Question

B₁, B₂, B₃, and B₄ are identical light bulbs. There are six voltmeters connected to the circuit as shown. All voltmeters are connected so that they display positive voltages. Assume that the voltmeters do not affect the circuit.

If B₂ were to burn out, opening the circuit, which voltmeter(s) would read zero volts?

(A) none would read zero 

(B) only V₂ 

(C) only V₃ and V₄ 

(D) only V₂, V₄, and V₅ 

(E) they would all read zero

Answer 1

The correct option is: (B) only V₂ 

Explanation:

Even though B₂ burns out, the circuit is still operating elsewhere as there are still closed paths.