SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/elec-kirchhoff-loop

Counting the source too, the voltage changes around any closed loop in a circuit add up to what?

Around a closed loop the changes sum to zero.

Start playing free

  1. Zero ✔
  2. The supply voltage
  3. The total resistance

Why: Every volt a source supplies is used up by the loads. This is the loop rule, and it is how you find voltage drops.

Huh, didn't know that: OpenStax explains the loop rule as an application of conservation of energy.

The dad joke
A sweater I bought kept picking up static electricity, so I returned it. They gave me another one free of charge.
Like this card?
Play the game

References

Answer: Zero. Every volt a source supplies is used up by the loads. This is the loop rule, and it is how you find voltage drops.

  1. OpenStax College Physics 2e, 21.3 Kirchhoff's Rules openstax.org/books/college-physics-2e/pages/21-3-kirchhoffs-rules
    The algebraic sum of changes in potential around any closed circuit path (loop) must be zero.
    Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Trades & ShopOne ohm of resistance is defined as one volt for every what?Trades & ShopIn Ohm's law, current through a resistor is directly proportional to what?Trades & ShopIn a parallel circuit, which quantity is the same across every branch?

That's stuff everyone should know.