SAT Subject Physics Practice Question 274: Answer and Explanation

Next steps

Question: 274

45.

The circuit shown contains two switches: S1, which can connect to point X, and S2, which can connect to point Y.

If both switches are left in the positions shown in the diagram, what is the current through the resistor R?

A. 0
B.
C.
D.
E.

Correct Answer: A

Explanation:

If both switches S1 and S2 are open, the middle, vertical branch of the pictured circuit is effectively removed. There’ll be current around the perimeter of the circuit, but none down the middle branch.

Previous       Next