High School

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If 3 identical resistors are connected in series to a 12 V battery, what is the voltage difference across one of the resistors?

A. 3 V
B. 6 V
C. 2 V
D. 4 V

Answer :

the following are some key concepts related to the topic: Voltage Voltage, also known as electromotive force, is a measure of electric potential energy.

  • It is denoted as V and measured in volts (V). It represents the potential difference between two points in an electrical circuit, which enables electric current to flow between them.
  • A device known as a voltmeter is used to measure voltage. Resistors Resistors are electrical components that resist the flow of electric current in a circuit.
  • They are used to reduce the current flow or divide the voltage in a circuit. Resistors are denoted by the symbol R and measured in ohms (Ω).
  • They have a specific value that determines how much they resist the current flow.
  • Series circuitA series circuit is a type of electrical circuit in which the components are arranged in a single line.
  • The current flow is the same throughout the circuit, and the voltage is divided among the components.
  • The total resistance in a series circuit is the sum of the individual resistances.
  • If three identical resistors are connected in series to a 12 V battery, the voltage across each resistor will be the same.
  • Therefore, the voltage difference across one resistor can be determined by dividing the total voltage by the number of resistors. In this case, the voltage across one resistor will be 4 V. Therefore, the answer to the student's question is 4 V.

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