The current flowing is directly proportional to the applied voltage between two points in a conductor, according to Ohms law.
If the resistors are connected in series, then the total resistance in the circuit is sum of the individual resistances. The equation for the equivalent resistance is
The equation for the voltage in the circuit is
Here is the current in the circuit. Substitute the calculated resistance and current then
Hence, option (B), (C) and (D) are incorrect answers.
The voltage across the circuit is .
Hence, option is the correct answer.