Physics

Question

Moving 4.0 coulombs of charge through a circuit
requires 48 joules of electric energy. What is the
potential difference across this circuit?
(1) 190 V (3) 12 V
(2) 48 V (4) 4.0 V

2 Answer

  • We know that V=E/Q Where V is the PD, E is the energy, and Q is the charge.

    Substituting in the values gives V=48/4=12

    Therefore the PD across the circuit is 12V
  • The potential difference across this circuit will be 12V.

    What will be the potential difference across this circuit?

    Voltage is defined as the force which pushes the charge in the circuit the flow of charge depends on the voltages.

    It is given that

    Charge  [tex]Q=4\ C[/tex]

    Energy  [tex]E=48 \ J[/tex]

    As we know that potential difference is given as

    [tex]V=\dfrac{E}{Q}[/tex]

    [tex]V=\dfrac{48}{4} =12\ volt[/tex]

    Thus potential difference across this circuit will be 12V.

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