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If a 9V battery is connected to a 3Ω resistor, what is the voltage drop across t

Practice Questions

Q1
If a 9V battery is connected to a 3Ω resistor, what is the voltage drop across the resistor? (2023)
  1. 3V
  2. 6V
  3. 9V
  4. 12V

Questions & Step-by-Step Solutions

If a 9V battery is connected to a 3Ω resistor, what is the voltage drop across the resistor? (2023)
  • Step 1: Identify the voltage of the battery, which is 9V.
  • Step 2: Identify the resistor value, which is 3Ω.
  • Step 3: Understand that when a battery is connected to a resistor, the voltage drop across the resistor is equal to the voltage of the battery.
  • Step 4: Conclude that the voltage drop across the 3Ω resistor is the same as the battery voltage, which is 9V.
  • Ohm's Law – The relationship between voltage, current, and resistance in an electrical circuit, typically expressed as V = IR.
  • Voltage Drop – The reduction in voltage across a component in a circuit, which can be equal to the source voltage if the component is the only load.
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