 2(IR) = 2V, where V is the original voltage.
  • Step 7: Conclude that if the current is doubled, the voltage must also double.
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