The sum of the voltage drops around any closed loop, including the internal voltage drop within a voltage source, is equal to the
A) internal voltage drop
B) e.m.f. of the voltage source
C) external voltage drop

Question

Quizplus · Accepted Answer

This is known as Kirchhoff's voltage law, which states that the algebraic sum of the voltage drops around any closed loop is equal to the e.m.f. of the voltage source. This means that the sum of all the voltage drops in a circuit must equal the energy supplied by the voltage source.

The Sum of the Voltage Drops Around Any Closed Loop