a resistor of 2ohms is connected to a cell,when the magnitude of current is i.if another resistor of resistance 2ohms is connected in series to resistor of 2ohms,the magnitude of current will be?
Because your question does not specified that V changes therefore I assume it is constant. This is valid in this instance, but do try to avoid making assumptions when analysing circuits.
Note that if V does change then this will have an impact on the magnitude of i.