Question

1. since c2 is open, r2

a measures 0 volts
b causes maximum current
c causes current to increase
d measures the applied voltage

Explanation:

When capacitor \( C2 \) is open, the branch containing \( R2 \) has no current (since an open capacitor in an AC circuit, for the DC - like analysis of open circuit, or in terms of AC, an open capacitor blocks current). By Ohm's law \( V = IR \), if \( I = 0 \), then the voltage across \( R2 \) (\( V_{R2}=IR2 \)) is 0. So \( R2 \) measures 0 volts. Option b is wrong because no current flows through \( R2 \) to cause maximum current. Option c is wrong as current through \( R2 \) is zero, not increasing. Option d is wrong as \( R2 \) has 0 voltage, not the applied voltage.

Answer:

a. measures 0 volts