What is the process called that converts alternating current to direct current?

• A. Amplification
• B. Rectification
• C. Filtration
• D. Oscillation

Answer: (B)

Rectification is the process that converts alternating current to direct current. In AC, current reverses direction each half cycle. A rectifier uses diodes to conduct during one half-cycle and block during the other, producing current that flows in one direction only. The result is pulsating DC, which is typically smoothed with a filter to produce a steadier DC output. Amplification increases signal strength but doesn’t change the direction of flow, filtration is used to reduce ripple after rectification, and oscillation creates AC rather than converting it to DC.