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If the voltage across a resistor is increased from 5V to 10V, what happens to th

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Question: If the voltage across a resistor is increased from 5V to 10V, what happens to the current through the resistor if the resistance is constant? (2021)

Options:

  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Correct Answer: It doubles

Exam Year: 2021

Solution: 

According to Ohm\'s law, if voltage increases and resistance remains constant, current will also increase proportionally.

If the voltage across a resistor is increased from 5V to 10V, what happens to th

Practice Questions

Q1
If the voltage across a resistor is increased from 5V to 10V, what happens to the current through the resistor if the resistance is constant? (2021)
  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Questions & Step-by-Step Solutions

If the voltage across a resistor is increased from 5V to 10V, what happens to the current through the resistor if the resistance is constant? (2021)
  • Step 1: Understand Ohm's Law, which states that Voltage (V) = Current (I) x Resistance (R).
  • Step 2: Identify the initial voltage across the resistor, which is 5V.
  • Step 3: Identify the new voltage across the resistor, which is 10V.
  • Step 4: Note that the resistance (R) remains constant throughout this scenario.
  • Step 5: Since voltage is increasing from 5V to 10V, we can see that the voltage is doubling.
  • Step 6: According to Ohm's Law, if the voltage increases and resistance stays the same, the current must also increase.
  • Step 7: Therefore, the current through the resistor will increase as the voltage increases from 5V to 10V.
  • Ohm's Law – Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature remains constant.
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