A voltage source Vs = Vm sin‚âà √¨‚à ö¬¢t is connected in series with a resistance R and an SCR. At some firing angle delay of ‚âà √≠¬¨¬± a positive gate pulse is applied to the SCR which turns on the SCR. Considering ideal conditions, at the instant ‚âà √≠¬¨¬± the voltage at the resistor terminals Vo

• A. falls to zero
• B. falls to –Vm sin α
• C. rises to Vm sin α
• D. rises to Vm sin ωt